BQ24313 Datasheet, PDF (6/22 Pages) Texas Instruments – OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND Li+ CHARGER FRONT-END PROTECTION IC

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SLUS817A – MARCH 2008 – REVISED NOVEMBER 2008............................................................................................................................................... www.ti.com
TERMINAL FUNCTIONS
TERMINAL
NAME
DSG
IN
1
VSS
2
NC
3
FAULT
4
CE
5
VBAT
6
ILIM
7
OUT
8
Thermal PAD
I/O
DESCRIPTION
I
Input power. Connect IN to the external DC supply. Bypass IN to VSS with a 1µF ceramic capacitor
(minimum).
– Ground terminal
This pin may have internal circuits used for test purposes. Do not make any external connection to this
pin for normal operation.
Open-drain, device status output. FAULT = Low indicates that the input FET Q1 is off due to input
O overvoltage, input overcurrent, battery overvoltage, or thermal shutdown. FAULT is high impedance
during normal operation. Connect a pullup resistor from FAULT to the desired logic level voltage rail.
I Chip enable active low input. Connect CE = High to disable the IC and turn the input FET off. Connect
CE = low for normal operation. CE is internally pulled down.
I Battery voltage sense input. Connect to the battery pack positive terminal through a resistor.
I/O
Input overcurrent threshold programming. Connect a resistor from ILIM to VSS to set the overcurrent
threshold.
O Output terminal to the charging system. Connect OUT to the external load circuitry. Bypass OUT to VSS
with a 1µF ceramic capacitor (minimum).
There is an internal electrical connection between the exposed thermal pad and the VSS pin of the
–
device. The thermal pad must be connected to the same potential as the VSS 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
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8 OUT
7 ILIM
6 VBAT
5 CE
6
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