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参数资料
| 型号： | YB1520ST25 |
| 厂商： | YOBON TECHNOLOGIES, INC. |
| 元件分类： | DC/DC变换器 |
| 英文描述： | High Power Step-up DC-DC Converter, White LED Driver |
| 中文描述： | 高功率升压型DC - DC转换器，白光LED驱动器 |
| 文件页数： | 12/18页 |
| 文件大小： | 1900K |
| 代理商： | YB1520ST25 |
YB1520
High Power Step-up DC-DC Converter, White LED Driver
YB1520 MRev.1.2
www.yobon.com.tw
3
Absolute Maximum Ratings
Vin..........................................................................20V
SW Voltage ............................................................36V
FB Voltage ...............................................................5V
CTRL Voltage...........................................................5V
Maximum Junction Temp, TJ (not 2)...................150°C
Lead Temperature (Soldering 10 sec) ................300°C
Thermal Resistance............................................195°C
Electricity Characteristics
Recommended Operating Conditions
Operating Temperature (note 3)................ –40°C~85°C
Supply Voltage............................................. 2.5V~16V
SW Voltage ............................................................30V
(TA=25°C, Vin=3.3V, Cin=1uF Cout=10uF unless otherwise noted)
Note:
Absolute maximum ratings are limits beyond which damage to the device may occur. The maximum allowable power dissipation is a
function of maximum function temperature, TJ(max), the junction to ambient thermal resistance, θJA , and the ambient temperature.
The maximum allowable, power dissipation at any ambient temperature is calculated using: PD(MAX)= [TJ(max)-TA]/θJA . Exceeding
the maximum allowable power dissipation will cause excessive die temperature. All limits at temperature extremes are guaranteed via
correlation using standard statistical methods
Symbol
Function Parameter
Test Conditions
Min
Typ
Max
Units
Vin
Input Voltage Range
2.7
16
V
Not Switching
Vfb = 0.3V
1.2
1.5
1.7
mA
IQ
(Quiescent
Current)
Shutdown
CTRL = 0V
0.3
1
uA
VFB
Feedback Voltage
Iout=20mA,Vout=12.5V
Circuit of Figure 1
180
200
220
mV
ICL
100% Duty Cycle
850
900
950
mA
ILIM
Switch Current Limit
40% Duty Cycle
600
mA
IB
FB Pin Bias Current
Vfb=200mV
2
10
20
uA
FRSW
Switching Frequency
680
700
720
KHz
DTMX
Maximum Duty Cycle
85
%
DTMN
Minimum Duty Cycle
20
25
%
VSAT
Switch Vcesat
At Isw = 200mA
120
mV
ILKG
Switch Leakage Current
Ctrl = 0.3V
1
μA
Full On
1.7
1.8
V
VCTL
VCTRL for Full LED
Current
Full Off
0.2
0.3
V
ICTL
CTRL Pin Bias Current
Ctrl = 2V
20
μA
OVP
Over Voltage Protection
34
V
θJA
Thermal Resistance
220
°C/W
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