LM3444 - AC-DC 离线式 LED 驱动器

LM3444是TI德州仪器公司的一款LED照明-照明产品，LM3444是AC-DC 离线式 LED 驱动器，本站介绍了LM3444的封装应用图解、特点和优点、功能等，并给出了与LM3444相关的TI元器件型号供参考。

LM3444 - AC-DC 离线式 LED 驱动器 - LED照明-照明 - LED驱动器 - 德州仪器

产品描述

The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC under-voltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.

产品特性

Application Voltage Range 80VAC – 277VAC
Capable of Controlling LED Currents Greater than 1A
Adjustable Switching Frequency
Low Quiescent Current
Adaptive Programmable Off-time Allows for Constant Ripple Current
Thermal Shutdown
No 120Hz Flicker
Low Profile 10-Pin VSSOP Package or 8-Lead SOIC Package
Patent Pending Drive Architecture

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