STEVAL-ILL044V1
9 W Triac dimmable, high power factor, isolated LED driver based
on the HVLED815PF (for US market)
Databrief
Features
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+/- 5% primary-side current regulation, no
optocoupler
Fully isolated output
Low component count
Only 1 tight-tolerance component
High efficiency, >86%
High power factor >0.98
Low THD, < 20% over 90 V to 132 V range
Fits in 28 mm tubing
9 W output, for light equal to range from 40 W
to 60 W incandescent
Startup within 0.2 seconds
Dimmable over 90 V to 132 V voltage range
RoHS compliant
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.
June 2012
This is information on a product in full production.
Doc ID 023389 Rev 1
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STEVAL-ILL044V1
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