SD6857TR

SD6857_Datasheet PRIMARY SIDE CONTROLLED LED CONTROLLER WITH PFC DESCRIPTION SD6857 is the primary side controlled LED controller with PFC. It adopts PFM technology for providing accurate constant current control with high average efficiency. With SD6857, opto-couple, secondary feedback control, loop compensation circuit can be eliminated for reducing cost. FEATURES * Active power factor correction (APFC) * PSR CC/CV * Ultra-low start-up current * Primary side control * Leading edge blanking * Pulse-Frequency Modulation(PFM) * VCC overvoltage/undervoltage protection * LED open/short circuit protection * Internal over temperature protection * Cycle by cycle current limiting * Open loop protection * Peak current compensation SOP-8-225-1.27 APPLICATIONS * LED lamp * Illuminance with AC input ORDERING INFORMATION Part No. SD6857 SD6857TR Package SOP-8-225-1.27 SOP-8-225-1.27 Marking SD6857 SD6857 Material Pb free Pb free Packing Tube Tape & reel HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http://www.silan.com.cn REV:1.1 2012.04.27 Page 1 of 8 BLOCK DIAGRAM SD6857_Datasheet ABSOLUTE MAXIMUM RATING Characteristics Supply voltage Input voltage on pin FB Input voltage on other pins Input current Operating junction temperature Operating temperature Range Storage temperature Range Symbol VDD VFB VIN IIN TJ Tamb TSTG Rating -0.3~25 -20~22 -0.3~ 5.3 -10~10 +160 -40~ +125 -55~+150 Unit V V V mA °C °C °C ELECTRICAL CHARACTERISTICS (unless otherwise specified, VCC=18V, Tamb=2...