Sine wave power inverter ac output fluctuate between 210~230V. Any idea what is going wrong?
Recently build 300w sine wave inverter. First power on without heatsink it fried off push pull mosfet. Replace mosfet and attached heat sink, repower blown fuse and output mosfet shorting. Replace fuse and mosfet, power up again. Resulting with fluctuating output between 210VAC to 230VAC. Check secondary dc voltage also fluctuated. Any idea what was went wrong. Use KA7500 as input driver and egs002 as output driver.
Reference - please refer https://www.instructables.com/id/Ectable-PCB-With-Eagle/
Thanks in advance.