Hi everyone, who has an idea on how I can use the normal H Bridge FET, switches for my battery charger and inverter application. I want to use the two in a sine wave offline UPS. The machine I am currently using is a PIC16F72 micro controller. How do I go about this? Thanks for the answer.
Hello Sd,
H Bridge FET is very common in backup power supplies like UPS etc specially in sine wave inverters same MOSFET bridge can be used for converting DC to AC via Transformer as well as battery charging at the same time. Transformer winding is must connected to the bridge in short the main purpose of using it is keep parts count as well as circuit complexity down.
Usually all MOSFETS with N-channel are used because the same H-Bridge is used for inverter. Upper two MOSFETS are driven by high side drives remember during charging this does not matter. The lower two MOSFETS are driven at different cycles according to the current required. The four switches of H Bridge are switched using sine wave during inverter operation PWM signals generated using analog circuit or micro controller.
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