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參數(shù)資料
| 型號： | LP3918TLX-L |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Battery Charge Management and Regulator Unit |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25 |
| 封裝： | 2.50 X 2.50 MM, MICRO, SMD-25 |
| 文件頁數(shù)： | 15/30頁 |
| 文件大?。?/td> | 1292K |
| 代理商： | LP3918TLX-L |
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The charger operation may be depicted by the following
graphical representation of the voltage and current profiles.
20211635
FIGURE 3. Charge Cycle Diagram
Further Charger Register Information
Charger Control Register 1
TABLE 15. Register Address 8h'10: CHGCNTL1
BIT
NAME
FUNCTION (if bit = '1')
7
USB_MODE
_EN
Sets the Current Level in USB
mode.
6
CHG_MODE
_EN
Forces the charger into USB mode
when active high.
If low, charger is in normal charge
mode.
5
FORCE
_EOC
Forces an EOC event.
4
TOUT_
Doubling
Doubles the timeout delays for all
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_
LDOmode
Forces the charger into LDO mode.
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
_OUT
Is set when battery voltage
exceeds 4.7V.
6
CHGIN_
OK_Out
Is set when a valid input voltage is
detected at CHG_IN pin.
5
EOC
Is set when the charging current
decreases below the programmed
End Of Charge levlel.
4
Tout_
Fullrate
Set after timeout on full rate
charge.
3
Tout_
Precharge
Set after timeout for 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_
ConstV
Set after timeout in CV phase.
0
BAD_
BATT
Set at bad battery state.
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LP3918
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