ST2226B
Description
The ST2226B 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 of 60 m A. Time division operation allows driving up to 1 or 2 LEDs with a single output channel (mode-1 and mode-2 respectively).
Block Diagram.
IOUT0
……
IOUT15
Rext Voltage Reference
Driver (16-Channel)
GCLK
PWM Counter parator (16-Channel)
CMD[2:0]
DCLK DIN
Operation Control
Shift Register and Latch (10 Bit ｘ 16-Channel ｘ 2LED)
DOUT
Figure 1. Functional block diagram
Version：A.002
Page：1
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Features
˙ Constant current outputs with current value settings by an external resistor ˙ Maximum output current: 60 m A ˙ Time division output allows the driving of 1 or 2 LEDs with a single output ˙ Maximum / minimum output...
