T8LED驱动

Design Example Report
Title
High Efficiency (>90%), High Power Factor
(>0.97), Low A-THD (<15%), 20 W Output Non-
Isolated Buck LED Driver Using LinkSwitchTMPL
LNK460KG
Specification 195 VAC – 265 VAC Input;
85 VTYP, 240 mA Output
Application T8 LED Tube
Author Applications Engineering Department
Document
Number

Date May 10, 2013
Revision 1.2
Summary and Features
 Low cost, low component count (29 parts), small size (height <8 mm), and single-sided PCB
 Single-stage power factor correction and constant current (CC) output
 Highly energy efficient, >90%
 Integrated protection and reliability features
 Output short-circuit protection with auto-recovery
 Auto-recovering thermal shutdown with hysteresis
 No damage during brown-out conditions
 PF >0.97, % ATHD <15% at nominal 230 VAC input
 Easily meets Class C harmonic requirement (>25 W) even with multiple tubes in parallel
operation
 Meets 1 kV differential line surge and EN55015 conducted EMI