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LED Display


MY9266

16-Channel Constant Current LED Driver With 16bits MPDM Control for Dynamic Scanning Systems
General Description

*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

/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 

     9266 Operating circuits.JPG

Features
  • 3.0V ~ 5.5V Operating supply voltage
  • 3~55mA/5V Constant current output range
  • 3~35mA/3.3V Constant current output range
  • 16V Rated output channels for long LED strings
  • ±3.0% (max.) LED Current accuracy between channels
  • ±3.0% (max.) LED Current accuracy between chips
  • ±0.1% Output current regulation capability
  • Built-in 8K bits SRAM
  • For any dynamic systems from 1/2 scan to 1/16 scan 
  • 16bits grayscale resolution with Multiplex Pulse Density Modulation  [ patent pending ]
  • Support diverse applications of 8bits~16bits grayscale resolution 
  • Refresh rate up to 4000Hz in 1/16 scanning systems and 8000Hz in 1/8 scanning systems    
  • EMI reduction grayscale clock
  • Automatic black frame insertion
  • Ghost image abatement
  • 6bits linear global current control 
  • 30MHz Clock frequency for data transfer
  • 30ns fast current transient response
  • Current setting by one external resistor
  • Schmitt trigger input
  • Power on reset
  • -40°C to +85°C Ambient temperature range
Order Information
PART PACKAGE INFORMATION
MY9266SA SOP24-236mil-1.0mm 2000 pcs/Reel
MY9266SS SSOP24-150mil-0.635mm 2500 pcs/Reel
MY9266TE TSSOP24-173mil-0.65mm 2500 pcs/Reel
MY9266QF QFN24-4mmx4mm-0.5mm 3000 pcs/Reel

 

Pin Configuration

       9266 Pin Configuration.JPG

 

 


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