This document describes how to drive RGB LEDs, calculate power dissipation, design over temperature protection, use software PWM modulation, and implement over voltage protection for this type of application. The document also introduces the design concept of the STEVAL-ILL009V1 reference board and explains its features and characteristics.
The document describes methods for driving multicolor light using high-power RGB LEDs in various applications such as backlighting and automotive lighting. It details the use of STP04CM596 LED drivers controlled by a microcontroller via SPI to regulate color through software PWM modulation.
The guide covers essential design considerations, including calculating power dissipation for the driver circuits, implementing over-voltage protection, and designing over-temperature protection using sensors like the STLM20. It also provides reference board designs (STEVAL-ILLOO9V1, V3, V4, and V5) to demonstrate these concepts.
| Driver constant current range | 80-500 mA |
|---|---|
| Maximum communication frequency | 25 MHz |
The board uses STP04CM596 LED drivers, an STLM20 temperature sensor, and is designed for up to 700 mA per LED.
The board was designed for driving LEDs with a current up to 700 mA per LED.
The maximum communication frequency for this driver is 25 MHz.