點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

DM164

8x3-CHANNEL CONSTANT CURRENT LED DRIVERS

Version:A.002

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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

mode

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 >130

Shutdown (junction temperature > 170

◆

One-Shot Option

◆

Built-in Buffer for Data, PWM Clock, Latch signal and Data Clock

◆

Average Separate IOUT PWM Waveform Option

Package

LQFP48 (7mmX7mm), QFN48 (7mmX7mm)

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