Robimo charger for 12V lead-acid batteries from a computer PSU in ATX format. part 4

Option 5.

Well, axis, it was trapilos newcomer. This time LPK2-30 with PWM on SG6105. I have never had such a “beast” for processing before. Ale, I guessed the numerical supply on the forum and the skargi of coristuvachiv on the problems of rebuilding blocks on the next m / s. I praised the solution, even though charging is less and not needed, it is necessary to overcome the m / s for the sake of sports interest for the sake of people. And at the same time, try it out in practice, which vibrated in my head the idea of ​​an original way of indicating the charge mode.
Axis of wines, with a powerful person:

Photo 18

Pochav, how to start, I will describe the recovery. Having shown that it is similar to LPG-899, but there are acts of authority. The presence of 2 vbudovannyh TL431 on board, rіch, zvichayno, tsіkava, ale ... for us - nesuttєva. And the axis of power in the lance to control the voltage of 12V and the appearance of an input for the control of negative voltages makes our task easier, but in reasonable boundaries. The main folding, on the input of the LPG-899, was due to the fact that on the input voltage control 12V it was necessary to apply more voltage to the lower voltage of the SHIM. It was possible to take the output voltage, the resistor + stabilitron, but I didn’t want to. The voltage I needed showed up on another output: 15V. It was victorious for the life of a cascade of transistors. I have also tried to deceive the entrance to the control of the positive voltage of the PWM. With the input to the control of negative voltages, it’s not surprising that everything turned out to be simpler. Seeing the documentation, there was an internal strum, and the voltage at that input was controlled. That's the banal law of old Ohm, giving us a final opinion.
As a result of reflections and non-trivial dances with a tambourine (where else without them) the following project was born:

Rice. 7.

The axis of the photo of this block has already been converted to one channel 14.4V, yet without payment for indication and control. On another yogo return bik:

Photo 19 and 20.

And for the insides of the block in the collection, that ovnishnіy look:

Photo 21 and 22.

To pay attention, that the main board was cut by 180 degrees, due to its cob rotation, so that the radiators did not care about the installation of the elements of the front panel.
Zagalo tse trohi of forgiveness option 4
As a dzherelo for the formation of "fraudulent" voltages at the control inputs, 15V was taken to power the transistors in the circuit (I already wrote about the head). It's in the kit with R2-R4 to do everything you need. R26 for negative voltage control input.
The reference voltage for the comparator equals was taken as the voltage of the drawing, the SG6105. For great accuracy is not necessary for us.
Adjustment of the fan revolutions can also be done.
And the axis of indication was a bit modernized (for diversity and originality). Virishiv robiti behind the principle of a mobile phone: a jar that reminds me of it. For this, I took a back-to-back light indicator with a glowing anode (the scheme of verification is not required - you don’t know the biblical element in the library, but draw a molt), and turn it on as shown in the diagram. It didn’t seem like it was conceived, instead of that, the average gas “g” under the regime of freezing, the stream of charge was extinguished, it was like stench flickering. Otherwise, everything is fine.
The indication looks like this:

Photo 23 and 24.

It can be seen not importantly, but without becoming a Photoshop editor. You can still see how amazing you are.
On the first photo, the mode is charged with a stable voltage of 14.7V, on the other - a block near the mode of exchange of the stream. If the strum becomes low, close the upper segments of the indicator, and the voltage at the output of the charger is up to 13.9V. Tse can be better in the photo, induced by the trochs more.
So, as the voltage at the rest stage is only 13.9V, you can safely recharge the battery like a year before, if you don’t bring it to you, give the car’s generator a bigger voltage.
Obviously, in this variant it is possible to win the control board from option 4. The GS6105 connection is only necessary to work like this.
So, not forgetting a little. Resistor R30 install it yourself - it's not obov'yazkovo. Simply, I didn’t manage to change the rating of the parallel R5 or R22 to take the output voltage off. Axis and wyvernivsya such ... unconventional rank. You can just pick the ratings R5 or R22, as I'm working for other options.

For the rest of the ShІM, there is still no way, the BP did not traipse.
For the time being, work to go at the bіk izmenshennya ruhіv іla during reworking in the simplest vipadkas and rozrobki new lotions.

You can add more than a dozen microcircuits of PWM controllers, which are used to control the system unit of a personal computer to the ATX form factor. All these microcircuits are similar, even if they have to be handled by one and the same attachment - the system unit of life. Prote dminnosti є. The same values ​​determine the difference in the circuitry of the blocks of life and the difference goes to the diagnosis of microcircuits. We already looked at a lot of PWM controllers for system blocks of life, and now the devil has gone to such a microcircuit, like LPG899, like not so wide, like, for example, TL494 or SG6105, but still, you can see in such blocks of life, like Linkworld, to the point, even more popular on the domestic market.

The microcircuit of the PWM controller LPG899 is recognized for the implementation of the ATX standard in system units, prompting the push-pull switcher circuit. The LPG899 microcircuit ensures the following functions:

- shaping of signals for shaping by power transistors of a push-pull turntable;

- control of the output voltages of the live block (+3.3V, +5V, +12V) for their movement, as well as the presence of a short hum in the channels;

- Zakhist in the form of a significant change in the voltage;

- control of negative voltages to the block of life (-12V and -5V);

- Forming the Power Good signal;

- control of the remote switching signal (PS_ON) and the start of the block of life at the moment of activation of the signal;

- Safeguarding the "soft" start of the block of life.

Fig.1 LPG-899 microcircuit pinout

Vikonan microcircuit in a 16-pin package (Fig. 1). As the voltage of life vikorisovuetsya + 5V, which vibrates with a heart of life (+ 5V_SB). Zastosuvannya LPG899 allows you to forgive the circuitry of the living block, because. The microcircuit is an integral part of some of the main modules of the core part of the life block, and itself:

- PWM controller;

- lanceugs in the control of external voltages:

- Forming circuits for the Power Good signal;

- control circuits for the PS_ON signal and remote start of the live block.

Fig.2 Functional block diagram of the controller LPG-899

The functional diagram of the LPG899 PWM controller is shown in fig. A description of the contacts of the PWM controller and one of the main features of the functionality is given in Table 1.

Table 1. LPG-899 chip contacts

№	Nameniv.	Enter /exit	Description
	V 33	Enter	Input voltage control channel 3.3V. Through the contact, there is a voltage shift in the channel and a decrease in voltage (which causes a short flicker in the voltage channel). Contact without intermediary connection with +3.3V channel. І voltage shift, and short flickering lead to blocking of the output impulses of the microcircuit. The input impedance to the contact should be 47 kOhm.
	V 5	Enter	Input to the control of the voltage channel + 5V. Through the contact, there is a voltage shift in the channel and a decrease in voltage (which causes a short flicker in the voltage channel). Contact without intermediary connection with +5V channel. І voltage shift, and short flickering lead to blocking of the output impulses of the microcircuit. The input impedance to the contact should be 73 kOhm.
	V 12	Enter	Input voltage control channel + 12V. Through the contact, there is a voltage shift in the channel and a decrease in voltage (which causes a short flicker in the voltage channel). The voltage of the +12V channel is applied to the entire contact through a resistor that is between. As the voltage is shifted, and a short flicker in the +12V channel leads to blocking of the output impulses of the microcircuit. The input impedance to the contact should be 47 kOhm.
	PT	Enter	Entry to hell. The contact can be changed in a different way depending on the practical scheme of inclusion. This input signal allows you to protect against extreme voltage surges (so the contact potential is lower than 1.25V) or it allows you to block the operation of the protection from short circuits (so the contact potential is lower than 0.625V). The input impedance to the contact should be 28.6 kOhm.
	GND	life	Zagalny for lansyug lively and logical part of the microcircuit
	CT		Contact for connecting a frequency capacitor. At the moment the microcircuit is energized, on this contact, a sawtooth voltage is generated, the frequency of which is determined by the capacity of the connected capacitor.
	C 1	leave	Exit the microcircuit. Impulses are generated on contacts with trivality, which changes. The impulses of this contact are transferred from the antiphase of impulses to terminal 8.
	C 2	leave	Exit the microcircuit. Impulses are generated on contacts with trivality, which changes. The pulses of this contact are transferred to the antiphase of the pulses on pin 7.
	REM	Enter	Entrance to the remote control signal PS_ON . Set a low level to this contact before starting the microcircuit, and start generating pulses on pin 7 and pin 8.
	TPG		Contact for connecting a capacitor, which sets the time delay when forming a signal powergood.
	PG	leave	Output signal Power Good - PG (eating is normal). Setting a high level on this contact means that the entire output voltage of the power supply unit is within the allowable range.
	DET	Enter	Detector input that controls the signal power good . This contact can, for example, be twisted to prevent signal dropping PG have a low rіven when the primary line is lost.
	VCC	life	Life voltage input +5V
	OPOUT	leave	Vihіd vnutrishny pіdsilyuvacha pardon.
	OPNEGIN	Enter	Іnvertuyuchy entry pіdsilyuvacha pardon. Tsej vnutrishnіy pіdsilyuvach pardon zdіysnyuє porivnyannya signal OPNEGIN with signal vadj on pin 16. The internal contact is offset by 2.45 times the reference voltage. This contact is also vikoristovuetsya for the connection of the ovnіshny compensating lancet, which allows you to turn the frequency response of the closed loop of the zv'yazku pіdsilyuvacha.
	VADJ	Enter	The entrance of the internal pardon, which is not inverted. The most typical type of contact is the control of the combined signal of the return link of the channels + 5V and + 12V. To change the potential contact to change the frequency of output impulses of the microcircuit, tobto. Through this contact, the stabilization of the external voltages of the block of life is stabilized.

Impulses, which control the power transistors of a push-pull converter, are formed on contacts C1 and C2, which are outputs with a critical drain. The internal transistors, which form the signals C1 and C2, are switched in opposite phase, which is provided with a Flip-Flop trigger, which can be driven by the input frequency switch (FF-CLK) navpіl. Trivality of pulses FF-CLK is measured by two comparators:

- PWM comparator;

- "dead" hour comparator (pause comparator).

The PWM comparator ensures the equalization of the saw-tooth voltage, which is formed on the output of CT, from the signal of the constant stream, which is formed by the signal of the pardon (signal OPOUT).

The comparator of the "dead" hour ensures that the spike-like voltage, which is formed on the output of CT, is formed by the PROTOUT signal, which is formed by the trigger. At the moment of activation, one of the PROTOUT signals, setting at a high level, blocks the work of the comparator of the "dead" hour, which leads to the generation of the FF-CLK signal, and as a result, to the presence of pulses on the outputs C1 and C2. At the input of the dead hour comparator, a constant dead time is applied (DTC is indicated on the diagram), which is set by the internal voltage regulator. This offset sets the minimum value of the "dead" hour, which guarantees that between the pulses on the contacts C1 and C2 there is a small "gap" (div. Fig. 3). "Dead hour" (the moment when the transistors are closed) the protection of the power transistors in the event of a "breakdown by the state" is ensured. The principle of functioning of the pulse-width modulation block of the LPG-899 microcircuit is shown in Fig.3.

Fig.3 Functioning principle of pulse-width modulation of the controller LPG-899

The start of the pulse-width modulation block is triggered by the REMON signal, which is formed with a 40.5 ms time delay (the sum of two time delays: 36 ms and 4.5 ms) after the REM input signal is set to low.

At the time of starting the microcircuit, you can use an internal short-circuit protection, because The voltage output of the power supply unit (+3.3V, +5V and +12V) when the microcircuit is started, of course, is still zero. To avoid switching on the microcircuit, the short circuit blocking is blocked for a certain period by the blocking blocking comparator. The short-circuiting delay becomes less practical because the PT contact has a higher potential, lower than 0.62V, tobto. if at the exit of the block of life there is a strong voltage.

The main electrical characteristics and values ​​of the boundary parameters in the microcircuit are presented in Table. 2 and Table 3.

Table 2. Main electrical characteristics of LPG-899

Characteristic	Value			id change.
	xv	type of	Max
Riven spratsovuvannya zahistu vіd pereschennya napruzhenya channel +3.3 V (cont. 1)
Rivne spratsovuvannya zakhistu vіd pereschennya naprugi in kanalі +5 V (cont. 2)
Rivne spratsovuvannya zakhistu vіd pereschennya naprugi in kanalі +12 V (cont. 3)	4.42	4.64	4.90
Rivne spratsovuvannya zakhistu vіd pereschennya naprugi at the input PT (cont. 4)		1.25
Riven spratsovuvannya zahistu in the short flicker near the channel +3.3 V (cont. 1)	1.78	1.98	2.18
Riven spratsovuvannya zakhistu in the short flicker near the channel +5 V (cont. 2)
Riven spratsovuvannya zahistu in the short flicker near the channel +12 V (cont. 3)	2.11	2.37	2.63
Riven blocking the zakhistu from a short flicker at the entrance PT (cont. 4)	0.55	0.62	0.68
Generation frequency (with a frequency-setting capacitor C = 2200 pF)				kHz
Timchas's obstruction shaping the signal power good (with condenser C = 2.2uF)				ms

Table 3. LPG-899 Limit Values

Parameter	Value
Life pressure(VCC)	5.5V
Tension that rises(Pd)	200 mW
Output voltage С1/С2	5.5
Strum exit C1/C2 ( Icc 1, Icc 2)	200 mA
Operating temperature range	vіd -10 to +70 °С

The basic version of the inclusion of the LPG-899 microcircuit, which must be orientated when designing life blocks, the indications in Fig.4. However, in real circuits, you can use the LPG-899 connection.

Fig.4 Typical inclusion of LPG-899

Diagnosis of microcircuit LPG-899

Diagnosing microcircuits is also similar to rechecking a large number of PWM controllers and can be deciphered in ways. The number of methods is based on the informativeness of the results, the flexibility of the review of the results, the type of test control. On the basis of all these factors, fakhivets and accepts a decision on how to re-verify the microcircuit. In addition, the type of malfunction in the life block also influences the diagnostic method.

Express diagnostics

The simplest way to test the LPG-899 microcircuit is to check the її main developments for the presence of a "breakdown". Why should we test contacts:

Through yakі zdіysnyuєtsya zhivlennya microcircuits;

Through this, the control of external voltages to the block of life (+ 3.3V, + 5V and + 12V) is controlled;

For some, external impulses are formed.

To carry out such diagnostics, it is enough for the mother to use only a tester, which allows you to test the lancer. Deyaku part of the re-verification of the microcircuit "for testing" happened to be carried out only after її vipoyuvannya, tk. In output voltage channels (+3.3V, +5V і +12V), navantage resistors with a small support are often installed, so as not to allow the objective picture to be taken away. Without soldering, you can change the life of the microcircuit and її output contacts C1 and C2.

Nasampered, it is necessary to re-verify "for testing" (in order to measure the number of pins 5 - GND), the next contacts of the microcircuit:

VCC (terminal 13);

V33 (cont. 1);

V5 (terminal 2);

V12 (terminal 3);

C1 (terminal 7);

C2 (pin 8).

In different high-voltage circuits of the primary voltage, as well as in the event of a malfunction of the lances of the return link, breakdowns may occur after these contacts, resulting in sharp bursts of the secondary voltage. The presence of small supports (single and tens of ohms) between designated contacts and pin 5 (GND) clearly indicates the need to replace the microcircuit.

When carrying out all tests, the "minus" probe of the tester must be applied to the GND contact, and the "positive" probe to the visnovkіv, which is reversed.

Varto means that the fault of breakdowns behind the indicated contacts, as a rule, leads to great strums through the microcircuit, which is the reason for a strong rozіgrivu, and also can lead to ruining or darkening the case. Therefore, respectful visual control of the microcircuit cannot be turned off at any time.

Simple functional revision

Simple functional diagnostics allows you to reconsider that the microcircuit is "in principle correct", and that the main functional nodes work normally. However, part of the internal cascades of the microcircuit is simplified, the diagnostics still does not allow to be misinterpreted. For example, it allows the Power Good signal to change at the correct circuit.

For a simple functional diagnostics, the presence of an offensive possession is required:

Regulated life jacket;

Oscilloscope;

Tester.

The essence of the verification is in the supply of voltage to the microcircuit LPG-899 from the laboratory voltage supply. The advantage of such an approach is those who, for carrying out diagnostics, do not need to disconnect the microcircuit, and it is not necessary to turn on the life block in the measure, and therefore, it will turn on various emergency situations in the power unit, as they can be incompatible with the circuit.

І stage of simple rechecking

In order to turn on the power supply, it is necessary to apply a voltage of 5.0 - 5.5 V to pin 13 (VCC). Dzherelo may allow regulation of the voltage, so that it would be possible to analyze the influx of VCC changes on the operation of the internal cascades of the microcircuit. This stage of diagnostics allows reconnection at the correctness of the internal reference voltages and the generator, what is set, and also allows reconnection at the presence of a short flicker in the VCC line.

When applying a voltage of life, it is necessary to put respect on the foot:

1) As in the case of the microcircuit livelihood, it’s dzherelo livelier, more for everything, it’s shown to be overwhelmed by the strum, and the microcircuit case is more often pinky.

2) On pin 6 (CT) a saw-tooth voltage may appear, the frequency and amplitude are not liable to change when VCC is changed.

3) On pin 9 (REM) the voltage can be set, which is more VCC, then. approximately 5V. The voltage of the REM signal can vary proportionally with the change in VCC.

II stage of simple rechecking

Prodovzhuyuchi live microchip in zovnishny dzherel zherel, it is necessary to connect pin. In this way, the REM signal is activated. Tse can ensure the start of the microcircuit. At the moment of activation of the REM signal, the microcircuit is liable to start up (for an even short period of time) and on the outputs C1 (pin 7) and C2 (pin 8) a rectangular pulse will appear. Prote practically against the background of protection from emergency modes in robots and blocking of the microcircuit. It should be noted that during the day all other voltages (+3.3V, +5V, +12V etc.) are also analyzed by the microcircuit.

New functional review

Fully functional diagnostics will allow you to re-verify the practicality of the LPG-899 microcircuit. We have already published on the sides of our magazine about the methodology for testing modern PWM controllers in system units, but again, it’s possible to work, even if we have new readers, and without a description of the method, the research about the microcircuit will appear unfinished ..

A fully functional re-verification will require a significantly larger amount of possession. The essence of the re-verification is that, without launching the life block, and without soldering the microcircuit, emulate the presence of all external voltages of the life block. In other words, it will be necessary to report voltages + 5V_SB, + 3.3V, + 5V, + 12V, -12V and -5V to the ventilating unit before the exit. For whom it is possible to vicorate anonymous laboratory cells of life, or it is possible to vicorate another systemic unit of life, arbitrarily, for reference. Another way is more simple and less friable, but does not allow the regulation of the external voltage. The scheme of the conversion stand with the replacement of another system block of life looks approximately like this, as shown in Fig.5. Before speech, the method of vikoristannya another block of life as a laboratory stand appeared on the floor in the distance, but the author of the article independently prepared an adapter from the head rose of one block of life to the head rose of the other. Tse allows you to test the microcircuit even more quickly, tk. and allow the need to switch jumpers out of two blocks of life, and to work out the way of testing the PWM controller is more convenient.

Fig.5 Scheme of the test stand for diagnostics LPG-899

Also, to start the microcircuit, you need to work on the foot:

1) Before the output of the power unit, supply the voltages +5V_SB, +3.3V, +5V, +12V, -12V and -5V.

2) PSON contact of the main power supply unit "short to ground" behind the auxiliary jumper.

3) Turn on the reference block of life to the measure.

As a result, the LPG-899 microcircuit is partially guilty, and її pratsezdatnіst is checked for such signs:

- on pin 7 (C1) and on pin 8 (C2) there are present pulses of a rectangular shape;

- on pin 16 (VADJ) there is a constant voltage with a value of approximately 1.5-2V, which is to say, in a larger world, about the correctness of the call of the lances of the winding sound of the block of life (the value of the voltage of the load to lie in the configuration of the call of the lance of the lantern);

- on pin 14 (OPOUT) - constant voltage;

- on pin 1 (V33) there is a constant voltage of approximately 3V, which can be said about the correctness, like a microcircuit, so about the correctness of the secondary lances in the channel + 3.3V;

- on pin 2 (V5) there is a constant voltage of approximately 5.0V, which can be said about the correctness, like a microcircuit, so about the correctness of the secondary lances in the channel + 5V;

- on pin 3 (V12) there is a constant voltage with a value of approximately 0.7V, which can be said about the accuracy of the microcircuit, and about the accuracy of the secondary lances in the +12V channel (the value of the voltage should lie in the parameters of the resistive dither in the +12V channel);

- on pin 4 (PT) the voltage is restored in the range from 0.7V to 1V (more precisely, the value of the voltage varies depending on the type of circuitry of the living room);

- on pin 6 (ST) a saw-like voltage is formed with a frequency of about 50 kHz;

- on pin 11 (PG) a high level signal of approximately 5V is set.

Povna functional re-verification of the clock, which allows to re-verify as a microcircuit, and practically the entire second part of the life block. Zocrema, this re-verification allows re-verification of the passage of impulses C1 and C2 to the bases of power transistors, which are located in the first part of the live block, which allows re-conversion at the correctness of the uzgodzhuvalny transformer and the sub-siluvial cascade.

But if you want to know that the technique is described more, you can fix it with the improvement of the circuitry of a particular block of life, tobto. won't lie down in the form of a configuration of lanceugs of a pivotal link.

Newsletters at:

Intro.

I have piled up in me a lot of computer power supplies, repairing as a training process, but for modern computers already weak. What to work with them?

Virishiv kіlka to rebuild the memory for charging 12V car batteries.

Option 1.

Otzhe: rozpochali.

First of all, I turned my hand to Linkworld LPT2-20. Which animal has PWM on m/s Linkworld LPG-899. Marveling at the datasheet, the PSU scheme and understanding - elementary!

What turned out to be simply luxurious - you won’t live on 5VSB, so our situations can’t be pushed into the robotic regime. Legs 1,2,3 are twisted to control the output voltage 3.3V, 5V and 12V, depending on the range of allowable voltages. The 4th leg is also the entrance to zahistu and vikoristovuetsya for zahistu vіd vіdkhilen -5V, -12V. We don’t just don’t need us, but we need to respect. Also, you need to turn them on.

The points:

The stage of ruin for whom is over, the time has come to move on to creation.

Behind the great fire, the memory is already ready with us, but in the new there is no exchange of the charging stream (want to protect the short circuit). Schob ZU did not give the battery a “skilki vlize” style - add a lance on VT1, R5, C1, R8, R9, R10. How is she working? Kind of simple. While the voltage drops on R8, which is fed to the VT1 base through the R9 timer, R10 does not exceed the threshold of the transistor's voltage - it closes and does not flow into the robot. And if the axis of the wines starts to turn off, then to the dilnika on R4, R6, R12 the needle from R5 and the transistor VT1 are added, changing the same parameters. I’ll build it up to the fall of the voltage at the output, as a last thing, until the fall of the charging struma. When the denominations are set, the exchange starts at approximately 5A, smoothly lowering the stress on the increase in the tension struma. I nonchalantly recommend this lancet not to run out of circuits, otherwise, with a heavily discharged battery, the strum can be large, so that the staff zahist will work, or power transistors will wiggle, or shots. You can’t charge your battery, if you want smart car enthusiasts to guess at the first stage, turn on the car lamp between the charger and the battery to surround the charging jet.

VT2, R11, R7 and HL1 are engaged in "intuitive" indication of the charge stream. The more light to burn HL1 - the more strum. You can not pick it up, because there is no bazhannya. Transistor VT2 is guilty of buti obov'yazkovo germanium, to the fact that the voltage drop at the B-E transition is much less for the new one, for the silicon one. And that means, and v_dkrivatemeetsya v_n earlier lower VT1.

Lanzyug z F1 and VD1, VD2 provides the simplest protection against polarity reversal. I also recommend to robiti її or choose another one for the relay or else. You can find a lot of options in the Merezha.

And now about those, now it is necessary to throw the 5V channel. For a 14.4V fan, it’s a bit funny, especially because of the fact that with such a pressure, the power supply unit does not heat up in the heat, well, the crimson is folded straight up, there are a few heats up. To that, we connect it to the big channel 5V (it’s close to 6V at once), and win quietly and not harm your work. Obviously, for fan feeding, there are options: stabilizer, resistor, etc. Nadali deyakі z them mi pobachimo.

I freely mounted the whole scheme on the zvilnenny type of non-essential parts of the mist, not rolyaches of the regular boards, with a minimum of additional charges. Everything looked like this after choosing:

Zreshtoyu, what can we do?

Vyishlo ZU with exchanges of the maximum charging stream (reaches the change in voltage, which is applied to the battery when the threshold is exceeded by 5A) and stabilized maximum voltage at a level of 14.4V, which induces voltage in the vehicle's side rail. To that yogo can be boldly victorious, not including accumulators of on-board electronics. This charger can be safely removed without looking at anything, and the battery will never overheat. Until then, it may be noiseless, but it is easier.

If you need a maximum stream of 5-7A (your battery is often very discharged), you can easily increase it to 7-10A by replacing the R8 resistor with 0.1 ohm 5W. Another power supply unit has more strained folds of 12V itself, so I zrobiv:

Option 2.

Let's come next, we will have a Sparkman SM-250W power supply unit based on a widely used PWM TL494 (KA7500).

The conversion of such a power supply unit is simpler, lower on LPG-899, since the PWM TL494 does not have any necessary protection for the elastic channels, then there is another pardon comparator, which is often a good one (like in this particular situation). The circuit was shown one to one with the PowerMaster circuit. Її I and taking as a basis:

Plan dіy:

Tse buv, maybe, the most economical option. You will have more soldered parts, lower stained J. It is especially worth noting that the SBL1040CT sample was soldered from the 5V channel, and there were soldered diodes, in their own line, from the -5V channel. Mustaches of windows were made up of crocodiles, light and savior. Well, you can still get some more for beauty and beauty.

Axis fee for total collection:

If you are fooled by manipulations with 15 and 16 legs of PWM, a shunt with a support of 0.005 Ohm, using possible circulators, you can convert the PSU to TL494 and in another way.

Option 3.

Otzhe: our offensive "victim" - PSU Sparkman SM-300W. The scheme is absolutely similar to option 2, but it can be installed on board the direct charge on the 12V channel, more solid radiators. So - from the new mi we take more, for example 10A.

This option is unambiguous for such schemes, where legs 15 and 16 ШІМ are already assigned and you don’t want to sort it out - now you can rebuild it. І tsіlkom adventitious for reshti vipadkіv.

Repeat exactly points 1 and 2 from the other option.

Channel 5V, I have dismantled the top.

To prevent the fan from running at a voltage of 14.4V - select a vuzol for VT2, R9, VD3, HL1. Vіn does not allow to change the voltage on the fan more than 12-13V. The strum through VT2 is small, the heating of the transistor can also be done without a radiator.

With the principle of dії zahistu vіd reversal of the polarity circuit of the interfacing of the charging struma and you already know, but from place of yoga connection here - else.

A signal from VT1 through R4 of institutions on the 4th leg KA7500B (analogue of TL494). It’s not shown on the diagram, but it’s the fault of the original circuit, the resistor is 10 kOhm with 4 legs to the ground, yoga don't need a chip.

Repair tse obezhennya like this. With small streaks, the transistor VT1 closes and does not flow into the operation of the circuit. On the 4th node, the voltage is on, the shards are planted on the ground through a resistor. And the axis, if the voltage surge grows, the voltage drop on R6 and R7 is obviously the same, the transistor VT1 starts to vibrate and at the same time R4 and with a resistor to the ground, the stench is adjusted to the voltage dilnik. The voltage on the 4th node increases, the potential spikes on this node, according to the description TL494, directly add to the maximum hour of power transistors, then the strum at the voltage is no longer growing. At the specified ratings, the threshold for dewatering becomes 9.5-10A. The main vіdmіnіst vіd obmezhennya vіnіantі 1, prizovnіshnіshnіshnіu similіvі, rіzka characteristic obmezhennya vіdto. when reaching the spratsovuvannya threshold, the output voltage drops quickly.

The axis of this option is at the finished look:

Before speech, qi, charging can be used as a life-changing device for a car radio, transferred to 12V and other car attachments. The voltage is stabilized, the maximum strum of the surroundings, it will not be so easy to burn.

Axis finished products:

The conversion of a power supply unit under a charger for such a technique on the right of one evening, but for yourself a beloved hour is not a Skoda?

Todi allow me to reveal:

Option 4.

The PSU Linkworld LW2-300W on PWM WT7514L was taken as a basis (an analog is already known to us for the first version of LPG-899).

Well, well: the dismantling of elements that are not necessary for us is a good idea with option 1, with the same retail, that channel 5B can also be dismantled - we don’t need wine.

Here the scheme will be foldable, the option of installation without preparation of an additional payment in this way is not an option. Even though I don’t think about it. The axis has been prepared in part by the control board, and the victim itself has not yet been repaired by the experiment:

And the axis is out after the repair and dismantling of the zayvih elements, and on the other photo with new elements and on the third one, the return plate from the already glued insulation gaskets is paid to the hull.

Those that are circled in the scheme of Fig. 6 with a green line - were selected on an okremіy board, the lines were selected on the spot, which were called out in the details.

I’ll try to find out later: what kind of chargers are blown in front of the outbuildings, and then we’ll tell you about the details, for what they say.

• The charging plug is connected only when it is connected to a new EPC socket (in this battery type), the plug is connected to the back of the line J.
• For whatever reason, the voltage on the output is overdriven by 17V, or it appears less than 9V - the memory is vibrating.
• The maximum strum charge is regulated by a changeable resistor from 4 to 12A, which allows the recommended battery charge strum from 35A/year to 110A/year.
• The charge voltage is automatically regulated 14.6 / 13.9V, or 15.2 / 13.9V fallow in reverse short-term mode.
• The voltage of the fan's life is automatically regulated by the fallow charge in the range of 6-12V.
• In case of a short circuit or a polarity reversal, the electronic protector, which is self-sustaining, on 24A, the scheme of which, with minor changes, was positioned for the design of the honorable cat for the 2010 Simurga competition. Shvidkist in microseconds is not peaceful (nothing), but the staff defender of the BP does not get mixed up - wine is richly swidshe, tobto. BP continues to practice like nothing happened, only saved the red light of the guardian’s work. Icor, when the probes are closed, it is practically not visible, wind when the polarity is reversed. So I recommend it, at my glance, I’m the best, I’m quiet, I’m bachiv (if I want a few drops on the pardon of the spratsovuvannya zocrem, you can sit with a selection of nominal resistors).

Now, who is saying for what:

• R1, C1, VD1 - reference voltage for comparators 1, 2 and 3.
• R3, VT1 - lancet for autostart of the power supply unit for the hour of connecting the battery.
• R2, R4, R5, R6, R7 - reference line dilnik for comparators.
• R10, R9, R15 - lantsyug dilnik zakhistu vіd overvoltage at the exit like I guessed.
• VT2 and VT4 with the necessary elements - an electronic sensor and a blast sensor.
• Comparator OP4 and VT3 with binding resistors - fan wrap regulator, information about the strum at the input, like a bachite, it should be connected to the strum sensor R25, R26.
• First, more important - comparators from 1st to 3rd ensure automatic control of the charge process. If the battery is to be discharged strongly and the good “ist” strum, the charger is charged in the mode of exchange of the maximum strum installed by the resistor R2 and 0.1C (for this reason, the comparator OP1 is used). When the world is charged with the battery, the voltage at the output of the charging growth rate and when the threshold reaches 14.6 (15.2), the strum changes again. Comparator BP2 enters into operation. If the strum charge falls to 0.02-0.03С (de єmnіst battery and A / h), the charger will switch to the mode of recharging with a voltage of 13.9V. The OP3 comparator is turned on and off to indicate that there is no flow to the work of the regulation circuit. Resistor R2 does not just change the threshold for the maximum charge stream, but also changes all equal control of the charge mode. In fact, with this help, the battery capacity is chosen, which is charged, from 35A / year to 110A / year, and the strum water is dehydrated with a “side” effect. The minimum hour of charge will be at the correct position, for 55A / h approximately in the middle. You ask: “why?”, so that, for example, when charging 55A / year of the battery, put the regulator at position 110A / year - it means too early transition to the stage of recharging with a reduced voltage. At strum 2-3A, deputy 1-1.5A, it was like a retailer, tobto. me. And when exposed to 35A / year, there will be a small cob strum charge, a total of 3.5A instead of 5.5-6A. So if you don’t plan to walk around constantly and turn the adjustment knob, then insert it like the next one, so it will not only be more correct, ale and smarter.
• Vimikach SA1 at a closed station to transfer the memory in the "Turbo / Winter" mode. The voltage of the other stage of the charge moves up to 15.2, the third one is left without any changes. It is recommended for charging at minus battery temperatures, to a filthy yogo station or during a non-stagnant hour for a standard charge procedure, it is often not recommended to charge with a good battery, because it can be negatively recognized by the term of yogo service.
• Light helps to orientate, at which stage there is a charge process. HL1 - spalahuє when reaching the maximum allowable strum charge. HL2 is the main charge mode. HL3 - transition to recharge mode. HL4 - shows that the charge is actually finished and the battery lasts less than 0.01C (on older or less than the best batteries, you can’t reach this moment, so check it out for a long time). In fact, the battery is already well charged after the HL3 is ignited. HL5 - spalahu when spratsovvanni electronic zabіzhnik. To turn the guard at the exit camp, to do it quickly turn on the switch on the probes.

What a pleasure. Do not connect the control board, or do not solder the resistor R16 in it with the selection of R17 to reach a voltage of 14.55-14.65 at the output. Let's choose R16 in such a way that in the recharging mode (without charging) the voltage dropped to 13.8-13.9V.

I will attach the axis of the photo to the selected view without the case and in the case:

Axis, vlasne, and that's it. Charging was tested on different batteries, adequately charging both car and UPS (I want all my chargers to be charged at 12V normally, because the voltage is stabilized J). Ale tse shvidshe and fear nothing, no short circuit, no polarity reversal. Well, it’s true, on the front view, you don’t see the BP vikoristovuvaty (it’s already out of the way to twist the process and you don’t want to get in the way of the voltage at the input). Then, yoga can be used as a charger for backup batteries, without turning on any of them. The charge time is fallow at the level of the discharge automatically, and through a small voltage in the mode of recharging the source battery, you will not bring it to the battery when it is constantly boosted. If the battery is no longer charged, it is possible for the charger to switch to a pulsed charge mode. Tobto. strum charging is pulsing from 0 to 2A with an interval of 1 to 6 seconds. On the back of the head, I wanted to take the sight, but, having read the literature, I understood what it was good to instill. The electrolyte is more likely to mix up and induce different sprays to restore the spent capacity. To that virishiv deprive yak є.

Option 5.

Well, axis, it was trapilos newcomer. This time LPK2-30 with PWM on SG6105. I have never had such a “beast” for processing before. Ale, I guessed the numerical supply on the forum and the skargi of coristuvachiv on the problems of rebuilding blocks on the next m / s. I praised the solution, even though charging is less and not needed, it is necessary to overcome the m / s for the sake of sports interest for the sake of people. And at the same time, try it out in practice, which vibrated in my head the idea of ​​an original way of indicating the charge mode.

Axis of wines, with a powerful person:

Pochav, how to start, I will describe the recovery. Having shown that it is similar to LPG-899, but there are acts of authority. The presence of 2 vbudovannyh TL431 on board, rіch, zvichayno, tsіkava, ale ... for us - nesuttєva. And the axis of power in the lance to control the voltage of 12V and the appearance of an input for the control of negative voltages makes our task easier, but in reasonable boundaries.

As a result of reflections and non-trivial dances with a tambourine (where else without them) the following project was born:

The axis of the photo of this block has already been converted to one channel 14.4V, yet without payment for indication and control. On another yogo return bik:

And for the insides of the block in the collection, that ovnishnіy look:

To pay attention, that the main board was cut by 180 degrees, due to its cob rotation, so that the radiators did not care about the installation of the elements of the front panel.

Zagalo tse trohi of forgiveness option 4

• As a dzherelo for the formation of "fraudulent" voltages at the control inputs, 15V was taken from the life of the transistors. It's in the kit with R2-R4 to do everything you need. R26 for negative voltage control input.
• The reference voltage for the comparator equals was taken as the voltage of the drawing, the SG6105. For great accuracy is not necessary for us.
• Adjustment of the fan revolutions can also be done.

And the axis of indication was a bit modernized (for diversity and originality). Virishiv robiti behind the principle of a mobile phone: a jar that reminds me of it. For which I took a two-segment light indicator with a glowing anode (the scheme of verification is not required - you don’t know the library element, but you need to draw a molt L), and the switch is shown in the diagram. It didn’t seem like it was conceived, instead of that, the average gas “g” under the regime of freezing, the stream of charge was extinguished, it was like stench flickering. Otherwise, everything is fine.

The indication looks like this:

On the first photo, the mode is charged with a stable voltage of 14.7V, on the other - a block near the mode of exchange of the stream. If the strum becomes low, close the upper segments of the indicator, and the voltage at the output of the charger is up to 13.9V. Tse can be better in the photo, induced by the trochs more.

So, as the voltage at the rest stage is only 13.9V, you can safely recharge the battery like a year before, if you don’t bring it to you, give the car’s generator a bigger voltage.

Obviously, in this variant it is possible to win the control board from option 4. The GS6105 connection is only necessary to work like this.

So, not forgetting a little. Resistor R30 install it yourself - it's not obov'yazkovo. Simply, I didn’t manage to change the rating in parallel to R5 or R22, in order to take the voltage off at the output. Axis and wyvernivsya such ... unconventional rank. You can just pick the ratings R5 or R22, as I'm working for other options.

Pushing laboratory impulse block of life.

Main technical characteristics:

Output voltage, at current surge 10A....... 0...22V
Stabilization coefficient....... 200...300
Pulsation voltage, no more....... 200mV
Weekend Opir....... 0.20m
in the mode of stabilization of the strum
Outdoor strum, ....... 0... 10A
Pulsation voltage, no more....... 300mV
Controlling the TL494 microcircuit is possible through the visnovok 4 , And vbudovani operatives vіdkljaєmo. The whole scheme of the block of life works steadily, without disturbing that re-adjustment. Ale obov'yazkovo pіdіbrati lanceug correction C4 and C6.

For which it is connected to the output of the block, the main choke of the group stabilization without intermediary +12 volt winders. Become an oscilloscope and marvel at what comes out. If you replace the post-processing process, then the correction is not fixed, it is necessary to continue the fixing.

На мікросхемі ОУ LM324 (або будь-який інший счетверенный низьковольтний операційник, який може працювати в однополярному включенні і при вхідних напругах від 0V) зібраний вимірювальний підсилювач вихідної напруги та струму, який даватиме вимірювальні сигнали на TL494 через висновок 4. Резистори R8 і R12 задають reference voltage. Change resistor R12 regulates the output voltage, R8 - strum. Strumovimiryuvalny resistor R7 at 0.05 ohm is to blame for the intensity of 5 watts (10A ^ 2 * 0.05 ohm). Life for the op-amp is taken from the output of the "chergovy" 20V ATX ​​PSU.
Show respect, your block had Y-capacitors. Without them, there is a lot of noise at the output of the block, and the regulators of the stream and the voltage work badly.

It is most heated during the day when it is folded, so the fan is overwhelmed. The life for the fan is taken from the dzherel with a voltage of 25V, like to live TL494, it is lowered by the stabilizer 7812 and it is fed to the fan.

It’s better to install yoga in such a way that it will open the middle of the body. Navantage resistor 470 ohm 1W.
Like a voltmeter and an ammeter, you can turn it on either with a needle attachment, turn on like a sound, or a digital voltammeter, like you need to connect to a shunt or LM324 output (leg 8 - voltage, leg 14 - jet) and use a tester. You can live digital voltmeters from worm 5V - there you can convert to 2A 5V.
If you don't need to adjust the stream, then the R8 is simply twisted to the maximum. Stabilization of the PSU will be like this: if, for example, 15V and 3A are installed, then if the voltage surge is less than 3A - the voltage will stabilize, if more - then the stream.

Indication of the indicator following the classic PV2 scheme.

Pay the management of the living block the same for all living blocks.

R
regulation up to 150V іpulsny laboratory block of life.
Main technical characteristics:
in the voltage stabilization mode
Output voltage, at surge voltage 1A........ 0...150V
Stabilization coefficient ............................................... 100...200
Pulsation voltage, no more ............................... 1000mV
Outside Opir .............................................. 0.80m
in the mode of stabilization of the strum
Outside strum.................................................. ......................................0... 1A
Pulsation voltage, not more than ............................... 1000mV

Scheme yak at the front part, and also add a transformer, and replace two diodes, put a place on some UF304, output capacitors 200V 220uF. Navantage resistor 4.7 to 1W.

The transformer has a split plate, and all the windings are connected sequentially, saving the phase.

Changes on the control board R3 on the 100kOhm.

BP laboratory.

Behind the scheme, everything is visible, to that about special features.

Less details are shown, if they were changed or were added, the grating did not stick.

Actual details without positional designations are labeled in the shortest possible scheme.

We solder less than a few parts that block the robot block due to the presence of a minus voltage.

In the block, the vipryamlyach was replaced with a mist s 2D213A.

Throttle group stabilization of rewinds with a larger drotom.

Voltage regulation - for additional change of reference voltage from zero to +5V. The dilnik at the lances stabilizes the voltage of the resurfacing so that with a reference voltage of + 5v, the output voltage increases to 42v. Adjustment of the voltage stream - also for additional change of the reference voltage from zero to + 5V. Yak sensor struma vikoristany vbudovaniya in the ammeter shunt.

The block allows you to regulate: release the voltage in the boundaries ……. 1...41V exit stream at the boundary ……. 0.1...11A. The maximum value of the struma is limited by the ammeter capabilities - 10A. With a stream (6A), the voltage can be set up to 41V, and with a smaller voltage (22V), the stream of surroundings is 11A. "Duty" vikoristovuєtsya - the name is shown constant voltage + 5V. Insha "duty" voltage (22V) to live ms PWM controller (TL494) and fan.

 Charger on the basis of the PC life block

Z a row attachment from the block of life of the PC to the exhaustion of 200 W.

Necessary changes for the connected III controller and additional elements are shown on the diagram, the numbering of the elements of the diagram is saved. Resistor R1 with a support of 4.7 kOhm, which is connected to the back of the 1 DA1 controller with a +5V lance, it is necessary to solder, the 16 wires are connected to the wire rod, and the jumper, which is connected to the wires 14 and 15, can be seen. In addition, next soldering and sawing the darts of the outer lances -12V, -5V, +5V and +12V.

Let's see how it is shown on the diagram. For whom, in the necessary places, the paths of the drucovano payment are cut and soldered to them with the necessary elements.

The maximum output of the charger will be approximately 6.5A. The charging jet is installed with a change resistor R10. In the world of charging, the voltage on the battery, increasing, approaches to the boundary, which is indicated by the resistive dilator R1R2, and the strum changes according to the set value to zero. When the battery is fully charged, it will switch to the mode of stabilization of the output voltage, ensuring the compensation of the struma to self-discharge. I’ll adjust the adjustment near the additional resistor R1, so that the idle voltage at the middle position of the handle for installing the struma was adjusted to 13.8 ... 14.2V.

Block Live on PWM - controllers SG6105 and DR-B2002

In the rest of the years, the monopoly of the controller TL494, and its analogues from other companies:
DBL494 - DAEWOO;
КА7500В – FAIRCHILD (http://www.fairchildsemi.com);
KIA494 - KEC (http://www.kec.co.kr)

IR3M02-SHARP

A494 - FAIRCHILD

KA7500 - SAMSUNG

MB3759 - FUJITSU etc.

I began to break down the number of microcircuits of other types, for example, such as:

KA3511, SG6105, LPG-899, DR-B2002, 2003, AT2005Z, IW1688 and others. Blocks tsikh MC replace less discrete elements, lower urged to improve TL494.

SG6105 microchip builder from Taiwanese company SYSTEM GENERAL, on its website (http://www.sg.com.tw) you can find a short technical description for this microchip.

With the DR-B2002 microcircuit it is more foldable - searching for information about it on the Internet does not give anything.
MS IW1688 behind the visnovki is identical SG6105, І nayіmovіrnіshe є її povny analogue.

MS 2003 і DR-B2002 for the visnovkas they are more likely to go, practically the stench is mutually interchangeable.

The table has a sign, a number and a functional description of the fittings of both microcircuits.

Appointment	SG6105	DR-B2002	The function to win
PSon	1	2	Input to the PS_ON signal, which is handled by the IP robot: PSon=0, ІП inclusions, present all external voltages; PSon=1, ІП switching, є only chergovy voltage +5V_SB.
V33	2	3	Voltage input 3.3V.
V5	3	4	Voltage input 5V.
OPp	4	-	Entry for the organization of the transition of the reworking ІП in the case of the relocation of the constricted tension (superior struma / short circuit in the reworking).
UVac	5	-	Input for organization of control over the decrease in the level (calculations) of the input life-sustaining voltage.
Nvp	6	-	Input for organization of control over negative output voltages.
V12	7	6	Voltage input 12V.
OP1/OP2	9/8	8/7	Turn off the control of the two-stroke nap_bridge turn IP.
PG	10	9	Exit from the collector signal P.G. (Power Good): PG=0, one or more output voltages IP do not meet the norm; PG=1, output voltages ІП are at the given boundaries.
fb2	11	-	Ceramic zener diode cathode 2.
Vref2	12	-	Ceramic electrode of ceramic stabilitron 2.
Vref1	13	11	Ceramic electrode of ceramic zener diode 1.
Fb1	14	10	Ceramic zener diode cathode 1.
GND	15	12	Zagalniy provіd.
COMP	16	13	Exit pіdsilyuvacha pardon and negative input comparator ShІM.
IN	17	14	Negative input of the pidsiluvach pardon.
SS	18	15	Positive input for the pardoner of connections to the internal dzherel Uref=2.5V. Vykoristovuetsya in the organization of "soft start" reworking.
Ri	19	16	Input for connection of external resistor 75k?
Vcc	20	1	The voltage of life is connected to the cherg dzherel + 5V_SB.
PR	-	5	Entry into the organization of defense of IP.

Specifications DR-B2002 VID SG6105:
DR-B2002 can have one zener diode (wires 10, 11), similar to TL431,

SG6105 may be in its warehouse, there are two such stabilitrons (visnovki 11, 12 and 13, 14);

DR-B2002 may one visnovka for organization of competition IP - PR (5 vysnovok),

SG6105 has three such veins - OPp (4 veins); UVac (visnovok 5); NVp (visnovok 6).

Figure 1 shows the switching circuit SG6105.

The voltage Vcc (20) on the SG6105D MS should be set to +5V_SB. The sum of the output voltages IP +5Vі +12V sumator of decoctions on resistors R101-R103 1% accuracy. Kerovany zener diode 1 MC is vicorated at the circuit of the optocoupler tie-in in the neck of the voltage +5V_SB, the other zener diode is victorious in the circuit for stabilizing the output voltage IP +3.3V.

The voltage from the input of the primary winding of the transformer T3 is on a single-phase rectifier D 200C 201, and through the dilnik R200R201 to see OPp (4), and it vibrates as a signal of the shifting of the tightness of the latent tension in the double-stroke bridge switch IP (for example, in times of short circuit on the IP outputs).

On the elements D105, R122, R123, connected before the NVp (6) was introduced, there was a circuit for monitoring the negative output voltage IP. The voltage from the cathode of the double diode is the rectifier of the output voltage +5V, through the resistor R120 go to the input UVac (5), and vicorate to control the input life-changing voltage IP.

The control circuit for a double-acting double-acting switch IP, is behind a standard double-acting circuit on transistors Q5, Q6 and transformers T3.

To live the circuit, the winding of the transformer in the choke mode T2 is used, the voltage is increased from the output of the single-phase rectifier D21C28, the lance R27C27 is damping.

Figure 2 shows the connection diagram DR-B2002 or 2003 .

Bo for organization of zahistu at the microcircuit DR-B2002 If there is only one PR (5) winding, then the wines are victorious at once to organize the protection against the displacement of tension, which helps to reduce the pressures of the two-stroke nap_bridge reversal ІП, and to control the negative external voltages of the BPZh.

The signal, the ratio of which is proportional to the tension of the damping of the switch IP, is taken from the middle point of the primary winding of the branched transformer T3, then through the diode D11 and the resistor R35, go to the short lanyard R42; R43; R65; C33 PR microcircuits. The control of negative output voltages is controlled by auxiliary elements R44, R47, R58, R63, D24, D27.

Shards at the DR-B2002 warehouse there is only one stabilitron, which is broken at the voltage stabilizer circuit +3.3V, at the circuit of the optocoupler locking link at the power supply +5V_SB vikoristovuetsya okremiya kerirovaniya stabilitron TL431.

Scheme of stabilization of the output voltage + 3.3V, which vikoristovuetsya in DBZh (Fig. 3) to avenge the pardon on the ceramic stabilitron, which enters the warehouse of the SG6105D microcircuit.

The voltage at the input should be connected to the output of the DBZh + 3.3V through the dilnik R31R32R33, the power switch of the pardon controls the Q7 bipolar transistor of the KN2907A type, which ensures the formation of the so-called “discount stream” through a special choke L1, switching on the double-pulse transformer in the second voltage + 3.3V - double Schottky diode D9 type MBR2045CT.

Under the blower of the folding strum, the choke L1 enters at the station of supply, with which the inductance changes, the opir of the choke to the change strum will change.

Once, if a discount of a chin -brim, abdest, drosel l1 maximum venuctiveness, I viddov is the maximum maximum of the OPIR to the serpentous strap, at the same time, the zoom is overwhelmed by the Smileda +3.3V, I vidbuvyu, the zmensny napri is 3v 3v. A similar scheme allows, with a small number of stagnant elements, to regulate (stabilize) in a lance with a very solid outlet stream (for example, for IP LPK2-4 300W for a lance +3.3V it is declared - 18 Amperes).

A simplified re-verification of the microcircuit descriptions can be carried out in the following manner: on the Vcc wires, when the GND is connected, a live voltage signal (5V) is applied, with a short-hour switching on the SS and Vcc wires of the microcircuit, on the OP1 and OP2 outputs, a direct pulse can be used with an oscilloscope. It is less important to note that this method does not allow reversing the lancet vmicanya (PSon), forming the PG signal and in.

In the process of ceramic coating, the stabilitrons of microcircuits are tested as primary, discrete TL431.

How to reconsider the next opir shunt?

In \u003d (Uop / (R2 / R1 + 1)) / Rsh

For example, go like this:

Yakscho:
Uop = 5V (reference voltage);
R2 = 10KΩ;
R1 = 0.27 KIM;
Rsh = 0.01 Ohm

Those:
In \u003d (5V / (10KΩ / 0.27KΩ + 1)) / 0.01Ω \u003d 13A

Submit your data and take the values ​​of the resistors.

The size of one, of which ask a double ...

MS PWM controller LPG899 PSU ATX

The LPG 899 microcircuit ensures the following functions:

Formation of signals for keruvannya by power transistors of a push-pull converter;

Control of the output voltages of the live block (+3.3v, +5v, +12v) for movement, as well as the presence of a short flicker in the channels;

Zakhist in the form of a significant change in the voltage;

-control of negative voltages to the block of life (-12v and -5v);

Forming a Power Good signal;

Control of the remote switching signal (PS_ON) and start of the block of life at the moment of activation of the signal;

Safeguarding the "soft" start of the block of life.

Vikonan microcircuit in a 16-pin package (Fig. 1). As the voltage of the life is energized + 5V, which is vibrated by the heart of the life (+ 5v _ SB). Zastosuvannya LPG 899 allows you to forgive the circuitry of the living block, because. The microcircuit is an integral part of some of the main modules of the core part of the life block, and itself:

PWM controller;

Lance to control external voltages:

Forming circuits for the Power Good signal;

Scheme to control the signal PS _ ON and in the remote start of the block of life.

The functional diagram of the LPG 899 PWM controller is shown in Fig. 2.

Description of contacts of the PWM controller and its main features of functioning

be directed at Table 1.

№	Nameniv.	Entry Exit	Description
1	V33	Enter	Input voltage control channel +З.ЗВ. Through the contact, there is a voltage shift in the channel and a decrease in voltage (which causes a short flicker in the voltage channel). Contact without intermediary calls from channel +З.ЗВ. І voltage shift, and short flickering lead to blocking of the output impulses of the microcircuit. The input impedance to the contact should be 47 kOhm.
2	V5	Enter	Input to the control of the voltage channel + 5V. Through the contact, there is a voltage shift in the channel and a decrease in voltage (which causes a short flicker in the voltage channel). Contact without intermediary connection with +5V channel. І voltage shift, and short flickering lead to blocking of the output impulses of the microcircuit. The input impedance to the contact should be 73 kOhm.
3	V12	Enter	Input voltage control channel + 12V. Through the contact, there is a voltage shift in the channel and a decrease in voltage (which causes a short flicker in the voltage channel). The voltage of the +12V channel is applied to the entire contact through a resistor that is between. As the voltage is shifted, and a short flicker in the +12V channel leads to blocking of the output impulses of the microcircuit. The input impedance to the contact should be 47 kOhm.
4	RT	Enter	Entry to hell. The contact can be changed in a different way depending on the practical scheme of inclusion. This input signal allows you to protect against extreme voltage surges (so the contact potential is lower than 1.25V) or it allows you to block the operation of the protection from short circuits (so the contact potential is lower than 0.625V). The input impedance to the contact should be 28.6 kOhm.
5	GND	life	Zagalny for lansyug lively and logical part of the microcircuit
6	ST	-	Contact for connecting a frequency capacitor. At the moment the microcircuit is energized, on this contact, a sawtooth voltage is generated, the frequency of which is determined by the capacity of the connected capacitor.
7	Z 1	leave	Exit the microcircuit. Impulses are generated on contacts with trivality, which changes. The impulses of this contact are transferred from the antiphase of impulses to terminal 8.
8	C2	leave	Exit the microcircuit. Impulses are generated on contacts with trivality, which changes. The pulses of this contact are transferred to the antiphase of the pulses on pin 7.
9	REM	Enter	Input to the remote control signal PS_ON. Set a low level to this contact before starting the microcircuit, and start generating pulses on pin 7 and pin 8.
10	TPG	...	A contact for connecting a capacitor, which indicates a time delay when a Power Good signal is formed.
11	PG	leave	Output signal Power Good - PG (life is normal). Setting a high level on this contact means that all voltage outputs of the power supply unit are within the allowable range .
12	DET	Enter	Detector input that controls the Power Good signal. This contact can, for example, be broken to prevent the PG signal from dropping to a low level when the primary line fails.
13	VCC	life	Life voltage input +5V
14	OPOUT	leave	Vihіd vnutrishny pіdsilyuvacha pardon.
15	OPNEGIN	Enter	Іnvertuyuchy entry pіdsilyuvacha pardon. This internal pardoner adjusts the OPNEGIN signal to the VADJ signal on pin 16. The internal contact is disturbed by a value of 2.45 of the reference voltage. This contact is also vikoristovuetsya for the connection of the ovnіshny compensating lancet, which allows you to turn the frequency response of the closed loop of the zv'yazku pіdsilyuvacha.
16	VADJ	Enter	The entrance of the internal pardon, which is not inverted. The most typical type of contact is the control of the combined signal of the return link of the channels + 5V and + 12V. To change the potential contact to change the frequency of output impulses of the microcircuit, tobto. Through this contact, the stabilization of the external voltages of the block of life is stabilized.