BQ25050 Datasheet, PDF (9/28 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path

bq25050
www.ti.com
SLUSA33 – MARCH 2010
TYPICAL CHARACTERISTICS
Using circuit in Figure 1, T_A = 25°C, unless otherwise specified
ADAPTER INSERTION
ENABLE USING CTRL
VIN = 0 V - 5 V, VBAT = 3.3 V, I_CHG = 280 mA
CTRL
2 V/div
VIN = 5 V, VBAT = 3 V, I_CHG = 280 mA
VIN
5 V/div
BGATE
2 V/div
LDO
2 V/div
I_CHG
0.5 A/div
10 ms/div
Figure 3.
CHG
2 V/div
BGATE
2 V/div
IIN
100 mA/div
20 ms/div
Figure 4.
CTRL
2 V/div
LDO
2 V/div
BGATE
2 V/div
IIN
2 mA/div
DISABLE USING CTRL
VIN = 5 V, VBAT = 3.4 V, I_CHG = 280 mA
CONTROL CURRENT LIMIT - STEP UP
CTRL
2 V/div
BGATE
2 V/div
IMON
500 mV/div
VIN = 5 V, VBAT = 3.4 V, I_CHG = 93 mA to 935 mA
I_BAT
0.5 A/div
1 ms/div
Figure 5.
5 ms/div
Figure 6.
CONTROL CURRENT LIMIT - STEP DOWN
CTRL
2 V/div
BGATE
2 V/div
IMON
500 MV/div
VIN = 5 V, VBAT = 3.4 V, I_CHG = 935 mA to 93 mA
IBAT
500 mA/div
5 ms/div
Figure 7.
CTRL
2 V/div
VBAT
2 V/div
Offset 4.1 V
VOUT
2 V/div
Offset 4.1 V
BGATE
2 V/div
BGATE FORCED ON
VIN = 5 V, VBAT = 4.18 V, VBAT(REG) = 4.2 V
1 ms/div
Figure 8.
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