BQ24314_1 Datasheet, PDF (5/25 Pages) Texas Instruments – OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND Li+ CHARGER FRONT-END PROTECTION IC

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bq24314
bq24316
SLUS763C – JULY 2007 – REVISED OCTOBER 2007
TERMINAL FUNCTIONS
NAME
IN
TERMINAL
DSJ
1, 2
DSG
1
OUT
VBAT
ILIM
CE
FAULT
VSS
NC
10, 11
8
8
6
9
7
7
5
4
4
3
2
5, 6, 12 3
Thermal
PAD
I/O
DESCRIPTION
I Input power, connect to external DC supply. Connect external 1μF ceramic capacitor (minimum) to
VSS. For the 12 pin (DSJ-suffix) device, ensure that pins 1 and 2 are connected together on the
PCB at the device.
O Output terminal to the charging system. Connect external 1μF ceramic capacitor (minimum) to VSS.
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 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.
IN 1
VSS 2
NC 3
FAULT 4
bq24314DSG
bq24316DSG
8 OUT
7 ILIM
6 VBAT
5 _CE
IN 1
IN ²
VSS 3
FAULT 4
NC ⁵
NC 6
bq24314DSJ
bq24316DSJ
12 NC
11 OUT
10 OUT
9 _ILIM
8 VBAT
7 CE
Copyright © 2007, Texas Instruments Incorporated
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