LP3918 Datasheet, PDF (22/30 Pages) National Semiconductor (TI) – Battery Charge Management and Regulator Unit

Further Charger Register Information
Charger Control Register 1
TABLE 15. Register Address 8h'10: CHGCNTL1
BIT
NAME
FUNCTION (if bit = '1')
7 USB_MODE Sets the Current Level in USB
_EN
mode.
6 CHG_MODE Forces the charger into USB mode
_EN
when active high.
If low, charger is in normal charge
mode.
5
FORCE Forces an EOC event.
_EOC
4
TOUT_ Doubles the timeout delays for all
Doubling timeout signals.
3
EN_Tout Enables the timeout counters.
When set to '0' the timeout
counters are disabled.
2
EN_EOC Enables the End of Charge current
level threshold detection. When set
to '0' the functions are disabled.
1
Set_
Forces the charger into LDO mode.
LDOmode Function available on
LP3918TL_L.
0
EN_CHG Charger enable.
Charger Status Register 1 Read only
TABLE 16. Register Address 8h'13: CHGSTATUS1
BIT
NAME
FUNCTION (if bit = '1')
7 BAT_OVER Is set when battery voltage
_OUT
exceeds 4.7V.
6
CHGIN_ Is set when a valid input voltage is
OK_Out detected at CHG_IN pin.
5
EOC
Is set when the charging current
decreases below the programmed
End Of Charge levlel.
4
Tout_
Set after timeout on full rate
Fullrate charge.
3
Tout_
Set after timeout for precharge
Precharge mode.
2 LDO_Mode Only available on LP3918TL_L.
1
Fullrate Set when the charger is in CC/CV
mode.
0
PRECHG Set during precharge.
Charger Status Register 2 Read only
TABLE 17. Register Address 8h'13: CHGSTATUS2
BIT
NAME
FUNCTION (if bit = '1')
1
Tout_
Set after timeout in CV phase.
ConstV
0
BAD_
Set at bad battery state.
BATT
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