BQ24765_15 Datasheet, PDF (11/37 Pages) Texas Instruments – SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs

www.ti.com
bq24765
SLUS999 – NOVEMBER 2009
TYPICAL CHARACTERISTICS (continued)
VFB VOLTAGE REGULATION ACCURACY
vs
CHARGE CURRENT
0.02
VFB VOLTAGE REGULATION ACCURACY
vs
SET POINT
0.3
0.00
-0.02
-0.04
-0.06
-0.08
Vreg = 12.592V
0.2
0.1
0.0
-0.1
-0.10
-0.2
-0.12
-0.3
-0.14
-0.16
-0.4
-0.18
-0.5
-0.20
0
1k 2k 3k 4k 5k 6k 7k 8k 9k
Current Setpoint - mA
Figure 5.
-0.6
0
5000 10000 15000
VREG DAC Set Point - mV
Figure 6.
CHARGE CURRENT REGULATION ACCURACY
vs
V(CSOP-CSON) VOLTAGE SET POINT
12.0
10.0
8.0
6.0
4.0
2.0
0.0
0
1k 2k 3k 4k 5k 6k 7k 8k
ICHG DAC Set Point - mA
Figure 7.
CHARGE CURRENT REGULATION
vs
VFB VOLTAGE
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
0
Vbat_dac = 12.592V, Ichrg_dac = 4.096A
Actual regulation: Ichrg = 220mA at VFB<2.5V
Ichrg = 3A max at 2.5V<VFB<4V
Ichrg = 4.096A at VFB>4V
2 4 6 8 10 12 14
Battery Voltage - V
Figure 8.
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s) :bq24765
Submit Documentation Feedback
11