The STEVAL-ILL031V1 is a digital constant-current controller for LED driving based on the STM8S208x. It has a DC input voltage of 48V and adapts the output voltage through the Buck stage to drive LEDs with the selected current. The controller allows driving of 4 LED strings, managing up to 120W. Using 3W LEDs, each string can obtain 30W (10 LEDs in series in each string). Additionally, it features low voltage-sensing circuitry, logic level MOSFETs driven by the microcontroller without a gate driver (ground referred), and high efficiency (up to 98%).
The STEVAL-ILL031V1 is a demonstration board designed to present a digital approach to real average current control for LED streetlighting platforms. It utilizes a DC-DC "inverse buck" converter architecture to manage power efficiently.
| DC input voltage | 48 V |
|---|---|
| Number of DC-DC buck converters | Four |
| Maximum power per string | 30 W |
| Maximum efficiency | 98% |
| Microcontroller basis | STM8S208x |
The device supports a maximum DC input voltage of 48 V.
Four DC-DC buck converters allow driving of 4 LED strings.
The board is designed to obtain 30 W-per-string using 3 W LEDs.