16-Channel Constant Current LED Driver With 16bits MPDM Control for Dynamic Scanning Systems
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The MY9266, 16-channel constant current LED driver with 16bits grayscale M-PDM (Multiplex Pulse Density Modulation) control, supports any dynamic applications from 1/2 scan to 1/16 scan. 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 16 open-drain constant current sinking outputs that are rated to 16V and delivers up to 55mA 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 6bits linear global current control. By this advanced M-PDM approach, the frame refresh rate could be improved up to 4000Hz in dynamic 1/16 scanning systems and 8000Hz in dynamic 1/8 scanning systems when the grayscale resolution is 16bits and the grayscale clock is 10MHz.
The MY9266’s on-board pass elements minimize the need for external components, 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 MY9266 is available in a 24-pin SOP/SSOP/TSSOP
|Sales Manager||Josef Röger|