16-Bit Constant Current LED Drivers

 with LED Open/Short Detection

General Description

         The DM133 is a constant current driver specifically designed for LED display applications. The device includes a 16-bit shift register, two latches, and constant current drivers on a single Silicon CMOS chip. Its built-in open/short detection and thermal alarm circuits help the user to detect the overheating of the IC and LED failures. Its user-friendly design allows the user to adjust the output current (5~60mA) by using an external resistor. The current also can be further tuned by 6-bit serial shift-in data.

Features

• Constant Current Output:          Current with one resistor for 5mA to 60mA 

• Maximum Clock Frequency:       25MHz (Max.) 

• Power Supply Voltage:               3.3V to 5.0V 

• CMOS Compatible Input/Output

• Package: HSOP28, SSOP28, QFN32 

• Constant Current Matching: 

                                                          10mA ~ 60mA : Bit-to-Bit : ± 4.0% (Max)、 

                                                           Chip-to-Chip: ± 10.0% (Max) 

                                                           5mA ~ 10mA : Bit-to-Bit : ± 6.0% (Max)、

                                                           Chip-to-Chip: ± 12.0% (Max)

• Maximum Output Voltage:          17V 

• Thermal Alarm Function:             Error signal output when junction temperature exceeds limit 

• LED Open/Short Detection:         Error signal output when LED is failed

•  6 bit Linear Global Current Adjustment