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