BQ24350 Datasheet, PDF (5/17 Pages) Texas Instruments – Over-Voltage and Over-Current Charger Front-end Protection IC With Integrated Charging FET

bq24350
bq24352
www.ti.com ............................................................................................................................................................... SLUS943A – MAY 2009 – REVISED JUNE 2009
ELECTRICAL CHARACTERISTICS (continued)
Refer to the typical application circuit shown in Figure 1 . These specifications apply over ACIN=5V, T_J = -40~125°C, unless
otherwise specified. Typical values are at T_J = 25°C.
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
T_J(OFF)
Thermal shutdown threshold
T_J(OFF-HYS) Thermal shutdown hysteresis
Junction temperature rising
Junction temperature falling
140 150 160 °C
20
°C
TYPICAL APPLICATION CIRCUIT
ACIN=5V, ICHARGE=1A, VBAT=4.2V
AC
CACIN
1 mF
ACIN
bq24350/2
Q1
Q2
GND
CHGIN
GATDRV
OUT
VBAT
BB
C_CHGIN
1 mF
CHGIN
GATDRV
ISENS
0.2 W
R_BAT
200 kW
VBAT
PACK+
PACK-
Figure 1. Host Controlled One-Cell Charger Application Circuit
TYPICAL PERFORMANCE CHARACTERISTICS
Using circuit shown in typical application circuit Figure 1, T_A = 25°C, unless otherwise specified.
ACIN RAMP UP
ACIN RAMP DOWN
ACIN 2 V/div
GATDRV 2 V/div
CHGIN Pull Down
CHGIN 2 V/div
Soft-Start
VACIN = 5.2 V, CHGIN = 4.5 V, ICHG = 0.6 A,
VGATDRV = 3.5 V, VBAT = 3.4 V
I_ACIN 0.5 A/div
Time: 2 mS/div
Figure 2.
Soft-Stop
ACIN 2 V/div
I_ACIN 0.5 A/div
CHGIN 2 V/div
VACIN = 5.2 V, CHGIN = 4.5 V, ICHG = 0.6 A,
VGATDRV = 3.5 V, VBAT = 3.4 V
Time: 1 mS/div
Figure 3.
Copyright © 2009, Texas Instruments Incorporated
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