Part Number: LM3447
Function: Regulated PFC Flyback Controller for LED Lighting
Package: TSSOP 14-pin
Manufacturer: Texas Instruments
Pinouts:
Description
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.
Official Site : https://www.ti.com/product/lm3447
Features
1. Power Factor Correction with Low Total Harmonic Distortion
2. Primary Side Control Using Input Voltage Feedforward Technique
3. Input Power Regulation Scheme with Improved Line Regulation
4. Constant Power Operation of LEDs to Compensate for Forward Voltage
Variations Over Temperature and Lifetime
5. Fixed Frequency Discontinuous Conduction Mode Operation
Applications:
1. Recessed LED Downlights and Pendant Lights
2. Industrial and Commercial Solid State Lighting
LM3447 Datasheet PDF Download
Other data sheets are available within the file: LM3447MT, LM3447MTE, LM3447MTX
