st2226b Silicon Touch Technology Inc., st2226b Datasheet - Page 16

• Manufacturer Part Number: st2226b
• Description: Pwm-controlled Constant Current Driver For Led Displays
• Manufacturer: Silicon Touch Technology Inc.

4) Power Rating
5) Advantages for application
please refer to the following Figure 9.
in MODE 1 operation, the frame rate is 60Hz, DCLK & GCLK both run at 10MHz. We
can shift in (1/60Hz)/(1/10MHz)=167K bits per frame. One channel takes 10 bits, thus
167K/10=16.7K channels (single color pixels). For two dimension display, we take the
square root of 16.7K pixels, which equals 129. The resolution, in this case is 129*129.
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).
ST2226B
For the relationship between power dissipation and operating temperature,
To understand what the advantages over ON-OFF type drivers, we assume that
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SILICON TOUCH TECHNOLOGY INC.
3.5
2.5
1.5
0.5
Figure 9. Power Dissipation vs. Operating Temperature
3
2
1
0
0
50
T a (F ree-A ir T em perature) - C
Version
S D IP
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A.002
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S O P
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ST2226B
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