BQ25050 Datasheet, PDF (10/28 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path

bq25050
SLUSA33 – MARCH 2010
TYPICAL CHARACTERISTICS (continued)
Using circuit in Figure 1, T_A = 25°C, unless otherwise specified
CANCEL BGATE FORCED ON
INPUT OVP
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CTRL
2 V/div
VBAT
2 V/div
Offset 4.1 V
VOUT
2 V/div
Offset 4.1 V
BGATE
2 V/div
VIN = 5 V, VBAT = 4.18 V, VBAT(REG) = 4.2 V
1 ms/div
Figure 9.
VIN
10 V/div
VBAT
2V/div
LDO
2 V/div
IBAT
0.5 A/div
VIN = 5 V to 29 V, VBAT = 3.8 V
50 µs/div
Figure 10.
PRE-CHARGE MODE TO MINIMUM OUTPUT REGULATION
MODE
VIN = 5 V, VBAT = 1.8 V to 3.45 V, ICHG = 467 mA
VBAT
500 V/div
IMON
500 mV/div
BGATE
2 V/div
MINIMUM OUTPUT REGULATION MODE TO CONSTANT
CURRENT (CC) MODE
VBAT
500 V/div
VIN = 5 V, VBAT = 2.4 V to 3.6 V, ICHG = 467 mA
IMON
500 mV/div
BGATE
2 V/div
IBAT
500 mA/div
20 ms/div
Figure 11.
IBAT
500 mA/div
20 ms/div
Figure 12.
PRE-CHARGE TO CONSTANT VOLTAGE (CV) MODE
VBAT
500 mV/div
IMON
500 mV/div
BGATE
2 V/div
IBAT
500 mA/div
VIN = 5 V, VBAT = 2.8 V to 4.18 V, ICHG = 467 mA
20 ms/div
Figure 13.
VIN
2 V/div
IIN
500 mA/div
IMON
500 mV/div
BGATE
2 V/div
VIN-DPM
VIN = 5 V with current limit of 600 mA,
VBAT = 3.2 V, ICHG = 93 mA to 935 mA
200 µs/div
Figure 14.
10
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