The VMOS pipe switch regulated power supply circuit

Published:2011/6/23 6:38:00 Author:qqtang | Keyword: VMOS, switch, power supply | From:SeekIC

In the circuit is another VMOS pipe switch regulated power supply circuit. As the circuit is fixed with the voltage comparator 710, so this circuit is simpler than the former one. In the circuit, the resistors (R1, R2 and R3) and the stabilivolts(VD1 and VD2) compose the voltage distribution circuit, the 28V voltage is split into the voltages of 5v, 6v and 18v as the power supply of 710; the resistors(R12 and R13), capacitors C13, diodes(VD6 and VD7) and transistor VT3 compose the power supply soft starting circuit. At the moment of power-on, the starting circuit can make the VT1 drive pulse width of VMOS pipe increase the in index patten.



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