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LM3447 Datasheet PDF

Part Series:LM3447 Series
Category:LED Drivers
Description:Phase Dimmable, Primary Side Power egulated, PFC Flyback Controller for LED Lighting 14-TSSOP -40℃ to 125℃
Document:LM3447-A19-120VEVM Datasheet PDF (35 Pages)

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LM3447MT/NOPB - TI Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Number of Pins
14 Pin
Case/Package
TSSOP-14
Number of Outputs
1 Output
Output Voltage
19 V
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LM3447MT/NOPB - TI Function Overview

The LM3447 is a versatile power factor correction (PFC) controller designed to meet the performance requirements of residential and commercial phase-cut dimmer compatible LED lamp drivers. The device incorporates a phase decoder circuit and an adjustable hold current circuit to provide smooth, flicker free dimming operation. A proprietary primary side control technique based on input voltage feedforward is used to regulate the input power drawn by the LED driver and to achieve line regulation over a wide range of input voltage. Valley switching operation is implemented to minimize switching loss and reduce EMI. An internal thermal foldback circuit is provided to protects the LEDs from damage based on the temperature sensed by a single external NTC resistor. Additional features include LED open circuit and short circuit protection, cycle-by-cycle FET over-current protection, burst mode fault operation using an internal 812ms fault timer and internal thermal shutdown.
The LM3447 is ideal for implementing dimmable, isolated single stage LED lamp drivers where simplicity, low-component count and small solution size are of primary importance. This device is currently available in a TSSOP 14-pin package.
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