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ST STEVAL-ILL015V1 RGB LED调光解决方案

关键词:电源管理 LED驱动器

时间:2011-12-05 10:36:17       作者:ST       来源:STEVAL-ILL015V1

ST公司的STEVAL-ILL015V1是采用STP24DP05和STM32™ MCU的LED调光演示板,两个STP24DP05可连接16个RGB LED,采用ST1S010的高效开关DC/DC电源,DC电源电压从7.5V到18V,输入电流小于0.7A,LED电流调整.本文介绍了STP24DP05主要特性,典型应用电路图以及STEVAL-ILL015V1 LED调光演示板主要特性,电路图和材料清单.

STEVAL-ILL015V1 - LED dimmer demonstration board based on the STP24DP05 and STM32™ STP24DP05:24-bit constant current LED sink driver with output error detection

The STP24DP05 is a monolithic, low voltage, low current power 24-bit shift register designed for LED panel displays. The device contains a 8 x 3-bit serial-in, parallel-out shift register that feeds a 8 x 3-bit D-type storage register. In the output stage, twenty-four regulated current sources were designed to provide 5-80 mA constant current to drive the LEDs.

The 8 x 3 shift registers data flow sequence order can be managed with two dedicated pins. The STP24DP05 has a dedicated pin to activate the outputs with a sequential delay, that will prevent inrush current during outputs turn-ON.

The device detection circuit checks 3 different conditions that can occur on the output line: short to GND, short to VO or open line.
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