ST STP24DP05 LED恒流驱动方案
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 8x3 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...
