The absolutely available switch power supply: Kaige 4C7108 power supply

Published:2011/6/10 1:15:00 Author:Seven | Keyword: power supply, Kaige | From:SeekIC

The 5-pin is the power supply pin of TDA8380. The external C530, which is linked by the 10-pin, and the internal circuit, they both form a sawtooth wave oscillator. 6-pin links with an external R522, and the set parameter current provides charging/discharging current of C530, so the oscillator frequency of TDA8380 is decided by R500 and C530, the frequency of this machine is 34KHZ. The forward/backward motivating current, which is output by 1-pin and 15-pin of TDA8380, is delivered to the B pole of switch pipe Q502, so that Q502 is in the working state. It's to stop Q502 quickly to use backward motivation.



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