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

• 3.3V~5V CMOS Compatible Input

• Maximum Clock Frequency: 25MHz (Cascade Operation) 

• Maximum Output Voltage: 17V

• Package: DIP24, SOP24, SSOP24, QFN32

• Package and Pin Layout: Pin layout and functionality are similar to those of the ST2221C.

                                        (Each characteristic value is different.)

• 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