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YB1508 Datasheet(PDF) 3 Page - YOBON TECHNOLOGIES,INC.

Part # YB1508
Description  Step-up DC-DC Converter , White LED Driver
PDF  7 Pages
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Manufacturer  YOBON [YOBON TECHNOLOGIES,INC.]
Direct Link  http://www.yobon.com.tw
Logo YOBON - YOBON TECHNOLOGIES,INC.

YB1508 Datasheet(HTML) 3 Page - YOBON TECHNOLOGIES,INC.

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YB1508
Step-up DC-DC Converter , White LED Driver
YB1508 MRev1.4
WWW.YOBON.COM.TW
3
Function Parameter
Conditions
Min
Typ
Max
Units
Input Voltage Range
2.7
9
V
Feedback Voltage
Iout =20mA, Vout = 12.5V
Circuit of figure 1. (L=22uH
Cout =4.7uF)
Rfb = 10 ohms
180
200
220
mV
FB Pin Bias current
2
10
20
μA
Vfb = 0.3V
3.5
mA
Supply current
CTRL = 0V
1
μA
Switching Frequency
0.7
0.8
1.3
MHz
Maximum Duty Cycle
93
%
Minimum duty cycle
20
25
35
%
Switch Vcesat
At Isw = 200mA
200
mV
Switch Current Limit
40% duty cycle
250
mA
Switch Leakage Current
Ctrl = 0.3V
1
μA
VCTRL for Full LED current
1.6
1.7
1.8
V
CTRL Pin Bias Current
Ctrl = 2V
20
μA
Chip turn off delay
30
μS
YB1508
36
Over Voltage Protection
YB1508P
21
V
Absolute Maximum Ratings
Electricity Characteristics
Table 3：
(TA=25°C, Vin=3.3V Cin=1uF Cout=4.7uF unless otherwise noted)
Maximum Junction Temp,Tj
150 °C
Lead Temperature (Soldering 10
sec)
300 °C
Thermal Resistance
195 °C
SW voltage
40V
All other pins
10V



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