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SLUS549D – DECEMBER 2002 – REVISED MARCH 2006
TYPICAL CHARACTERISTICS
AC DROPOUT VOLTAGE
vs
450
400
350
Dropout Voltage − mV
300
250
200
150
I
O(OUT)
= 250 mA
100
50
0
0
50
100
T
J
− Junction Temperature − _C
150
I
O(OUT)
= 500 mA
I
O(OUT)
= 750 mA
JUNCTION TEMPERATURE
I
O(OUT)
= 1000 mA
Figure 1.
The bqTINY-II supports a precision Li-Ion, Li-pol charging system suitable for single-cell packs.
shows
a typical charge profile, application circuit and
shows an operational flow chart.
Regulation
Voltage
Regulation
Current
Pre-Conditioning
Phase
Current Regulation
Phase
Voltage Regulation
and Charge Termination Phase
Minimum
Charge
Voltage
Charge
Voltage
Charge
Complete
Pre-Conditioning
and Taper Detect
Charge
Current
t
(PRECHG)
t
(CHG)
Figure 2. Typical Charging Profile
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