INRUSH_CURRENT_LIMITER

Published:2009/6/15 22:02:00 Author:May | From:SeekIC

Q1 is an npn Darlington and Q2 is a pnp Darlington. MOV1 is a metal-oxide varistor and R8 is an NTC thermistor for limiting inrush current.This circuit limits ac line current to a load. When a predetermined interval has passed, RY1 shorts out thermistor or resistance RB. R4 can be 150 kΩ if R9 is not used. If power is removed, the circuit is ready for immediate restart.



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