This is information on a product in full production.

June 2012

Doc ID 023389 Rev 1

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STEVAL-ILL044V1

9 W Triac dimmable, high power factor, isolated LED driver based

on the HVLED815PF (for US market)

Databrief

Features

optocoupler

to 60 W incandescent

Description

The STEVAL-ILL044V1 demonstration board

showcases ST’s new LED driver chip,

HVLED815PF. It solves the problem of low-cost

drive circuitry for LED replacements for 40 W

incandescent or equivalent compact-fluorescent

lamps.

The HVLED815PF is a new integrated power

controller using primary-side control to achieve

LED current regulation within +/-5%. (It also has

primary-side voltage regulation, used here for

open load protection).

The device incorporates an 800 V avalanche-

rated FET and fits in a standard SO-16 package.

An internal startup circuit eliminates the need for

external rapid-start circuitry.

The PFC-flyback power converter operates in

transition mode for the highest efficiency and best

use of components. With the addition of a few

extra components the HVLED815PF is made to

draw near-sinusoidal input current from the AC

line. The circuit regulates LED current over a wide

range of line voltage and LED string voltage, and

is dimmable with standard Triac-based dimmers.

www.st.com