BQ24721 Datasheet, PDF (14/48 Pages) Texas Instruments – ADVANCED MULTI-CHEMISTRY AND MULTI-CELL SYNCHRONOUS SWITCH-MODE CHARGER AND SYSTEM POWER SELECTOR

bq24721
SLUS683 – NOVEMBER 2005
TYPICAL CHARACTERISTICS (continued)
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EFFICIENCY
vs
BATTERY CHARGE CURRENT
100
V_(BAT) = 16.8 V
95
BATTERY REMOVAL (CONSTANT CURRENT MODE)
90
V_(BAT) = 12.6 V
85
80
V_I = 19.5 V
T_A = 20^oC
75
0 123 45 6 7 8
Battery Charge Current − A
Figure 34.
4500
4000
REGULATION CURRENT
vs
SYSTEM CURRENT
IDPM
3500
3000
2500
2000
1500
ICHG
V_(BAT) = 12 V
V_CC = 20 V
R_(sns) = 10 mW
DPM Active
1000
500
ILOOP Active
0
0 500 1 k 1.5 k 2 k 2.5 k 3 k 3.5 k 4 k 4.5 k
System Current − mA
Figure 36.
Figure 35.
TRANSIENT SYSTEM LOAD
Figure 37.
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