STP16DPP05 LED Sink Driver The STMicroelectronics STP16DPP05 LED sink driver is a low voltage 16-bit constant current device with output error detection. The STMicroelectronics STP16DPP05 LED sink driver provides 3 to 40 mA of constant current to drive the LEDs. This STMicroelectronics 16-bit shift register features open and short LED detection on the outputs and also offers 3.3V MCU-driving capability and 30 MHz clock frequency. The STP16DPP05 LED sink driver is designed for use in LED panel displays.