BQ24350 Datasheet, PDF (2/17 Pages) Texas Instruments – Over-Voltage and Over-Current Charger Front-end Protection IC With Integrated Charging FET

bq24350
bq24352
SLUS943A – MAY 2009 – REVISED JUNE 2009 ............................................................................................................................................................... www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
SIMPLIFIED FUNCTION BLOCK DIAGRAM
ACIN
GND
VBAT
V_ACIN
V_ACIN
+
VUVLO
-
VACIN
+
VOVP
-
VACIN
+
V OUT
-
V BAT
+
BVOVP
-
VBAT
INPUT UVLO
t _{BLK ( CHGIN )}
INPUT OVP
t DGL(OVP )
SLEEP
Battery OVP
t DGL (BOVP )
Q1
Protection &
Gate Control
Control
L ogic
Thermal
Shutdown
Q2
I_IN
+
-
IO(OCP)
VCHGIN
+
- _VOREG
CHGIN Discharge
Protection
Control
V _OUT
500 W
OUT
CHGIN
GATDRV
NAME
ACIN
PIN
NUMBER
1,2
OUT
7,8
VBAT
4
GATDRV
5
CHGIN
6
GND
3
Thermal PAD
PIN FUNCTIONS
I/O DESCRIPTION
I Power Supply Input, connect to an external DC supply. Connect an external 1µF ceramic capacitor
(minimum) to GND.
O Output terminal to the charging system.
I Battery voltage sense input. Connected to pack positive terminal through a resistor. Connected to
ground if battery OVP function is not used.
I P-FET gate drive input , connected to gate drive pin of the host charger controller
O Output power pin for power input of host charger controller. Connect an external ceramic bypass
capacitor (1.0µF minimum) to GND.
– Ground terminal
There is an internal electrical connection between the exposed thermal pad and the GND pin of the
device. The thermal pad must be connected to the same potential as the GND pin on the printed circuit
board. Do not use the thermal pad as the primary ground input for the device. GND pin must be
connected to ground at all times.
PART NUMBER
bq24350DSGR
bq24350DSGT
bq24352DSGR
bq24352DSGT
MARKING
OAJ
OAJ
OCY
OCY
ORDERING INFORMATION
MEDIUM
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
QUANTITY
3000
250
3000
250
PACKAGE
2mm × 2mm SON
2mm × 2mm SON
2mm × 2mm SON
2mm × 2mm SON
INPUT OVP
THRESHOLD
6.17 V
6.17 V
7.1 V
7.1 V
2
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