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YB1315 Datasheet(PDF) 5 Page - YOBON TECHNOLOGIES,INC.

Part No. YB1315
Description  High Efficiency Charge Pump White LED Driver
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Maker  YOBON [YOBON TECHNOLOGIES,INC.]
Homepage  http://www.yobon.com.tw
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YB1315 Datasheet(HTML) 5 Page - YOBON TECHNOLOGIES,INC.

 
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Preliminary YB1315
High Efficiency Charge Pump White LED Driver
YB1315 Rev.0.1
www.yobon.com.tw
5
Typical Performance Characteristics
VIN =3.6V, CIN =4.7μF, C1=C2=0.47μF, COUT = 1μF, unless otherwise noted.
Efficiency vs. Supply Voltage (ILED=20mA)
Dimming Response
LED Efficiency
0
10
20
30
40
50
60
70
80
90
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
VI (V)
Time=500
μs/div
ILED1
DC
Coupled
20mA/Div
EN2/EN1
DC
Coupled
2V/Div
VIN=3.6V, ILED=20mA
5 LEDs connected,
f= 1k Hz
1X Mode, Software
Dimming Respons
Time=100
μs/div
VEN2/VEN1
DC
Coupled
5V/Div
VOUT
DC
Coupled
2V/Div
IIN
DC
Coupled
200mA/Div
Time=500
μs/div
ILED1
DC
Coupled
20mA/Div
EN2/EN1
DC
Coupled
2V/Div
VIN=3.6V, ILED=20mA
5 LEDs connected,
f= 32k Hz
Input and Output Voltage Ripple
LED1 Current VS Duty Cycle
Time=1
μs/div
VIN
AC
Coupled
50mV/Div
VOUT
AC
Coupled
50mV/Div
VIN=3.4V, 1.5X
ILED1=20mA
5LEDs connected
0
2
4
6
8
10
12
14
16
18
0
1020
3040
50
60
70
80
90
Du ty C y c l e ( % )


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