24-bit constant current LED sink driver with output error detection

Features
■ Low voltage power supply down to 3 V
■ 8 x 3 constant current output channels
■ Adjustable output current through external
resistors
■ Short and open output error detection
■ Serial data IN/parallel data OUT
■ Shift register data flow registers control
■ Accepts 3.3 V and 5 V micro driver
■ Output current: 5-80 mA
■ 25 MHz clock frequency
■ High thermal efficiency package

Description
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.