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SC908 Datasheet(PDF) 4 Page - Semtech Corporation

Part # SC908
Description  Power Management IC for Single-Cell Li-Ion Devices
PDF  30 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC908 Datasheet(HTML) 4 Page - Semtech Corporation

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



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