Micropower Linear Voltage Regulator in the Battery Charger Circuit

Posted on Feb 4, 2014

In the ADM666A application note, you can find detailed explanation about this low cost battery charger circuit such as Maximum output voltage, Charge termination voltage calculation, monitoring the battery voltage level, maximizing the circuit efficiency, and etc. The ADM666A uses an NPN transistor and a P-channel FET. The output from the comparat

Micropower Linear Voltage Regulator in the Battery Charger Circuit
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or drives an open drain FET connected to the low battery output pin, LBO. The low battery threshold may be set using a suitable voltage divider connected to LBI. When the voltage on LBI falls below 1. 3 V, the open drain output LBO is pulled low.

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