ST2226A SiTi, ST2226A Datasheet

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ST2226A

Manufacturer Part Number
ST2226A
Description
PWM-Controlled Constant Current Driver
Manufacturer
SiTi
Datasheet

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ST2226A
PWM-Controlled Constant Current Driver for LED
Displays
Version
Issue Date
File Name
Total Pages
新竹市科學園區展業一路 9 9 9 9 號
新竹市科學園區展業一路
新竹市科學園區展業一路
新竹市科學園區展業一路
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Pard,
Hsin-Chu, Taiwan 300, R.O.C
Tel:886-3-5645656
:
:
:
:
23
A.010
2004/04/12
SP-ST2226A-A.010.doc
Fax:886-3-5645626
號 7 7 7 7 樓之
樓之 1 1 1 1
樓之
樓之

Related parts for ST2226A

ST2226A Summary of contents

Page 1

... SILICON TOUCH TECHNOLOGY INC. 9-7F-1, Prosperity Road I, Science Based Industrial Pard, Hsin-Chu, Taiwan 300, R.O.C Tel:886-3-5645656 A.010 2004/04/12 SP-ST2226A-A.010.doc 23 號 樓之 樓之 號 號 樓之 ...

Page 2

... PWM-Controlled Constant Current Driver General Description The ST2226A is a LED driver incorporating shift registers, data latches, 16-channel constant current circuitry with current value set by an external resistor, 1024 gray level PWM (Pulse Width Modulation) functional unit and time division capability. Each channel can provide a maximum current ...

Page 3

... Storage temperature range (T ST2226A , OUT ) OUT = 50 or less) 2.50, SDIP28 ℃ a 1.32, SOP28 2.92, QFN32 ) 40.0, SDIP28 ja 75.9, SOP28 34.2, QFN32 ) - -55 to 150 stg Version : : : : A.010 ST2226A V +0 ℃ ℃ ℃ Page : : : : 2 ...

Page 4

... IOUT2 15 IOUT3 16 IOUT4 17 IOUT5 18 IOUT6 19 IOUT7 20 IGND 21 IGND 22 IOUT8 23 IOUT9 24 IOUT10 25 IOUT11 26 IOUT12 27 IOUT13 28 Version : : : : A.010 ST2226A NAME IOUT14 IOUT15 GND DOUT GCLK DCLK REXT CMD[2] CMD[1] CMD[0] DIN VDD IOUT0 IOUT1 Page : : : : 3 ...

Page 5

... IOUT0 14 IGND IOUT1 15 IOUT8 IOUT2 16 IOUT9 IOUT3 17 IOUT10 IOUT4 18 IOUT11 IOUT5 19 IOUT12 IOUT6 20 IOUT13 IOUT7 21 IOUT14 IGND 22 IOUT15 Version : : : : A.010 ST2226A DIN VDD 2 3 IOUT0 4 IOUT1 5 IOUT2 6 IOUT3 IOUT4 7 8 IOUT5 10 9 Pin No. NAME 23 GND 24 DOUT 25 ...

Page 6

... I Synchronous clock input for command and serial data transfer. The input data of DIN is synchronous to rising edges of DCLK, and transferred to DOUT on falling edges of DCLK. I Clock input for PWM operation. O LED driver outputs. Version : : : : A.010 ST2226A DESCRIPTION Page : : : : 5 ...

Page 7

... Thermal pad ST2226A O Driver current setting. LED current is set to a current value by connecting an external resistor between REXT and GND. - Power supply - Analog and digital ground - Two ground-pin for driver outputs. Version : : : : A.010 ST2226A Page : : : : 6 ...

Page 8

... TEST CONDITIONS DCLK / t High or low level GCLK / t High or low level CMD to DCLK DIN to DCLK DCLK to CMD CMD to DCLK DIN to DCLK DCLK to CMD Version : : : : A.010 ST2226A MIN NOM MAX 4.75 5 5. ...

Page 9

... REXT = 2K Rext = 2KΩ BG Rext = 2KΩ, OUT V = 2.0V OUT OL between OUT 40mA between OUT 40mA = 15pF, IOUT = 20mA L TEST CONDITIONS DOUT IOUT DOUT IOUT GCLK to IOUT Version : : : : A.010 ST2226A MIN NOM MAX 0 0 ±1 0.5 14 1.24 1.26 1.28 32 ±3 ±6 - ± ...

Page 10

... SILICON TOUCH TECHNOLOGY INC. Typical Control Method 1) Command Sequence To manipulate ST2226A, we should properly control the CMD, DIN, DCLK, and GCLK as following steps: 1. Issue command “Shift-in”, and then enter luminance data DIN. Note that ST2226A starts to shift-in data at the DCLK rising edge next to the edge which latched Shift-in command ...

Page 11

... GCLK 3) Phase Relationship of DCLK and GCLK Matching ST2226A’s GCLK and DCLK is an important step in the system design. If there is a certain length of delay between the rising edge of DCLK and of GCLK, the command “LED Emitting“& “LED Disable” will not be correctly recognized, which will then cause the display data loss ...

Page 12

... SILICON TOUCH TECHNOLOGY INC. Timing Diagrams ST2226A Figure 3. Timing Diagram Version : : : : A.010 ST2226A Page : : : : 11 ...

Page 13

... SILICON TOUCH TECHNOLOGY INC. Application Diagrams ST2226A Version : : : : A.010 ST2226A Page : : : : 12 ...

Page 14

... SILICON TOUCH TECHNOLOGY INC. Detailed Description 1) Time Division Operation Since ST2226A can drive 1 LED or 2 LEDs, the user can choose either MODE1 luminance data or MODE2 luminance data. After the luminance data is given, a command should be issued so that the driver can operate in MODE1 or in MODE2. ...

Page 15

... Version : : : : A.010 ST2226A … (MSB) D out Page : : : : 14 ...

Page 16

... Version : : : : A.010 ST2226A … … ...

Page 17

... Iout = (1.26 / Rext The full-scale current IOUT vs. Rext is shown in Figure 8. ST2226A Rext - Iout Rext (Kohm) Figure 8. Driver current as a function of R Version : : : : A.010 ST2226A EXT Page : : : : 16 ...

Page 18

... We can round the data a little bit, and we can construct a 128*128 image by connecting 1024 driver ICs. (1,024 EA drivers*16 channels 16,384 bit). ST2226A ree-A ir Tem perature Version : : : : A.010 ST2226A 100 150 ≒ Page : : : : 17 200 ...

Page 19

... Surely out of spec. Can’t realize in this configuration. System designs for ON-OFF type drivers thus need to reduce frame rate or the no. shift-in pixels or grayscale level for each pixel. ST2226A PWM ON-OFF 60 60 128 x 128 128 x 128 1024 1024 160 1 16.8Meg 10 MHz 1.0 GHz Version : : : : A.010 ST2226A 4 Page : : : : 18 ...

Page 20

... SILICON TOUCH TECHNOLOGY INC. Package Outline Dimension SDIP28 0.018typ. 0.060typ. ST2226A D 0.100typ. Version : : : : A.010 ST2226A SEATING PLANE DIMENSION IN INCH SYMBOLS MIN. NOM 0.015 ...

Page 21

... SILICON TOUCH TECHNOLOGY INC. SOP28 ST2226A Version : : : : A.010 ST2226A Page : : : : 20 ...

Page 22

... REF 0.18 0.23 0.30 5.00 BSC 1.25 2.70 3.25 5.00 BSC 1.25 2.70 3.25 0.50 BSC 0.30 0.40 0.50 0.10 Version : : : : A.010 ST2226A BOTTOM VIEW 0.10 0.10 0. 0.10 0.10 0. ...

Page 23

... Touch Technology, Inc. and its distributors and all their officers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such intention and manipulation. ST2226A Version : : : : A.010 ST2226A Page : : : : 22 ...

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