Datasheet Linear Technology LT3799EMSE#TRPBF — Datenblatt

Hersteller	Linear Technology
Serie	LT3799
Artikelnummer	LT3799EMSE#TRPBF

Offline isolierter Flyback-LED-Controller mit aktivem PFC

Datenblätter

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PDF, 935 Kb, Revision: B, Datei hochgeladen: Oct 4, 2017

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Preise

Verpackung

Package	MS-16E
Package Code	MSE
Package Index	05-08-1667

Parameter

Architecture	Offline Isolated Flyback
Demo Boards	DC1595A,DC1744A,DC1775A
Design Tools	LTspice File
Dimming	Triac
Export Control	no
Features	No Opto Isolator, Active PFC,
Frequency	300 kHz
Isupply	0.070 mA
Max Number of LEDs	Offline 4W to 100W+ LED Application
Monolithic	no
Number of Outputs	1
Operating Temperature Range	0 to 85 °C
Synchronous	no
Topology	Flyback, LED Driver

Öko-Plan

RoHS

Compliant

Konstruktionshinweise

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Offline LED Lighting Simplified: High Power Factor, Isolated LED Driver Needs No Opto-Isolators and is TRIAC Dimmer Compatible &mdash DN490
PDF, 125 Kb, Datei veröffentlicht: Mar 18, 2011
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Offline LED Lighting Simplified: High Power Factor, Isolated
LED Driver Needs No Opto-Isolators and is TRIAC Dimmer
Compatible вЂ“ Design Note 490
Wei Gu
Introduction
As environmental concerns over traditional lighting increase and the price of LEDs decreases, high power LEDs
are fast becoming a popular lighting solution for ofп¬‚ine
applications. In order to meet the requirements of ofп¬‚ine
lightingвЂ”such as high power factor, high efп¬Ѓciency, isolation and TRIAC dimmer compatibilityвЂ”prior LED drivers
used many external discrete components, resulting in
cumbersome solutions. The LTВ®3799 solves complexity,
space and performance problems by integrating all the
required functions for ofп¬‚ine LED lighting. opto-coupler. Its unique bleeder circuit makes the LED
driver compatible with TRIAC dimmers without additional
components. Open-and shorted-LED protection ensures
long term reliability.
No-Opto Operation
Figure 1 shows a complete LED driver solution. The LT3799
senses the output current from the primary side switch
current waveform. For a п¬‚yback converter operating in
boundary mode, the equation for the output current is:
IOUT = 0.5 IPK N (1 вЂ“ D)
IPK is the peak switch current, N is the primary to secondary turns ratio and D is the duty cycle. The IC regulates The LT3799 controls an isolated п¬‚yback converter in …

Modellreihe

Serie: LT3799 (4)

LT3799EMSE#PBF LT3799EMSE#TRPBF LT3799IMSE#PBF LT3799IMSE#TRPBF

Herstellerklassifikation

Power Management > LED Driver ICs > Offline LED Drivers
Power Management > Power Control > Offline Controllers/PFC

Andere Namen:

LT3799EMSETRPBF, LT3799EMSE TRPBF