點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM134B、DM135B
DM134B、DM135B
16-Bit Constant Current LED Drivers with
3.3v ~ 5v Supply Voltage
General Description
The DM134B、DM135B are constant current drivers specifically designed for LED display
applications. The value of constant current can be varied using an external resistor. The devices
include a 16-bit shift register, latches, and constant current drivers on a single Silicon CMOS
chip.
Features
z 3.3V~5V CMOS Compatible Input
z Maximum Clock Frequency: 25MHz (Cascade Operation)
z Maximum Output Voltage: 17V
z Package:
DIP24, SOP24, SSOP24, QFN32
z Package and Pin Layout: Pin layout and functionality are similar to those of the ST2221C.
(Each characteristic value is different.)
z Constant Current Matching: (Ta = 25°C、VDD = 5.0V)
Chip-to-Chip: ± 10.0%
Bit-to-Bit:
DM134B:± 4.0% @ IOUT = 30 ~ 90mA
± 6.0% @ IOUT = 20 ~ 30mA
DM135B:± 4.0% @ IOUT = 20 ~ 60mA
± 6.0% @ IOUT = 5 ~ 20mA
16-Bit Constant Current LED Drivers
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Version:A.006