AN4350 Datasheet, PDF (1/34 Pages) STMicroelectronics – High power factor LED driver with constant voltage regulation based on HVLED815PF

AN4350
Application note
High power factor LED driver with constant voltage regulation based
on HVLED815PF
Giovanni Gritti
Introduction
The EVLHVLED815W8CV demonstration board shows how to implement a high power
factor LED driver with a constant voltage regulation, using the single-stage primary side
HVLED815PF controller.
The HVLED815PF device is an integrated power controller with primary side control to
achieve the LED current regulation within ± 5%.
It also has a primary side voltage regulation and this AN shows how to reach the high power
factor with the constant voltage (CV) regulation.
The device incorporates an 800 V avalanche rated FET and fits in a standard SO-16
package. An internal start-up circuit eliminates the need for an external start circuitry
reducing the component counts/space and increases system efficiency.
Figure 1. Demonstration board - top side view
February 2014
DocID025181 Rev 1
1/34
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