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SC820 Datasheet(PDF) 4 Page - Semtech Corporation

Part # SC820
Description  Adapter/USB Dual Input Single-cell Li-ion Charger
PDF  22 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC820 Datasheet(HTML) 4 Page - Semtech Corporation

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SC820
4
Parameter
Symbol
Conditions
Min
Typ
Max
Units
VUSB Charging Enabled Quiescent
Current
Iq
VUSB_EN
V
VAD
= 0V, V
ENB
= 0V,
excluding I
BAT
, I
IPRGM
, and I
IPUSB
23
mA
VUSB Deselected Quiescent Current(2)
Iq
VUSB_DES
V
VAD
≥ V
VUSB
25
50
μA
CV Regulation Voltage
V
CV
I
BAT
= 50mA, -40°C ≤ T
J
≤ 125°C
4.16
4.20
4.24
V
CV Voltage Load Regulation(3)
V
CV_LOAD
Relative to V
CV
@ 50mA,
V
VAD
= 5V, or V
VUSB
= 5V and V
VAD
= 0V,
1mA ≤ I
BAT
≤ 700mA, -40°C ≤ T
J
≤ 125°C
-20
10
mV
Re-charge Threshold
VT
ReQ
V
CV
— V
BAT
60
100
140
mV
Pre-charge Threshold (rising)
VT
PreQ
2.85
2.90
2.95
V
Battery Leakage Current
l
BAT_V0
V
BAT
= V
CV
, V
VAD
= V
VUSB
= 0V
0.1
1
μA
l
BAT_DIS
V
BAT
= V
CV
, V
VAD
= V
VUSB
= 5V, V
ENB
= 2V
0.1
1
μA
l
BAT_MON
V
BAT
= V
CV
, V
VAD
= V
VUSB
= 5V,
ENB not connected
0.1
1
μA
IPRGM Programming Resistor
R
IPRGM
2.05
29.4
kΩ
Fast-Charge Current, VAD input
I
FQ_AD
R
IPRGM
= 2.94kΩ, VT
PreQ
< V
BAT
< V
CV
643
694
745
mA
Pre-Charge Current, VAD input
I
PreQ_AD
R
IPRGM
= 2.94kΩ, 1.8V < V
BAT
< VT
PreQ
105
139
173
mA
Termination Current, either input
I
TERM
R
IPRGM
= 2.94kΩ, V
BAT
= V
CV
59
69
80
mA
VAD to BAT Dropout Voltage
V
DO_AD
I
BAT
= 700mA, 0°C ≤ T
J
≤ 125°C
0.75
1.0
V
IPUSB Programming Resistor
R
IPUSB
4.42
29.4
kΩ
Fast-Charge Current, VUSB input
I
FQ_USB
R
IPUSB
= 4.42kΩ, VT
PreQ
< V
BAT
< V
CV
427
462
497
mA
Pre-Charge Current, VUSB input
I
PreQ_USB
R
IPUSB
= 4.42kΩ, 1.8V < V
BAT
< VT
PreQ
69
92
116
mA
VUSB to BAT Dropout Voltage
V
DO_USB
I
BAT
= 500mA, 0°C ≤ T
J
≤ 125°C
0.55
1
V
IPRGM Fast-charge Regulated Voltage
V
IPRGM_FQ
V
VAD
= 5.0V, V
VUSB
= 0V,
VT
PreQ
< V
BAT
< V
CV
2.04
V
IPRGM Pre-charge Regulated Voltage
V
IPRGM_PQ
V
BAT
< VT
PreQ
0.408
V
IPRGM Termination Threshold Voltage
VT
IPRGM_TERM
V
BAT
= V
CV
(either input selected)
0.204
V
IPUSB Fast-charge Regulated Voltage
V
IPUSB_FQ
V
VAD
= 0V, VT
PreQ
< V
BAT
< V
CV
2.04
V
IPUSB Pre-charge Regulated Voltage
V
IPUSB_PQ
V
VAD
= 0V, V
BAT
< VT
PreQ
0.408
V
VUSB Under-Voltage Load Regulation
Limiting Voltage
V
UVLR
5mA ≤ VUSB supply current limit ≤
500mA, V
VAD
= 0V,
R
IPUSB
= 3.65kΩ (559mA)
4.40
4.57
4.70
V
Electrical Characteristics (continued)



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