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Product Descriptions

DM631 is a 16-channel constant current sink LED driver. Each channel has adjustable 12-bits (4096  steps)  grayscale  PWM  control  current  outputs.  It  incorporates  shift  registers,  data  latches,  constant  current  circuitry  with  current  value  set  by  an  external  resistor,  selectable  oscillator  source  for  PWM  function,  and  built-in  LED  open  detection  circuit  to  detect  error  status.  It  is  specifically  designed for LED display or lighting applications.

Products Features

z Constant-current outputs: 5mA to 90mA adjustable by one external resistor

z 12-bit PWM control current outputs for each channel

z Maximum output voltage: 17V

z Maximum clock frequency: 25MHz

z Selectable internal/external PWM reference clock

z PWM free-running capability (refresh rate (~4.4KHz) with internal oscillator (~ 18 MHz))

z Build-in real-time LED open detection

z Package and pin assignment (except QFN32) compatible to pure LED drivers series (ST2221C, DM134/5/6, DM13C)

z Power supply voltage: 3.3V to 5.5V

Products Applications

z Indoor/Outdoor LED Video Display

z LED Variable Message Signs (VMS) System

z LED Decorative Lighting

Specifications

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