ST2226A SiTi, ST2226A Datasheet - Page 2

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

www.DataSheet4U.com
ST2226A
General Description
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 mA. Time division operation allows driving up to 1
or 2 LEDs with a single output channel (mode-1 and mode-2 respectively).
Block Diagram
The ST2226A is a LED driver incorporating shift registers, data latches, 16-channel
ST2226A
CMD[2:0]
Rext
GCLK
DCLK
DIN
點晶科技股份有限公司
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
點晶科技股份有限公司
點晶科技股份有限公司
PWM-Controlled Constant Current Driver
Reference
Operation
Counter
Control
Voltage
PWM
Figure 1. Functional block diagram
for LED Displays
Version ： ： ： ： A.010
(10 Bit ｘ 16-Channel ｘ 2LED)
IOUT0
Shift Register and Latch
(16-Channel)
(16-Channel)
Comparator
Driver
……
IOUT15
Page ： ： ： ： 1
ST2226A
DOUT