BQ24152 Datasheet, PDF (8/38 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24152
SLUS847 – JUNE 2008 ...................................................................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS
Using circuit shown in Figure 1, T_A = 25°C, unless otherwise specified.
ADAPTER INSERTION
BATTERY INSERTION/REMOVAL
VBAT
2 V/div
VBUS
2 V/div
VSW
5 V/div
VSW
5 V/div
Vbus =5 V, Iin_limit = 500 mA,
32S Mode
I_BAT
0.5 A/div
Vbus = 0–5 V, Vbat = 3.5 V Charge mode
I_BAT
0.5 A/div
500 mS/div
Figure 3.
PWM CHARGING WAVEFORMS
VSW
2 V/div
IL
0.5 A/div
Vbus = 5 V, Vbat = 2.6 V, Voreg = 4.2 V, Ichg = 1250 mA
VBUS
2 V/div
1S/div
Figure 4.
POOR SOURCE DETECTION
VSW
5 V/div
I_BUS
0.1 A/div
Vbus = 5 V @ 10 mA, Iin_limit = 100 mA,
Vbat = 3.2 V, Ichg = 550 mA
100 nS/div
Figure 5.
V_BUS
5 V/div
BATTERY DETECTION AT POWER UP
V_BAT
1 V/div
OTG
5 V/div
I_BAT
50 mA/div
V_IN = 0-5 V,
No Battery,
C_OUT = 100 mF,
R_LOAD = 5 kW
20 mS/div
Figure 7.
2 mS/div
Figure 6.
CYCLE BY CYCLE CURRENT LIMIT IN CHARGE MODE
VSW
2 V/div
I_L
0.5 A/div
Vbus = 5 V, Vbat = 3.6 V Charge mode
operation
2 mS/div
Figure 8.
8
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