BATTERY_LIFE_EXTENDER

Published:2009/6/30 2:05:00 Author:May | From:SeekIC

Conserves battery life by charging capacitor from 0 V at efficiencies over 80% and by allowing battery to be used to lower endpoint voltage, Will generate voltages above or below battery voltages. When used in capacitor-discharge ignition system, power conversion efficiency is so high that heatsink is unnecessary and only one power transistor is needed. Givesfull output voltage even when car battery voltage is less than half nominal value, as during cold starting. Article describes operation of circuit in detail. Tr1 may require series RC protection between collector and emitter.—R. M. Carter, Variable Voltage-Ratio Transistor Converter, Wireless World, Nov. 1975, p 519.



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