Over-voltage Protection Circuit of High Voltage Power Supply

Published:2011/7/19 11:20:00 Author:Michel | Keyword: High Voltage Power Supply, Over-voltage Protection Circuit | From:SeekIC

The picture 49 is over-voltage protection circuit of high voltage power supply circuit.The over-voltage power supply is provided by output voltage and the work current is around 2mA.In the circuit ,if Ucc voltage is judged as over-voltage,the protection action begins and Uth formula is .RRP1-2 is the voltage between RP1 sliding end and R2 point,Uz is VD1 stable voltage an d UBE is VT1's base-emitter voltage.This circuit outputs photoelectric coupler TLP521-1 and it isolates.Thus,it can also be used for the ac power of over-voltage protection



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/Over_voltage_Protection__Circuit_of_High_Voltage_Power_Supply.html

Print this Page | Comments | Reading(3)