STMicroelectronics – 16-channel driver suitable for LED panel displays


The LED1642GW is a monolithic, low-power 16-bit shift register for LED panel displays.

The LED1642GW can provide a 20V output to drive LEDs, and enables the user to connect several LEDs in series.

In the output stage, 16 regulated current sources provide a constant current which can range between 3mA and 40mA to drive the LEDs. The current value is programmed via an external resistor, and may be adjusted by a 7-bit current-gain register in two sub-ranges. The brightness can be adjusted separately for each channel through 12-/16-bit greyscale control.

Programmable turn-on and turn-off time, with four diff erent values, enables designers to keep to a minimum the eff ect of noise generated by the power circuit.

A selectable gradual output delay reduces the inrush current. The selectable synchronisation feature works when the device is used in a daisy-chain configuration.


  • Open/short error detection
  • Automatic power shut-down
  • Automatic power-on
  • 30MHz clock frequency
  • Supply-voltage range: 3V to 5.5V
  • Output thermal shut-down at 170°C


  • LED panel displays

The X-NUCLEO-LED16A1 is an STM32 Nucleo expansion board which implements an application for the LED1642GW 16-channel LED driver. Multiple drivers can be cascaded by coupling X-NUCLEO-LED16A1 expansion boards.

Orderable Part Number: X-NUCLEO-LED16A1

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