DM631B

DM631B Version : PRE.001 Issue Date : 2008/09/12 File Name : SP-DM631B-PRE.001.doc Total Pages : 31 16-CHANNEL CONSTANT CURRENT LED DRIVER WITH 12-bit PROGRAMMABLE PWM OUTPUTS 9 7 1 SILICON TOUCH TECHNOLOGY INC. 9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 SILICON TOUCH TECHNOLOGY INC. 9 7 1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 DM631B DM631B 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 z Constant-current outputs: 5mA to 60mA adjustable by one external resistor z 12-bit linear PWM control current outputs for each channel z Maximum output voltage: 17V z Maximum clock frequency: 25MHz z Auto-Reload / One-Shot Mode selection. z Serial out clock edge selection – Rising / Falling edge selection z Internal / External PWM clock mode selection z Built...