Datasheet

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bq24020 , , bq24022 , , bq24023

bq24024 , bq24025 , bq24026

bq24027

SLUS549E – DECEMBER 2002 – REVISED NOVEMBER 2007

Terminal Functions

TERMINAL

NAME I/O DESCRIPTION

bq24020 bq24022

bq24023 bq24024 bq24026

bq24025 bq24027

AC 1 1 1 1 1 I AC charge input voltage

CE 8 9 8 - - I Charge enable input (active low)

Charge current set point for AC input and precharge and taper

ISET1 6 6 6 6 6 I

set point for both AC and USB

Charge current set point for USB port (high=500 mA, low=100

ISET2 7 7 7 7 7 I

mA, hi-z = disable USB charge)

OUT 10 10 10 10 10 O Charge current output

PG - 8 - - - O powergood status output (active low)

STAT1 3 3 3 3 3 O Charge status output 1 (open-drain)

STAT2 4 4 4 4 4 O Charge status output 2 (open-drain)

TE - - - - 8 I Timer enable input (active low)

TS 9 - - 9 9 I Temperature sense input

TTE - - 9 8 - I Timer and termination enable input (active low)

USB 2 2 2 2 2 I USB charge input voltage

VSS 5 5 5 5 5 - Ground input

There is an internal electrical connection between the exposed

thermal pad and VSS pin of the device. The exposed thermal

Exposed

pad must be connected to the same potential as the VSS pin

Thermal pad pad pad pad pad -

on the printed circuit board. Do not use the thermal pad as

Pad

the primary ground input for the device. VSS pin must be

connected to ground at all times

Product Folder Link(s): bq24020 bq24022 bq24023 bq24024 bq24025 bq24026 bq24027