SG 3525 PWM ic based Power Inverter – Circuit and PCB

The sg 3525 ic is a PWM producing ic. That could be available in all electronics shops with the cheapest price. The ic will cost you around 70 Rupees in the Indian market. check the Sg 35 25 pinouts here. it a 16 pin package and the ic it having the automatic shutdown and soft start feature. The single chip can be also used in the power motor speed controller as PWM DC motor speed controller

Pinout of SG 3525

The pin 1 – inv input pin 9 – compensation

The Pin 2 – Non inverting input pin 10 -shutdown

The pin3 – sync pin 11 – output A

The pin4 -oscillator output pin 12 – ground

The pin5 – ct pin 13 – vc

The pin6 – ct pin 14 – output b

The pin7 – discharge pin 15 – Vcc

The pin8 – soft start pin 16 – Vref

In this Article, I am going to explain how to make a 1500 watts inverter Using the ic SG 3525. The driver board circuit and The PCB layout I am given in the youtube video. This Driver board is enough For the power inverter construction. probably the inverter can power up by increasing the number of MOSFETs. the best choice is P60N06 N channel MOSFETs.The P60n06 works with 60v and it will take the 60 amp.

as a result, the series of 1 mosfets will provide 120 Watts output

The working voltage is 24 v DC

and one mosfet power is 120 watts

so, we want 1500 watts output , at least 12 mosfet must be needed to get 1500 watts

To produce 1500 watts how much ampere we need to supply from a 24 v battery?

Therefore, power = volt *ampere

power/volt = ampere

1500/24 = approximately 63 ampere we need.

then we conclude that 63-ampere working Transformer we need for getting 1500 watts from the 24-volt transformer.