FOLDBACK CURRENT LIMITER


Posted on Feb 4, 2014

This regulator uses the drop across R3 to sense current draw, turning on Q2, removing drive from Q1, and lowering the output voltage. Limiting occurs when Q2 has 0. 65 V across the base-emitter junction. This circuit has foldback characteristics as seen from the figure.


FOLDBACK CURRENT LIMITER
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