8-Channel Constant Current LED Driver With 256 Steps Global Current Control

The MY9182, 8 channel constant current LED driver with 256 steps global current control, operates over a 3 ~ 5.5V input voltage range. The device provides total 8 open-drain constant current sinking outputs that are rated to 17V and delivers up to 120mA of high accuracy current to each string of LED. The current at each output is programmable by means of one external resistor and can be fine tuned by 256 steps. The MY9182 features the fast 25MHz DCK input, allowing large amount data transfer and a wide LED dimming (on/off) range to be implemented.

The MY9182 also offers 4-wire serial interface, 8-bit shift registers, and 8-bit latches. The serial interface allows a microcontroller to configure the output channels using four inputs (DI, DCK, LAT, and ENB) and a data output (DO). DO allows multiple drivers to be cascaded and operated together.

The MY9182’s on-board pass elements minimize the need for external components, while at the same time, providing ±1% LED current accuracy. Additional features include a ±0.1% regulated output current capability and 50ns fast output transient response.

The MY9182 is available in a 16-pin SOP/SSOP package and operating over the -40°C to +85°C ambient temperature range.