BQ24705 Datasheet, PDF (11/30 Pages) Texas Instruments – Host-Controlled Multi-Chemistry Battery Charger With Low Input Power Detect

www.ti.com
INPUT CURRENT REGULATION (DPM) ACCURACY
10
9
ACSET Varied
8
7
6
4-Cell, VBAT = 16 V
5
4
3
2
1
0
-1
-2
0
1
2
3
4
5
6
Input Current Regulation Setpoint - A
Figure 12.
INPUT REGULATION CURRENT (DPM), AND CHARGE
CURRENT
vs
SYSTEM CURRENT
5
V_I = 20 V,
4-Cell,
4 ^Vbat ^{= 16 V}
Input Current
3
2
Charge Current
1
0
0
1
2
3
4
System Current - A
Figure 14.
CHARGE CURRENT REGULATION
vs
BAT VOLTAGE
5
4
3
2
1
Ichrg_set = 4 A
0
0
2
4
6
8
10 12 14 16
18
Battery Voltage - V
Figure 16.
bq24705
SLUS779 – DECEMBER 2007
V_IADAPT INPUT CURRENT SENSE AMPLIFIER ACCURACY
5
0
-5
-10
V_I = 20 V, CHG = DIS
V_I = 20 V, CHG = EN
-15
-20
-25
0
12
Iadapt Amplifier Gain
3
4
5
6
7
8
9 10
I_(ACPWR) - A
Figure 13.
TRANSIENT SYSTEM LOAD (DPM) RESPONSE
Figure 15.
EFFICIENCY
vs
BATTERY CHARGE CURRENT
100
90
VI = 21 V
V(BAT) = 16.8 V
VI = 20 V
V(BAT) = 12.6 V
VI = 20 V
V(BAT) = 8.4 V
80
TA =20^oC
70
0
2000
4000
6000
Battery Charge Current - mA
Figure 17.
8000
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s) :bq24705
Submit Documentation Feedback
11