Document
DM413
Version : PRE.006 Issue Date : 2006/4/3 File Name : SP-DM413-PRE.006.doc Total Pages : 22
3-CHANNEL CONSTANT CURRENT LED DRIVERS WITH PROGRAMMABLE PWM OUTPUTS
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
DM413
DM413
3-CHANNEL CONSTANT CURRENT LED DRIVERS WITH PROGRAMMABLE PWM OUTPUTS
General Description DM413 is a PWM enabled LED driver specifically designed for LED lighting or display applications. It incorporates shift registers, data latches, 3-channel constant current circuitry with current value set by 3 external resistors, and built-in oscillator for PWM functioning. Data and clock buffer outputs are designed for cascading another chip. Additionally the Output Polarity Reverse function is designed for more high power LED applications.
Features z z z z z z Maximum constant current outputs: 100mA determined by three external resistors Maximum sinking output voltage: 17V Maximum serial-in clock frequency: 20 MHz Built-in buffers for cascading clock and data to next driver PWM free-running capability (refresh rate (~ 400 Hz) with internal oscillator (~ 6.5 MHz)) Selectable modes for PWM control: 8-bits luminance data with PWM current outputs (8 bits mode) 8-bits luminance data and 6-bits global brightness data (14 bits mode) 8-bits luminance data and 5-bits individual color correction data (13 bits mode) Output polarity reverse function TTL/CMOS compatible input Power supply voltage: 3.3V ~ 5.5V
z z z
Applications z z z LED Decorative Lighting Indoor/Outdoor LED Video or Message Display PWM Signal Generator
Package Types z SSOP16, SOP16
Version:PRE.006 Page 1
3-CHANNEL CONSTANT CURRENT LED DRIVERS
、、, Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
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
DM413
Block Diagram
GOUT GREX BOUT ROUT BREX RREX
VCC GND
Bandgap Reference
3 x Current Controller/Driver
POL Polarity Selector
14-bits Counter
3 x 14-bits PWM Generator
18 Internal Oscillator
24
Mode Selector B
40
STB
5 x 8-bits Latch
MOD Mode Selector A
40
SDO
DAI
5 x 8-bits Shift Register*1
DAO
CKI
CKO
*1
For 13-bits/5byte mode. For 14-bits/4byte mode, there are 4 x 8-bits S-Rs. For 8-bits/3byte mode, there are 3 x 8-bits S-Rs.
3-CHANNEL CONSTANT CURRENT LED DRIVERS
Version:PRE.006
Page 2
、、, Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
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
DM413
Pin Connection
DAO CKO MOD POL ROUT GOUT BOUT GND
1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9
VCC DAI CKI STB SDO RREX GREX BREX
Pin Description PIN No. 1 2 3 PIN NAME DAO CKO MOD FUNCTION Serial data output terminal. Clock output terminal. Input mode selection:.