BQ24314A Datasheet, PDF (5/21 Pages) Texas Instruments – OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND Li+ CHARGER FRONT-END PROTECTION IC

bq24314A
www.ti.com
SLUS811 – MARCH 2008
TERMINAL FUNCTIONS
TERMINAL
NAME
DSG
IN
1
OUT
8
VBAT
6
ILIM
7
CE
5
FAULT
4
VSS
2
NC
3
Thermal PAD
I/O
DESCRIPTION
I Input power, connect to external DC supply. Connect external 1µF ceramic capacitor (minimum) to V_SS.
O Output terminal to the charging system. Connect external 1µF ceramic capacitor (minimum) to V_SS.
I Battery voltage sense input. Connect to pack positive terminal through a resistor.
I/O Input overcurrent threshold programming. Connect a resistor to VSS to set the overcurrent threshold.
I Chip enable input. Active low. When CE = High, the input FET is off. Internally pulled down.
O
Open-drain output, device status. FAULT = Low indicates that the input FET Q1 has been turned off due
to input overvoltage, input overcurrent, battery overvoltage, or thermal shutdown.
– Ground terminal
These pins may have internal circuits used for test purposes. Do not make any external connections at
these pins for normal operation.
There is an internal electrical connection between the exposed thermal pad and the V_SS pin of the
–
device. The thermal pad must be connected to the same potential as the V_SS pin on the printed circuit
board. Do not use the thermal pad as the primary ground input for the device. The VSS pin must be
connected to ground at all times.
DSG Package
(Top View)
IN 1
VSS 2
NC 3
FAULT 4
bq24314A
8 OUT
7 ILIM
6 VBAT
5 CE
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