Key facts
- Brand
- STMicroelectronics
- Model
- AN2531
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-06
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STMicroelectronics AN2531 Generating Multicolor Light Using RGB LEDs Application Note
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.
STMicroelectronics AN2531 specifications
| Constant current range per channel | 80‑500 mA |
|---|---|
| Maximum board current capability | 700 mA total (2 × 350 mA) |
| LED driver part number | STP04CM596 |
| Temperature sensor part number | STLM20 |
Source: ST AN2531 Application note Generating multicolor light using RGB LEDs Manual
All STMicroelectronics AN2531 documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What components are used in the STEVAL-ILLOO9V1 reference board?
The board uses STP04CM596 LED drivers, an STLM20 temperature sensor, and is designed for up to 700 mA per LED.
From: STMicroelectronics AN2531 Generating Multicolor Light Using RGB LEDs Application Note
What is the maximum current per LED for the STEVAL-ILLOO9V1 reference board?
The board was designed for driving LEDs with a current up to 700 mA per LED.
From: STMicroelectronics AN2531 Generating Multicolor Light Using RGB LEDs Application Note