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Classic Charger Schematic

Posted by Tony Duell (UK) on 18 Sept 2003, 9:23 p.m.

                 HP82011 (etc) 'classic series' charger
                 --------------------------------------

(Unregulated PSU)

-----)|| )||(----+----->|--+-----+------ +16V )||( | | | )||( | +-->|--+ === 400uF Mains)||( | | --- )||( +--)--|<--+ | )||( | | | )||(-------+--|<--+-----+---+ -----)|| | --- ///

(Constant voltage regulator)

c e +16V ----+------\ >---------------------- +4.2V Logic Supply | \ / (NPN power transistor) | ------- / | b \ | / 470R | \ | | | +---------+ | ---, ^ 4.7V zener | --- ///

(Constant current charger)

(PNP power transistor) 13R e c +16V -----+----\/\/\---+--------> /------------- 55mA constant current | | b \ / charger supply | ----- ----- | e / \ c | b +----------> \--------+ (PNP signal transistor) | / \ 4k7 / \ | --- ///

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