White-LED driver operates down to 1.2V supply voltage

by Dave Wuchinich, Modal Mechanics, Yonkers, NY; Edited By Charles H Small and Fran Granville, EDN, Sep 03 2007

Focus:
Two-transistor flip-flop circuit toggles at 60 kHz to drive white LED while operating from battery voltage as low as 1 V.

What you’ll learn:

• How to drive a single white LED from inputs as low as 1 V

Notes:
An EDN Design Idea

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