THREE_CELL_LITHIUM_CHARGER

Published:2009/6/19 2:52:00 Author:May | From:SeekIC

This 3-A, three-cell charging circuit for lithium batteries includes a built-in on/off switch made up of Q3, R4, and D3. When a dc input is present, D3 turns on Q3, which allows current to flow through the LM3411 and Q1. If dc voltage is removed, Q3 turns off, cutting battery drain to zero.



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