Electronic Components Datasheet Search |
|
LM3447 Datasheet(PDF) 1 Page - Texas Instruments |
|
|
LM3447 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 25 page VAC TSNS LM3447 FLT1 FLT2 BIAS HOLD AUX VCC FF INV COMP GATE ISNS GND + – + – LM3447 www.ti.com SNOSC65 A – APRIL 2012 – REVISED MAY 2012 Phase Dimmable, Primary Side Power Regulated PFC Flyback Controller for LED Lighting Check for Samples: LM3447 1 FEATURES DESCRIPTION The LM3447 is a versatile power factor correction • Integrated Phase Angle Decode (PFC) controller designed to meet the performance – Leading and Trailing Edge Compatible requirements of residential and commercial phase-cut – Over 50:1 Dimming Range dimmer compatible LED lamp drivers. The device incorporates a phase decoder circuit and an • Power Factor Correction with Low Total adjustable hold current circuit to provide smooth, Harmonic Distortion flicker free dimming operation. A proprietary primary • Primary Side Control Using Input Voltage side control technique based on input voltage Feedforward Technique feedforward is used to regulate the input power • Input Power Regulation Scheme with Improved drawn by the LED driver and to achieve line regulation over a wide range of input voltage. Valley Line Regulation switching operation is implemented to minimize • Constant Power Operation of LEDs to switching loss and reduce EMI. An internal thermal Compensate for Forward Voltage Variations foldback circuit is provided to protects the LEDs from Over Temperature and Lifetime damage based on the temperature sensed by a • Fixed Frequency Discontinuous Conduction single external NTC resistor. Additional features Mode Operation include LED open circuit and short circuit protection, cycle-by-cycle FET over-current protection, burst • Valley Switching Operation to Achieve High mode fault operation using an internal 812ms fault Efficiency and Low EMI timer and internal thermal shutdown. • Efficient TRIAC Hold Current Management The LM3447 is ideal for implementing dimmable, • Thermal Foldback Function for LED Protection isolated single stage LED lamp drivers where • LED Open Circuit and Short Circuit Protection simplicity, low-component count and small solution size are of primary importance. This device is APPLICATIONS currently available in a TSSOP 14-pin package. • Dimmable A19, R20, PAR30/38 LED Lamps • Recessed LED Downlights and Pendant Lights • Industrial and Commercial Solid State Lighting TYPICAL APPLICATION DIAGRAM 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Similar Part No. - LM3447 |
|
Similar Description - LM3447 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |