STEVAL-ILL031V1 Datasheet, PDF (1/6 Pages) STMicroelectronics – Digital constant-current controller for LED driving based on the STM8S208x

STEVAL-ILL031V1
Digital constant-current controller for LED driving
based on the STM8S208x
Data brief
Features
■ DC input voltage: 48 V
■ Buck stage adapts output voltage to drive
LEDs with selected current
■ Four DC-DC buck converters allow driving of 4
LED strings, managing up to 120 W
■ Employs 3 W LEDs to obtain 30 W-per-string
(10 LEDs in series in each string)
■ Low voltage-sensing circuitry
■ Logic level MOSFETs driven by the
microcontroller without gate driver (ground
referred)
■ High efficiency (up to 98%)
■ RoHS compliant
STEVAL-ILL031V1
Description
The purpose of the STEVAL-ILL031V1
demonstration board is to present a new digital
approach to performing real average current
control on an LED streetlighting platform.
This LED streetlight platform is developed on a
DC-DC “inverse buck” converter, taking
advantage of power switch control and
conditioning signal circuitry for current sensing.
Benefits of this design include low energy
consumption, low maintenance, and reduced size
and weight. The solution is customized for
streetlighting applications, but can be extended to
many other segments.
November 2010
Doc ID 17237 Rev 2
For further information contact your local STMicroelectronics sales office.
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