SC908 데이터 시트보기 (PDF) - Semtech Corporation
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SC908 Datasheet PDF : 30 Pages
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SC908
Electrical Characteristics (continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Charger (continued)
Charging Adapter
Operating Current
CV Regulation Voltage
V = 0.5 × V , I = I = I =
VAD
EN_NTC
VSYS CPB CHRGB FLTB
1.5
mA
ICCQ
I = I = I = 0mA, V = V = 0V
LBATB ITERM IPRGM
SEN
LEN
Measured at BSEN pin
V
20mA < I < 500mA
4.16
4.2
4.24
V
CV
BAT
0°C < T < 125°C
J
Precharge Threshold (Rising)
VT
PreQ
Measured at BSEN pin
2.7
2.8
2.9
V
Recharge Threshold (Falling)
VT
ReQ
V -V
CV BSEN
65
113
160
mV
VSYS output voltage (3)
V
VSYS
V ≥ 5V, I ≤ 5mA
VAD
VSYS
4.7
V
VSYS output current
I
VSYS
5
mA
ITERM Programming Resistor
R
ITERM
Nominal 1%-tol Standard Value
2.67
17.4
kΩ
I Pre-Charge Current
BAT
I
R = 4.99kΩ to GND
27
39
52
mA
PreQ
ITERM
I Termination Current
I
R = 4.99kΩ to GND
27
39
52
mA
BAT
TERM
ITERM
IPRGM Programming Resistor
R
IPRGM
Nominal 1%-tol Standard Value
2.15
15.0
kΩ
IBAT Fast-Charge Current
IFQ
RIPRGM = 6.04kΩ, VBAT = 3.7V
167
173
179
mA
VAD - BAT Dropout Voltage
V
DO
I = 500mA, 0°C ≤ T ≤ 85°C
BAT
J
0.8
V
IPRGM Regulated Voltage
V
IPRGM
R = 6.04kΩ to GND
IPRGM
1.45
1.5
1.55
V
ITERM Regulated Voltage
VITERM
RITERM = 4.99kΩ to GND
1.45
1.5
1.55
V
RTIME Regulated Voltage
V
RTIME
R = 37.4kΩ to GND
RTIME
1.475
1.56
1.625
V
Precharge Fault Time-Out
t
PreQF
R = 37.4kΩ to GND
RTIME
RRTIME connected to VSYS
38
47
57
mins
32
42
53
mins
Charge Complete Time-Out
t
QComp
R = 37.4kΩ to GND
RTIME
R connected to VSYS
RTIME
2.50
3.10
3.70
hrs
2.10
2.67
3.50
hrs
VTNTC_DIS
Charger Disable/Reset (Falling)
9
10
11.5
%VVSYS
EN_NTC Thresholds
VT
NTC_HF
NTC Hot (Falling)
27.5
30
31.5
%V
VSYS
VT
NTC_CR
NTC Cold (Rising)
74
75
76.5
%V
VSYS
EN_NTC Hysteresis
VTNTC_HYS
VVAD = 5V
45
mV
EN_NTC Disable/Reset Hold
t
Momentary disable resets charger
500
ns
Time
NTC_DIS_H
Charger Over-Temperature Shut-
down Temperature (Rising)
T
CHRGR_OT
Hysteresis = 10°C typical
145
°C
4
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