ADJUSTABLE_OVERLOAD_TRIP

Published:2009/7/21 11:01:00 Author:Jessie | From:SeekIC

Protection circuit, added to conventional regulator, consists of R1, R2, R3, R4, C2, CR2, CR3, and Q1. When load current reaches preset trip level, drop across R1 tums on Q1, which in turn saturates Q2 ond cuts off regulator transistor Q3-Q4 to protect these transistors and reduce output voltage to zero. Turnoff is regenerative, hence fast. To reset, supply voltage is switched off and then back on.-W. A. O'Berry, Adjustable Overload Protection, EEE, 12:2, p 29.



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