IS31LT3929

IS31LT3929 General Description Preliminary Features Power factor correction to > 0.9 3% typical current accuracy No loop compensation required Wide input voltage range: 85V to 265VAC Internal over-temperature protection Flyback configuration LED driver with integrated PFC and no feedback The IS31LT3929 is a primary side, peak current mode, isolated type HBLED driver. The device works at a constant frequency in discontinuous conduction mode to provide a constant power to the input. It eliminates the need for an opto-coupler, TL431, or any other type of secondary side feedback. It operates from an input voltage range of 85VAC to 265VAC. The IS31LT3929 integrates over current/voltage protection, as well as includes a thermal shutdown to halt the switching action in the case of abnormally high operating temperatures. Typical Operating Circuit Fuse 85~265Vac BD Applications AC/DC constant current LED driver General AC/DC power supply General LED Lighting TR C1 C3 R1 R3 D1 D4 LED1 R5 C6 R8 LEDn U1 VCC VSINE FSET NC R2 R4 3929 Q1 GATE CS FB GND Rcs http://www.DataSheet4U.net/ C2 D3 R6 C4 R7 C5 D2 Figure 1 Typical Operating Circuit Copyright © 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to o...