Circuit - Battery Chargers Electronic Circuits Designed by David A. Johnson, P.E.


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Battery Chargers Circuits
Designed by David A. Johnson, P.E.
Last Updated on: Thursday, January 01, 2009 06:56 AM

Master Category List - Dave's Circuits

Candle Power: A single lit candle in conjunction with an inexpensive thermopile voltage generator provides enough power to charge a small battery when used with a small low voltage DC to DC converter.

Solar Powered Lithium Ion Battery Charger uses a LTC1734
The circuit below feeds a controlled current and voltage to a 3.6v lithium ion battery. The current is limited to 300ma and the voltage is limited to 4.2 volts. The circuit uses a LTC1734 IC from Linear Technology. No diode is needed between the circuit and a 6 volt solar panel....

Two 12v Battery Isolator with a LTC4412: Linear Technology has just announced a neat little chip (LTC4412). It has been designed to be used in conjunction with an external P-channel power FET, to form an ideal diode function with a very low 0.05v voltage drop. The chip monitors the voltage on either side of the FET. As long as the voltage on the drain side is greater than the source side, the FET is turned on....

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