BQ24742 Datasheet, PDF (12/35 Pages) Texas Instruments – Li-Ion or Li-Polymer Battery Charger with Low Iq and Accurate Trickle Charge

bq24741, bq24742
SLUS875B – MARCH 2009 – REVISED OCTOBER 2009
INPUT CURRENT
vs
ACSET/VDAC RATIO
10
9
3-Cell
8
7
6
5
4
3
2
1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
VACSET/VDAC
Figure 9.
BAT VOLTAGE REGULATION ACCURACY
vs
CHARGE CURRENT
0.030
0.025
0.020
0.015
0.010
0.005
0.000
0
0.5
1
1.5
2
2.5
3
3.5
4
Charge Current (A)
Figure 11.
0.165
0.16
TRICKLE CHARGE CURRENT
vs
BAT VOLTAGE
VBAT 0 V to 12.6 V
0.155
0.15
VBAT 12.6 V to 0 V
0.145
0
2
4
6
8
10
BAT Voltage (V)
Figure 13.
12
14
www.ti.com
DPM ACCURACY
vs
V(ACP-ACN) SETPOINT
2
0
-2
-4
-6
-8
-10
0
10 20 30 40 50 60 70 80 90 100
IIN_reg Setpoint (mV)
Figure 10.
0.00%
-0.50%
-1.00%
-1.50%
-2.00%
-2.50%
-3.00%
-3.50%
-4.00%
-4.50%
-5.00%
0 10
V_IADAPT ACCURACY
vs
V(ACP-ACN) VOLTAGE
20 30 40 50 60 70
V(ACP-ACN) (mV)
Figure 12.
80 90 100
DPM and CHARGE CURRENT
vs
SYSTEM CURRENT
4.5
4
3.5
Input Current
3
2.5
2
Charge Current
1.5
1
0.5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
System Current (A)
Figure 14.
12
Submit Documentation Feedback
Product Folder Link(s) :bq24741 bq24742
Copyright © 2009, Texas Instruments Incorporated