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LR256 PDF预览

LR256

更新时间: 2024-10-29 12:26:39
品牌 Logo 应用领域
乐山 - LRC 开关
页数 文件大小 规格书
8页 215K
描述
Fast 1.2MHz Switching Frequency Requires Only 0.22uF Output Capacitor

LR256 数据手册

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LESHAN RADIO COMPANY, LTD.  
LR256 White LED Step-Up Converter  
¾
¾
¾
¾
¾
¾
¾
¾
Fast 1.2MHz Switching Frequency  
Requires Only 0.22uF Output Capacitor  
Inherently Matched LED Current  
High Efficiency: 85% Typical  
2.5V to 10V VIN ranges  
LR256 is a step-up DC/DC converter  
specifically designed to drive white LED with a  
constant current. It can drive two,three,or four  
LEDS. It switches at 1.2MHz and use tiny  
external components. The output capacitor can  
be as small as 0.22uF,which can save space  
and cost versus alternative solutions. Feedback  
voltage is as low as 95mV.  
Drives Up to Four series LEDs with a Li-lon cell  
Uses Very Tiny Inductors  
SOT-25 Package  
Absolute maximum ratings  
Parameter  
Supply Voltage  
symbol  
VIN  
value  
unit  
V
10  
10  
Feedback Voltage  
Switch Voltage  
FB  
V
SW  
VCE  
Topr  
Rstg  
Tj  
20  
V
CE Voltage  
10  
V
Operating temperature range  
Storage temperature range  
Junction temperature  
-25 to +70  
-55 to +150  
125  
Pin name  
Description  
Symbol  
SW  
Description  
Symbol  
VIN  
5
4
1
2
3
5Supply  
1Switch  
Voltage  
2GND  
GND  
FB  
3Feedback  
4Start-Up  
CE  
1/8  

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