12v 300w inverter circuit structure and principle analysis Power board main components: the power board includes a pre-reverse polarity protection, DC-DC step-up push-pull, H-bridge inverter and rectifier filter section also includes over-current protection circuit, a quasi-closed loop feedback section and under small portion of voltage alarm circuit. (See Detailed EG8010 SPWM chip data sheet) ģ. The stage driver board is composed of three parts: generating (SCM EG8010) SPWM signal portion, the driving portion of the IR2110, and over-current protection section. The pre-driver board is mainly composed by three parts: the power supply section, PWM driving portion and over-voltage protection section Ģ. This inverter is composed of three parts: pre-driver board, stage driver board and power board.ġ. Overall, this is a uni-polar 12V isolating pure sine wave inverter. Under-voltage protection 10V immediate shutdown over-voltage protection 15V immediate shutdown overheat protection: 65℃. Overload protection 500W immediate short circuit protection voltage alarm 10.3V delay 1.5S Overall efficiency: 87% 300 times the power short-circuit, short-circuit power 200 times Output voltage: Output single phase 220VAC (RMS), a frequency of 50☑Hz. Nominal power: 300W continuous power: 250W Peak power: 600W 12v 300w uni-polar isolation of pure sine wave inverter Basic parameters
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