型号：LM3445MM

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LM3445MM

LM3445MM

LM3445MM

规格信息：制造商:Texas Instruments

产品种类:LED照明驱动器

工作温度:+ 125 C

安装风格:SMD/SMT

封装 / 箱体:MSOP

商标:Texas Instruments

工作温度:- 40 C

电源电流—值:2850 uA

宽度:3 mm

The LM3445 is an adaptive constant off-time AC/DC1• TRIAC Dim Decoder Circuit for LED Dimmingbuck (step-down) constant current controller designed• Application Voltage Range 80 VACto 277 VACto be compatible with TRIAC dimmers. The LM3445• Capable of Controlling LED Currents Greaterprovides a constant current for illuminating highThan 1 Apower LEDs and includes a TRIAC dim decoder. Thedim decoder allows wide range LED dimming using• Adjustable Switching Frequencystandard TRIAC dimmers. The high frequency• Low Quiescent Currentcapable architecture allows the use of small external• Adaptive Programmable Off-Time Allows forpassive components. The LM3445 includes a bleederConstant Ripple Currentcircuit to ensure proper TRIAC operation by allowingcurrent flow while the line voltage is low to enable• Thermal Shutdownproper firing of the TRIAC. A passive PFC circuit• No 120-Hz Flickerensures good power factor by drawing current directly• Low Profile 10-Pin VSSOP Package or 14-Pinfrom the line for most of the cycle, and provides aSOICconstant positive voltage to the buck regulator.Additional features include thermal shutdown, current• Patented Drive Architecturelimit and VCCunder-voltage lockout.

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