Voltage

Reference

Internal

OSC

Clock

Phase

Generator

ADC

OSC

SNS

TS

MOD

RC

BAT

LED

Timer

D D

T/ t

ALU

Voltage

Comparators3x

Voltage

Comparators

Charge

Control

bq24401

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SLUS497A – SEPTEMBER 2001 – REVISED MARCH 2010

FUNCTIONAL DESCRIPTION

The bq24401 is a versatile, NiCd and NiMH battery charge control device. See Figure 1 for a functional block

diagram and Figure 2 for a state diagram.

Figure 1. Functional Block Diagram

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