LP3918 Datasheet, PDF (22/39 Pages) National Semiconductor (TI) – Battery Charge Management and Regulator Unit

LP3918
SNVS476D – AUGUST 2007 – REVISED MAY 2013
Programming Information
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Table 9. Register Address 8h'10: CHGCNTL1
BIT
NAME
FUNCTION
2
En_EOC
Enables the End Of Charge current level threshold detection.
When set to '0' the EOC is disabled.
The End Of Charge current threshold default setting is at 0.1C. This EOC value is set relative to C the set full
rate constant current. This threshold can be set to 0.1C, 0.15C, 0.2C or 0.25C bychanging the contents of the
PROG_EOC[1:0] register bits.
Table 10. Register Address 8h'12: CHGCNTL3
BIT
NAME
FUNCTION
2
Prog_EOC[0]
Set the End Of Charge Current.
3
Prog_EOC[1]
See Table 8
CHARGER FULL RATE CURRENT
Programming Information
Data BITs
000[00000]
000[00001]
000[00010]
000[00011]
000[00100]
000[00101]
000[00110]
000[00111]
000[01000]
000[01001]
000[01010]
000[01011]
000[01100]
000[01101]
000[01110]
000[01111]
000[10000]
000[10001]
000[10010]
Table 11. Register Address 8h'11: CHGCNTL2
HEX
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
NAME
Prog_ICHG
FUNCTION
50mA
100mA
150mA
200mA
250mA
300mA
350mA
400mA
450mA
500mA
550mA
600mA
650mA
700mA
750mA
800mA
850mA
900mA
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 relative 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 termination voltage level and may be set to 50mV, 100mV,
150mV (default), and 200mV below the set termination voltage level.
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