Data brief

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November 2010

Doc ID 17237 Rev 2

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STEVAL-ILL031V1

Digital constant-current controller for LED driving

based on the STM8S208x

Features

LEDs with selected current

LED strings, managing up to 120 W

(10 LEDs in series in each string)

microcontroller without gate driver (ground

referred)

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.

STEVAL-ILL031V1

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