MY9268 Datasheet | MY-Semi

Description The MY9268, 16-channel c o n s t a n t c u r r e n t LED driver with 16bits grayscale M-PDM (Multiplex Pulse Density Modulation) control, supports dynamic 1/2, 1/4, 1/8 scanning applications. The distinctive M-PDM technology enhances the refresh rate of dynamic scanning systems without increasing the frequency of grayscale clock in order to prevent from EMI interference. And the technique of automatic black frame insertion could abate efficiently the influence of blurs caused by the scanning switch. The device operates over a 3V to 5.5V input voltage range and provides 1 6 open-drain constant current sinking outputs that are rated to 1 7 V and delivers up to 70m A of high accuracy current to each string of LED. The current at each output is programmable by means of an external current-sensing resistor and could be adjusted by 8bits linear global current control. By this advanced M-PDM approach, the frame refresh rate could be improved up to 16000Hz in dynamic 1/8 scanning systems and 32000Hz in dynamic 1/4 scanning systems when the grayscale clock is 16MHz. The MY9268’s on-board pass elements minimize the need for external ponents, while at the same time, providing ±1.5% LED current accuracy. Additional features include a ±0.1% regulated output current capability and 30ns fast output transient response. The MY9268 is available in a 24-pin SOP/SSOP/TSSOP /QFN package and specified over the -40°C to +85°C ambient temperature range. Applications ❑ Indoor and Outdoor LED Video Displays ❑ Variable Message Sign (VMS) ❑ Dot Matrix Module ❑ LCD Display Backlighting Typical Operating Circuits Features ✦ 3.3V ~ 5V Operating supply voltage ✦ 3~70m A/5V Constant current output range ✦ 3~50m A/3.3V Constant current output range ✦ 17V Rated output channels for long LED strings ✦ ±1.5% (typ.) LED Current accuracy between channels ✦ ±3% (typ.) LED Current accuracy between chips ✦ ±0.1% Output current regulation capability ✦ Build-in 4K bits SRAM ✦ For dynamic 1/2, 1/4,...