H Bridge inverter power stage with passives

 

The above circuit I got from replies from edaboard. I had created a thread there on how can I drive a 2 pin primary transformer with H bridge configuration with my SG3524 PWM circuit. I got many replies to use dedicated driver ICs, suggestions to use floating high side gate driver, etc. But I simply needed a solution to run it with circuit made of passive and discrete components and alertlinks gave me this circuit.

This circuit generates a 24V supply from the 12V battery voltage and makes the required high voltage to drive the upper FETs.

The 24V supply is made by a charge pump circuit. In the first two signals from teh SG3524 IC,the alternate 100uF/25V capacitors get charged and it works.

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9 Responses

  1. Onyi says:

    man that circuit can not work fine the positive fet must bridge with the negative fet,because of the driver,the driver must be on hbridge first with NPN AND PNP transistors

  2. Onyi says:

    man that circuit can not work fine the positive fet is going to bridge with the negative fet and get bont,because of the driver,the driver must be on hbridge first with NPN AND PNP transistors.

    When i was a beginner on inverter job i did things like this,it doesn’t work perfect.I have my own inverter company now in Nigeria which my products are now in the market.pure sine wave hbridge inverter design with PRC PROGRAMMED IC not sg3524

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