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WS4518D 데이터시트 PDF




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부품번호 WS4518D 기능
기능 Single Li-ion Battery Charger
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WS4518D 데이터시트, 핀배열, 회로
WS4518D
300mA, Single Li-ion Battery Charger
WS4518D
www.sh-willsemi.com
Descriptions
The WS4518D 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 WS4518D automatically terminates the charge
cycle when the charge current drops to 3/10 the
programmed value after the final float voltage is
reached.
DFN2X2-6L
PROG 1
GND
6 TEMP
GND 2
WS4518D
5 CHRGb
VCC 3
Expose Pad
4 BAT
Pin configuration (Top view)
When the input supply (wall adapter or USB supply) is
removed, the WS4518D automatically enters a low
current state, dropping the battery drain current to less
than 0.5uA. The WS4518D can be put into shutdown
mode, reducing supply current to 40uA (Typ.).
4518
WDYW
The WS4518D is available in a small package with
DFN2X2-6L. 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
4518 = Device Code
WD = Package Code
Y = Year
W = Week
Marking
Order information
Device
Package
Shipping
WS4518D-6/TR DFN2X2-6L 3000/Reel&Tape
Applications
Wireless phone
MP3/MP4 Player
Bluetooth device
Will Semiconductor Ltd.
1 Apr, 2016 - Rev. 1.3




WS4518D pdf, 반도체, 판매, 대치품
Absolute Maximum ratings
Parameter
Supply Voltage
PROG Voltage
BAT Voltage
CHRGb Voltage
BAT Pin Current
Power Dissipation Note1
Power Dissipation Note2
Junction Temperature
Operation Temperature
Storage Temperature
Lead Temperature (Soldering 10s)
Symbol
VCC
VPROG
VBAT
VCHRGb
IBAT
Pd
Pd
Tj
Top
Tsg
Rating
-0.3~8
-0.3~VCC
-0.3~8
-0.3~VCC
600
0.5
0.3
150
-45~85
-65~125
260
WS4518D
Unit
V
V
V
V
mA
W
W
oC
oC
oC
oC
Thermal resistance characteristics
Symbol
RJA1
RJA2
Parameter
Thermal Resistance, Junction to Ambient Note1
Thermal Resistance, Junction to Ambient Note2
Max.
125
165
Note1: Surface mounted on FR4 Board using 1 in sq pad size, 2oz Cu.
Note2: Surface mounted on FR4 board using the minimum recommended pad size, 2oz Cu.
Unit
OC/W
OC/W
Will Semiconductor Ltd.
4 Apr, 2016 - Rev. 1.3

4페이지










WS4518D 전자부품, 판매, 대치품
WS4518D
1.0
0.8
0.6
0.4
0.2 VCC = 5.0 V
VBAT = 4.4 V
0.0
2.0 2.1 2.2 2.3 2.4 2.5 2.6
VPROG ( V )
PROG Pin Pull-Up Current vs PROG Pin Voltage
18
16
14
12
10
8
6
4 VCC = 5.0 V
VBAT = 4.0 V
2 RPROG=10KΩ
0
01234567
VCHRGb ( V )
CHRGb Pin Current vs CHRGb Pin Voltage
0
-200 VCC = 5 V
VBAT = 4.4 V
-400
-600
-800
-1000
-1200
-1400
-1600
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VPROG ( V )
PROG Pin Clamp Current vs PROG Pin Voltage
4.26
4.24
4.22
4.20
4.18
4.16
4.14
4.12
4.10
4.08
4.06
4.04
4.02
RPROG=10KΩ
RPROG=20KΩ
RPROG=50KΩ
4.00
4.0 4.5 5.0 5.5 6.0
VCC ( V )
Float Voltage vs Supply Voltage
6.5
4.30
4.25
4.20
4.15
4.10
4.05
4.00
-50
-25
0
VCC = 5.0V
RPROG=10KΩ
RPROG=20KΩ
RPROG=50KΩ
25 50 75 100
Temperature ( OC )
Float Voltage vs Ambient Temperature
120
110
100
90
80
70
60 VCC = 5 V
50 RPROG = 10 K
40 -40oC
30 25oC
20 85oC
10
2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
VBAT ( V )
Charge Current vs Battery Voltage
Will Semiconductor Ltd.
7 Apr, 2016 - Rev. 1.3

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