MY9269
16-Channel High Accuracy Constant Current LED Driver
With 16bits Multiplex-PDM Control for Dynamic Scanning Systems
MY-Semi
General Description
Features
✦ 3.0V ~ 5.5V Operating supply voltage
The MY9269, 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 1/8 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 1 6 V 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 8000Hz in dynamic 1/8
scanning systems and 16000Hz in dynamic 1/4
scanning systems when the grayscale resolution is
16bits and the grayscale clock is 10MHz.
✦ 3~55mA/5V Constant current output range
✦ 3~35mA/3.3V Constant current output range
✦ 16V Rated output channels for long LED strings
✦ ±3% (max.) LED Current accuracy between channels
✦ ±3% (max.) LED Current accuracy between chips
✦ ±0.1% Output current regulation capability
✦ Build-in 4K bits SRAM
✦
✦
For any dynamic systems from 1/2 scan to 1/8 scan
16bits grayscale resolution with Multiplex Pulse
[ patent pending ]
[ patent pending ]
Density Modulation [ patent pending ]
✦ Supports diverse applications of 8bits~16bits
grayscale resolution
✦
Refresh rate up to 8000Hz in 1/8 scanning systems
Refresh rate up to 16000Hz in 1/4 scanning systems
EMI reduction grayscale clock
✦
✦
✦
✦
Automatic black frame insertion
Ghost image abatement
6bits linear global current control
The MY9269’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
✦ 30MHz Clock frequency for data transfer
✦ 30ns fast current transient response
✦ Current setting by one external resister
✦ Schmitt trigger input
and 30ns fast output transient response
.
✦ Power on reset
The MY9269 is available in a 24-pin SOP/SSOP/TSSOP
/QFN package and specified over the -40°C to +85°C
ambient temperature range.
✦ -40°C to +85°C Ambient temperature range
Applications
Order information
Part
Package Information
❑ Indoor and Outdoor LED Video Displays
❑ Variable Message Sign (VMS)
MY9269SA
MY9269SS
SOP24-236mil-1.0mm
2000 pcs/Reel
2500 pcs/Reel
SSOP24-150mil-0.635mm
❑ Dot Matrix Module
TSSOP24-173mil-0.65mm
(Exposed Pad)
❑
LCD Display Backlighting
MY9269TE
2500 pcs/Reel
3000 pcs/Reel
MY9269QF QFN24-4mmx4mm-0.5mm
Typical Operating Circuits
Pin Configuration
Nov. 2012 Ver. 0.2
MY-Semi Inc.
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For pricing, delivery, and ordering information, pleases contact MY-Semi Inc. at +886-3-560-1668,
or email to INFO@MY-Semi.com.tw or visit MY-Semi’s website at www.MY-Semi.com.tw
