AN4314 Datasheet, PDF (1/31 Pages) STMicroelectronics – 25 W wide-range high power factor buck-boost converter demonstration board using the L6564H

AN4314
Application note
25 W wide-range high power factor buck-boost converter
demonstration board using the L6564H
Introduction
This application note describes a wide-range non-isolated 25 W regulated LED driver with
high power factor. The EVL6564H-25W-BB demonstration board is well-suited to the
Japanese market due to the broad use of standard 100 V_ac lighting applications and also
200 V_ac tubes in building automation systems.
The EVL6564H-25W-BB demonstration board has been designed in order to obtain the
highest possible power factor over the entire input mains voltage, remaining compliant to
EN55022 Class-B and keeping the average output current in a tight band with different LED
characteristics.
The board is based on ST's L6564H power factor controller and the SEA05L CC-CV
controller for LED current regulation in a non-isolated flyback configuration.
The form factor has been designed to fit into a standard LED driver case, facilitating the
replacement of the incandescent flood lamps up to 80-100 W power.
Figure 1. EVL6564H-25W-BB demonstration board using the L6564H
July 2013
DocID024821 Rev 2
1/31
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