BQ24745_14 Datasheet, PDF (13/39 Pages) Texas Instruments – SMBus-Controlled Multi-Chemistry Battery

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bq24745
SLUS761D – DECEMBER 2007 – REVISED OCTOBER 2011
TYPICAL CHARACTERISTICS (continued)
INPUT CURRENT REGULATION (DPM) TRANSIENT
SYSTEM LOAD RESPONSE
CCM TO DCM
CHARGE CURRENT REGULATION ACCURACY
VFB (BATTERY) VOLTAGE
0.5
I_(DCIN)
0
I_LOAD
-0.5
-1
I_(SYS)
VICM
t − Time = 1 ms/div
Figure 14.
-1.5
-2
3-Cell at 12.592 V,
ICHG at 4.096A
-2.5
with DCIN = 20 V
-3
4
5
6
7
8
9 10 11 12 13
Battery Voltage - V
Figure 15.
EFFICIENCY
BATTERY CHARGE CURRENT
98
4-Cell
96
94
3-Cell
92
2-Cell
90
88
1-Cell
86
1 - 4 Cell
84
ICHG at 8.064A
with DCIN = 20 V
82
80
0
1
2
3
4
5
6
7
8
9
Battery Charge Current - A
Figure 16.
BATTERY REMOVAL (From Constant-Current Mode)
VFB
PH
I(IND)
t − Time = 4 ms/div
Figure 17.
CHARGER WHEN ADAPTER INSERTED
ADAPTER REMOVED WHILE CHARGING
DCIN
ACIN
VREF
ACOK
t − Time = 4 ms/div
Figure 18.
DCIN
PH
VREF
ACOK
t − Time = 4 ms/div
Figure 19.
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