LP3921 Datasheet, PDF (18/41 Pages) National Semiconductor (TI) – Battery Charger Management and Regulator Unit with Integrated Boomer® Audio Amplifier

LP3921
SNVS580A – AUGUST 2008 – REVISED MAY 2013
www.ti.com
The following table summarizes the supported output voltages for the LP3921. Default voltages after startup are
highlighted in bold.
Data Code
LDOx PGM
O/P
8h'00
8h'01
8h'02
8h'03
8h'04
8h'05
8h'06
8h'07
8h'08
8h'09
8h'0A
8h'0B
8h'0C
8h'0D
8h'0E
8h'0F
LDO1
(V)
1.5
1.8
1.85
2.5
2.6
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
3.1
3.2
3.3
Table 4. LDO Output Voltage Programming
LDO2
(V)
2.5
2.6
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
3.1
3.2
3.3
VLDO3
(V)
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
LDO4
(V)
1.5
1.8
1.85
2.5
2.6
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
3.1
3.2
3.3
LDO5
(V)
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
LDO6
(V)
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
LDO7
(V)
1.5
1.8
1.85
2.5
2.6
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
3.1
3.2
3.3
The following table summarizes the supported charging current values for the LP3921. Default charge current
after startup is 100 mA.
Prog_Ichg[4]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
Table 5. Charging Current Programming
Prog_Ichg[3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
Prog_Ichg[2]
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
Prog_Ichg[1]
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
Prog_Ichg[0]
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
I_Charge I mA
50
100 (Default)
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
18
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