Does the IR21X series have a half-bridge driver chip with an output phase difference of 180°?

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Does the IR21X series have a half-bridge driver chip with an output phase difference of 180°? [Copy link]

 

The IR2104 is used now, which has complementary output. Does the IR21X series have a half-bridge driver chip with an output phase difference of 180° and an adjustable duty cycle? The purpose is to drive a high-voltage package.

maychang

『Does the IR21X series have a half-bridge driver chip with an output phase difference of 180° and an adjustable duty cycle? 』

It seems that there is none. There are only two-way input chips for high-end and low-end, such as IR2112, and even three-way input chips, such as IR2137. But there is no driver chip that can do both frequency division and duty cycle control for you.

maychang

maychang posted on 2021-7-19 09:03 "Does the IR21X series have a half-bridge driver chip with an output phase difference of 180° and an adjustable duty cycle? " It seems that there is no. There are only high-end and low-end...

The duty cycle and dead time are something you need to control yourself. You can first use a power control chip such as TL494, UC3525, etc. to generate two control signals, and then use the IR21XX chip to drive them.

maychang

Remember that you want to make a 25kV DC high voltage power supply, why not use a single-ended flyback circuit?

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maychang posted on 2021-7-19 09:07 Remember that you want to make a 25kV DC high voltage power supply, why not use a single-ended flyback circuit?

Yes, an experiment I did before can output 30KV high voltage. But it needs an adjustable output voltage switching power supply to power the HV. I want to remove the switching power supply. Use 310V rectified from 220V directly, and then adjust the output high voltage through the duty cycle! Last time you said that the voltage doubler rectifier circuit has little to do with the duty cycle. I want to do a practical experiment!

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maychang posted on 2021-7-19 09:07 Remember that you want to make a 25kV DC high voltage power supply, why not use a single-ended flyback circuit?

Another thing is to make it into a flyback type. How to analyze the voltage doubler rectifier circuit behind it? Doesn't the flyback type only conduct in one direction? There are high-voltage packages that directly output DC high voltage!

maychang

Will the program be published on 2021-7-19 09:48 Also, if it is made into a flyback type, how to analyze the voltage doubler rectifier circuit behind it? Doesn't the flyback type only conduct in one direction? There is a kind of direct output...

In a flyback switching power supply, the transformer secondary voltage is asymmetric, and the amplitudes in the forward and reverse directions are not equal (they can differ by many times), so it is not suitable to use a voltage doubler rectifier circuit.

maychang

Will the program be published on 2021-7-19 09:48 Also, if it is made into a flyback type, how to analyze the voltage doubler rectifier circuit behind it? Doesn't the flyback type only conduct in one direction? There is a kind of direct output...

"There is a high-voltage package that directly outputs DC high voltage!"

Directly outputting DC high voltage is nothing more than encapsulating the rectifier tube inside the transformer. In fact, the rectifier tube in this high-voltage package is a lot of diodes connected in series.

This type of high-voltage package was originally used in cathode ray tube color televisions and uses horizontal scanning reverse pulses to generate DC high voltage.

maychang

Will the program be published on 2021-7-19 09:48 Also, if it is made into a flyback type, how to analyze the voltage doubler rectifier circuit behind it? Doesn't the flyback type only conduct in one direction? There is a kind of direct output...

"There is a high-voltage package that directly outputs DC high voltage!"

The horizontal scanning circuit of a television generates a DC high voltage, and its operation is somewhat similar to that of a flyback switching power supply.

maychang

Will the program be published on 2021-7-19 09:40 Yes, an experiment I did before can output 30KV high voltage. But I need an adjustable output voltage switching power supply to power the HV. I want to switch...

"You said last time that the voltage doubler rectifier circuit has little to do with the duty cycle. I want to try it out in practice!"

Is there no need for actual experiment?

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maychang posted on 2021-7-19 09:58 "There is a high-voltage package that directly outputs DC high voltage! " The TV line scanning circuit generates DC high voltage, and its operation is somewhat similar to the flyback switch...

If I use this high-voltage package to make a flyback, can the duty cycle control the output high voltage? Removing a switching power supply and a voltage doubler rectifier can reduce the volume a lot.

maychang

Will the program be published on 2021-7-19 10:02 If I use this high-voltage package to make a flyback, can the duty cycle control the output high voltage? Removing a switching power supply and a voltage doubler rectifier can reduce the volume a lot...

This high-voltage package is made into a flyback type, and the duty cycle can be changed to control the high-voltage DC output. But it should be noted that:

1. Can the high-voltage package and rectifier tube withstand 25kV voltage?

2. Are there filter capacitors that can withstand 25kV DC voltage?

3. Is the 25kV DC high voltage output grounded with the control circuit? If grounding is not allowed, it is very troublesome to measure the high voltage.

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maychang posted on 2021-7-19 10:17 This high-voltage package is made into a flyback type, and the duty cycle can be changed to control the high-voltage DC output. But it should be noted: 1. Can the high-voltage package and the rectifier tube withstand 2 ...

Since a high-voltage package like this directly outputs DC, there is no need to add an external filter capacitor.

The voltage detection circuit is common ground

This output is 25KV. If you want a higher voltage, you can connect two high-voltage packages in series.

maychang

Will the program be published on 2021-7-19 11:15 For a high-voltage package like this that directly outputs DC, there is no need to add a filter capacitor externally. The voltage detection circuit is the output of the common ground...

"For a high-voltage package like this that directly outputs DC, there is no need to add a filter capacitor externally."

All I can say is: give it a try.

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maychang posted on 2021-7-19 12:00 "For a high-voltage package like this that directly outputs DC, there is no need to add a filter capacitor externally. " I can only say: give it a try.

This circuit is an electrostatic generator made of UC3525ADWTR. The same-name terminal of the high-voltage package (T1) in the figure may not be as shown in the figure. I am not sure. The G pole of the MOS tube is driven by OutPutA of UC3525ADWTR, and OutPutB is empty. The output voltage can be changed by changing the duty cycle.

maychang

Will the program be published on 2021-7-20 09:06 This circuit is an electrostatic generator made of UC3525ADWTR. The same-name end of the high-voltage package (T1) in the figure may not be as shown in the figure. I can't...

"This circuit is an electrostatic generator made with UC3525ADWTR."

Isn't this going back to the voltage doubler rectification solution?

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maychang posted on 2021-7-20 10:19 "This circuit is an electrostatic generator made with UC3525ADWTR." Isn't this going back to the voltage doubler rectification solution?

Yes, that's right. The transformer is very small. The primary is powered by 24V, and the duty cycle can be adjusted to a maximum of 50KV. Can you analyze this circuit?

In fact, my ultimate goal is to adjust the output voltage through the duty cycle, and the high-voltage winding should not be too complicated. The above solution just meets my requirements. So I plan to refer to this to do the experiment

maychang

Will the program be published on 2021-7-20 10:32 Yes, that's right. The transformer is very small. The primary is powered by 24V, and the duty cycle can be adjusted to a maximum of 50KV. Can you analyze this circuit...

"In fact, my ultimate goal is to adjust the output voltage through the duty cycle, and the high-voltage winding should not be too complicated."

The transformer picture posted on the 13th floor is a ready-made transformer, already wound and packaged, so it is not complicated at all.

maychang

Will the program be published on 2021-7-20 10:32 Yes, that's right. The transformer is very small. The primary is powered by 24V, and the duty cycle can be adjusted to a maximum of 50KV. Can you analyze this circuit...

The MOS power tube and driving circuit used in the transformer on the 13th floor are roughly the same as those on the 15th floor. Only the transformer and rectifier circuit have been changed. The transformer on the 13th floor is much simpler and smaller than the pile of diodes, capacitors and resistors on the 15th floor.

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maychang posted on 2021-7-20 10:48 Will the program be posted on 2021-7-20 10:32 Yes, that's right. The transformer is very small. The primary is powered by 24V, and the duty cycle is adjusted to output the maximum...

Well, don't worry about it! .

Sorry for the trouble. Thank you.