16-CHANNEL CONSTANT CURRENT LED DRIVER WITH 12-bit PROGRAMMABLE PWM OUTPUTS

General Description

 DM631B is a 16-channel constant current sink LED driver. Each channel has independent 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, and built-in LED open detection circuit to detect error status. It combines the selections with rising / falling edge serial out, auto-reload/one-shot PWM output, internal/external grayscale clock source. It is specifically designed for LED display or lighting applications.

 Features

l Constant-current outputs: 5mA to 60mA adjustable by one external resistor

l bit linear PWM control current outputs for each channel z Maximum output voltage: 17V

l Maximum clock frequency: 25MHz

l  Auto-Reload / One-Shot Mode selection.

l Serial out clock edge selection – Rising / Falling edge selection

l  Internal / External PWM clock mode selection

l  Built-in real-time open detection

l  Package and pin assignment compatible to conventional LED drivers (DM134/5/6, DM13C)  Power supply voltage: 3.3V to 5V

l  Schmitt Trigger input

l  Output channel delay