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PDF WS4518E Data sheet ( Hoja de datos )
| Número de pieza | WS4518E | |
| Descripción | Single Li-ion Battery Charger | |
| Fabricantes | WillSEMI | |
| Logotipo |  |
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WS4518E
300mA, Single Li-ion Battery Charger
WS4518E
www.sh-willsemi.com
Descriptions
The WS4518E is a complete constant-current /
constant voltage linear charger for single cell
Lithium-Ion batteries. No external sense resistor is
needed, and no blocking diode is required due to the
internal MOSFET architecture. Thermal feedback
regulates the charge current to limit the die
temperature during high power operation or high
ambient temperature. The charge voltage is fixed at
4.2V, and the charge current can be programmed
externally with a single resistor.
The WS4518E automatically terminates the charge
cycle when the charge current drops to 3/10 the
programmed value after the final float voltage is
reached.
When the input supply (wall adapter or USB supply) is
removed, the WS4518E automatically enters a low
current state, dropping the battery drain current to less
than 0.5uA. The WS4518E can be put into shutdown
mode, reducing supply current to 40uA (Typ.).
The WS4518E is available in a small package with
SOT-23-5L. Standard product is Pb-Free.
Features
Programmable Charge Current Up to 300mA
Over-Temperature Protection
Under Voltage Lockout Protection
Automatic Recharge Threshold 4.05V(Typ.)
Charge Status Output Pin
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
SOT-23-5L
CHGb 1
GND 2
BAT 3
5 PROG
4 VCC
Pin configuration (Top view)
54
4518
EAYW
1 23
4518 = Device Code
EA = Package Code
Y = Year
W = Week
Marking
Order information
Applications
Wireless phone
MP3/MP4 Player
Bluetooth device
Device
Package
Shipping
WS4518E-5/TR SOT-23-5L 3000/Reel&Tape
Will Semiconductor Ltd.
1 Apr, 2016 - Rev. 1.3
1 page  
Typical Characteristics (Ta=25oC, unless otherwise noted)
WS4518E
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
VBAT=4.0V
0.94
RPROG=10KΩ
0.92
RPROG=20KΩ
RPROG=50KΩ
0.90
4.0 4.5 5.0 5.5 6.0 6.5
VCC ( V )
PROG Pin Voltage vs Supply Voltage
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
-50
-25
0
VBAT=4V
RPROG=10KΩ
RPROG=20KΩ
RPROG=50KΩ
25 50 75 100
Temperature ( OC )
PROG Pin Voltage vs Ambient Temperature
110
100
90
80
70
60
50
40
30
20 VCC = 5 V
10 RPROG = 10K
0
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
VPROG ( V )
Charge Current vs PROG Pin Voltage
110
100
90
80
70
60
50
40
30
20
10
0
4.0
VBAT=4.0V
RPROG=10KΩ
RPROG=20KΩ
RPROG=50KΩ
4.5 5.0 5.5
VCC ( V )
6.0
Charge Current vs Supply Voltage
30
28
26
24
22
20
18
16
VBAT=2.5V
RPROG=10KΩ
RPROG=20KΩ
RPROG=50KΩ
14
12
10
8
6
4
2
0
4.0 4.5 5.0 5.5 6.0 6.5
VCC ( V )
Trickle Charge Current vs Supply Voltage
3.00
2.95
2.90
2.85
2.80
2.75
2.70
RPROG=10KΩ
2.65
RPROG=20KΩ
RPROG=50KΩ
2.60
4.0 4.5 5.0 5.5 6.0 6.5
VCC ( V )
Trickle Voltage vs Supply Voltage
Will Semiconductor Ltd.
5 Apr, 2016 - Rev. 1.3
5 Page 
Package outline dimensions
SOT-23-5L
WS4518E
Symbol
A
A1
A2
b
c
D
E
E1
e
e1
L
θ
Will Semiconductor Ltd.
Dimensions In Millimeters
Min.
Max.
1.050
1.250
0.000
0.100
1.050
1.150
0.300
0.500
0.100
0.200
2.820
3.020
1.500
1.700
2.650
2.950
0.950(Basic)
1.800
2.000
0.300
0o
0.600
8o
11 Apr, 2016 - Rev. 1.3
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet WS4518E.PDF ] | |
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