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SiTi |
DM164
Version
Issue Date
File Name
Total Pages
: A.001
: 2007/09/04
: SP-DM164-A.001.doc
: 28
8x3-CHANNEL CONSTANT CURRENT LED DRIVER
新竹市科學園區展業一路 9 號 7 樓之 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
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM164
DM164
8x3-CHANNEL CONSTANT CURRENT LED DRIVERS
General Description
The DM164 is a LED current sink driver incorporating independent shift registers and
data latches for grayscale PWM data (GD mode*1) and current adjustment data (D&G
mode*1), 8x3-channels constant current circuitry with current value set by 3 external
resistors, 65,536 grayscale PWM function unit, 128 levels current adjustment for each
channel and 256 levels global brightness control (White balance). Each channel provides
maximum current of 90mA. The DM164 also supports the LED open detection capability,
thermal alarm and shutdown function. There are two methods to communicate error
signals to the system. One is through serial output data to indicate which channel has
failure. The other is by means of dedicated Alarm pin.
Features
◆ Constant current outputs with current value set by 3 external resistors.
◆ Max PWM clock frequency
Cascade: 36MHz@VDD=3.3V(Refresh rate≒550Hz), 40MHz@VDD=5V (610Hz)
◆ Max data clock frequency
Cascade: 30MHz@VDD=3.3V, 35MHz@VDD=5V
◆ Maximum output current: 90mA
◆ Maximum output voltage: 17V
◆ 16-bit grayscale for each LED
◆ 8-bit current adjustment for global brightness control (White Balance)
◆ 7-bit current adjustment for each LED (Dot Correction)
◆ Supply Voltage: 3V to 5.5V
◆ LED Open Detection
◆ Thermal Alarm and Shutdown
Alarm (junction temperature >130oC)
Shutdown (junction temperature > 170oC)
◆ One-Shot Option
◆ Built-in Buffer for Data, PWM Clock, Latch signal and Data Clock
◆ Average Separate IOUT PWM Waveform Option
Package
z LQFP48 (7mmX7mm), QFN48 (7mmX7mm)
*1: See Page 10
8x3-CHANNEL CONSTANT CURRENT LED DRIVERS
Version:A.001
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