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参数资料
| 型号： | LP3918TLX-I |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25 |
| 封装： | 2.50 X 2.50 MM, MICRO, SMD-25 |
| 文件页数： | 2/30页 |
| 文件大小： | 1271K |
| 代理商： | LP3918TLX-I |
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Charger Electrical Characteristics
Unless otherwise noted, V
CHG-IN = 5V, VIN ( = VIN1 = VIN2 = BATT) = 3.6V.CCHG_IN = 10F, CBATT = 30F. Charger set to default
settings unless otherwise noted. Typical values and limits appearing in normal type apply for T
J = 25°C. Limits appearing in
boldface
type apply over the entire junction temperature range for operation, T
Symbol
Parameter
Condition
Typ
Limit
Units
Min
Max
V
CHG-IN
Input Voltage Range
4.5
6.5
V
Operating Range
4.5
6
V
OK_CHG
CHG_IN OK trip-point
V
CHG_IN - VBATT (Rising)
200
mV
V
CHG_IN - VBATT (Falling)
50
V
TERM
Battery Charge
Termination voltage
Default
4.2
V
TERM voltage tolerance
T
J = 25°C
-0.35
+0.35
%
T
J = 0°C to 85°C
-1
+1
I
CHG
Fast Charge Current
Accuracy
I
CHG = 450mA
-10
+10
%
Programmable full-rate
charge current range
(default 100mA)
6.0V
≥ V
CHG_IN ≥ 4.5V
50
950
mA
V
BATT < (VCHG_IN - VOK_CHG)
V
FULL_RATE < VBATT < VTERM
(Note 10)
Default
100
Charge current
programming step
50
I
PREQUAL
Pre-qualification current
V
BATT = 2V
50
40
60
mA
I
CHG_USB
CHG_IN programmable
current in USB mode
5.5V
≥ V
CHG_IN ≥ 4.5V
Low
100
mA
V
BATT < (VCHG_IN - VOK_CHG)
V
FULL_RATE < VBATT < VTERM High
450
Default = 100mA
100
V
FULL_RATE
Full-rate qualification
threshold
V
BATT rising, transition from pre-qual
to full-rate charging
3.0
2.9
3.1
V
I
EOC
End of Charge Current, %
of full-rate current
0.1C option selected
10
%
V
RESTART
Restart threshold voltage V
BATT falling, transition from EOC to
full-rate charge mode. Default options
selected - 4.05V
4.05
3.97
4.13
V
I
MON
I
MON Voltage 1
I
CHG = 100mA
0.247
V
I
MON Voltage 2
I
CHG = 450mA
1.112
0.947
1.277
T
REG
Regulated junction
temperature
(Note 7)
115
°C
Detection and Timing
(Note 7)
T
POK
Power OK deglitch time
V
BATT < (VCC - VOK_CHG)
32
mS
T
PQ_FULL
Deglitch time
Pre-qualification to full-rate charge
transition
230
mS
T
CHG
Charge timer
Precharge mode
1
Hrs
Full Rate Charging Timeout
5
Constant Voltage Timeout
5
T
EOC
Deglitch time for end-of-
charge transition
230
mS
www.national.com
10
LP3918
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