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SHORT_CIRCUIT_PROTECTION

2016-09-16 04:15  
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SHORT_CIRCUIT_PROTECTION
Series regulator has automatic pulsing-type short-circuit protection. D1, R2, and R3 form constant. current prelimiting circuit, and Q4 is shut-off transistor. Unijuunction transistor Q5 pulses continuously. D2 completes discharge path of C1 through R4 when Q5 fires.-A. G. Lloyd, Overload Protection for Transistor Voltage Regulators, Electronics, 33:52, p 56-59.