400W inverter circuit

Published:2011/7/18 21:42:00 Author:TaoXi | Keyword: 400W, inverter | From:SeekIC

The voltage stabilization sampling and error amplification system is composed of the pin-1 and pin-2, the positive phase input port pin-1 inputs the 15V DC voltage which is rectified and output by the inverter sub-sampling winding, and this 15V DC voltage is divided by R1 and R2 to supply the 4.7～5.6V sampling voltage to the inverter. The reverse phase input port pin-2 inputs the 5V reference voltage which is output by the pin-14. When the output voltage decreases, the voltage of pin-1 decreases too, the error amplifier outputs the low level to rise the output voltage through the PWM circuit. The voltage of pin-1 is 5.4V, the voltage of pin-2 is 5.0V, the voltage of pin-3 is 0.06V. At this time the output AC voltage is 235V (square wave voltage).



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