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WD3171 Datasheet(PDF) 5 Page - Will Semiconductor Ltd.

Part # WD3171
Description  38V Step-Up Backlight White LED Driver with Flash Mode
PDF  18 Pages
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Manufacturer  WILLSEMI [Will Semiconductor Ltd.]
Direct Link  http://www.willsemi.com/index.php?siteid=2
Logo WILLSEMI - Will Semiconductor Ltd.

WD3171 Datasheet(HTML) 5 Page - Will Semiconductor Ltd.

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WD3171
Will Semiconductor Ltd.
5
2018/06 - Rev. 1.1
Typical Characteristics
(Ta=25oC, VIN=3.6V, VEN=VIN, CIN=COUT=1
μF, L=10μH, 10 LEDs, unless otherwise noted)
Efficiency vs. LED Current
Efficiency vs. LED Current
Efficiency vs. LED Current
LED Current vs. Duty Cycle
LED Current vs. Duty Cycle
LED Current vs. Duty Cycle
0
4
8
12
16
20
50
60
70
80
90
100
LED Current (mA)
10 LEDs
V
IN
=3.0V
V
IN
=3.6V
V
IN
=4.2V
V
IN
=5.0V
0
20
40
60
80
100
0
5
10
15
20
Duty (%)
f=25KHz,10s LEDs
V
IN
=3.0V
V
IN
=3.6V
V
IN
=4.2V
V
IN
=5.0V
0
20
40
60
80
100
0
10
20
30
40
Duty (%)
f=25KHz, 6s2p LEDs
V
IN
=3.0V
V
IN
=3.6V
V
IN
=4.2V
V
IN
=5.0V
0
2
4
6
8
10
0.0
0.5
1.0
1.5
2.0
2.5
Duty (%)
f=25kHz,10s LEDs
V
IN
=3.0V
V
IN
=3.6V
V
IN
=4.2V
0
10
20
30
40
50
60
70
80
90
100
LED Current (mA)
V
IN
=3.6V
2p6s LEDs
2p5s LEDs
10LEDs
0
10
20
30
40
50
60
70
80
90
100
LED Current (mA)
6s2p LEDs
V
IN
=3.0V
V
IN
=3.6V
V
IN
=4.2V
V
IN
=5.0V



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