Boosting Switching-Regulator Power Circuit Composed of 555

Published:2011/9/8 6:14:00 Author:Felicity | Keyword: Boosting, Switching-Regulator Power Circuit | From:SeekIC

In the circuit, BG1 is the switch-adjusting transistor; operational amplifier IC1 composes the comparison amplifier; 555 time-base circuit is connected as astable multivibrator. The saw-wave voltage produced by the oscillator on C1 (Vmin=1/3Vz, Vmax=2/3Vz, the frequency determined by W1 and C1) is put onto the noninverting-terminal of the comparison amplifier IC1 and the sampling voltage is put onto the inverting-terminal of the comparison amplifier.



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