LP3918 Datasheet, PDF (20/30 Pages) National Semiconductor (TI) – Battery Charge Management and Regulator Unit

CHARGER FULL RATE CURRENT
Programming Information
TABLE 12. Register Address 8h'11: CHGCNTL2
Data BITs
HEX
NAME
FUNCTION
000[00000]
00
Prog_ICHG 50mA
000[00001]
01
100mA
000[00010]
02
150mA
000[00011]
03
200mA
000[00100]
04
250mA
000[00101]
05
300mA
000[00110]
06
350mA
000[00111]
07
400mA
000[01000]
08
450mA
000[01001]
09
500mA
000[01010]
0A
550mA
000[01011]
0B
600mA
000[01100]
0C
650mA
000[01101]
0D
700mA
000[01110]
0E
750mA
000[01111]
0F
800mA
000[10000]
10
850mA
000[10001]
11
900mA
000[10010]
12
950mA
TERMINATION AND RESTART
The termination and restart voltage levels are determined by
the data in the VTERM[1:0] and PROG_VSTRT[1:0] bits in
the control register. The restart voltage is programmed rela-
tive to the selected termination voltage.
The Termination voltages available are 4.1V, 4.2V (default),
4.3V, and 4.4V.
The Restart voltages are determined relative to the termina-
tion voltage level and may be set to 50mV, 100mV, 150mV
(default), and 200mV below the set termination voltage level.
Programming Information
TABLE 13. Register Address 8h'12: CHGCNTL3
BIT
NAME
FUNCTION
4
VTERM[0] Set the charging termination
5
VTERM[1] ^voltage.
See Table 6
TABLE 14. Register Address 8h'12: CHGCNTL3
BIT
NAME
FUNCTION
0 VRSTRT[0] Set the charging restart voltage.
1
VRSTRT[1] ^{See Table 8}
Charger Operation
The operation of the charger with EOC enabled is shown in this simplified flow diagram.
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