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MY9221

MY-Semi
Part Number MY9221
Manufacturer MY-Semi
Description 12-channel (Support R / G / B x 4) Constant Current LED Driver
Published Feb 28, 2015
Detailed Description MY-Semi MY9221 12-Channel LED Driver With Grayscale Adaptive Pulse Density Modulation Control General Description The ...
Datasheet PDF File MY9221 PDF File

MY9221
MY9221

Overview
MY-Semi MY9221 12-Channel LED Driver With Grayscale Adaptive Pulse Density Modulation Control General Description The MY9221, 12-channels (R/G/B x 4) c o n s t a n t current APDM (Adaptive Pulse Density M o d u l a t i o n ) LED driver, operates over a 3V ~ 5.
5V input voltage range.
The device provides 1 2 open-drain constant current sinking outputs that are rated to 1 7 V and delivers up to 60mA of high accuracy current to each string of LED.
The current at each output is programmable by means of three external current setting resistors.
MY9221 features a 1 0 M H z E M I r e d u c t i o n data clock input.
MY9221 also offers a 2-wire serial interface to send the grayscale data, control command including 16/14/12/8-bit grayscale selection, grayscale clock frequency division selection, output polarity selection for high power LED driving, output Tr/Tf timing selection, current output waveform selection, and to realize the internal-latch function.
MY9221 provides adaptive pulse density modulation method to increase the visual refresh rate up to 1000 Hz @ 16-bit grayscale and reduce the flickers, and it also provides output current bilateral processing for EMI reduction.
Moreover MY9221 utilizes clock duty recovery technique and pulse re-timing to help long distance and multiple cascading applications.
MY9221 provides typical ±1% channel-to-channel LED current accuracy.
Additional features include a ±0.
1% regulated output current capability and fast output transient response.
MY9221 is available in a 20-pin QFN or 24-pin SSOP/TSSOP package and specified over the -40°C to +85°C ambient temperature range.
Applications ❑ Indoor and Outdoor LED Video Displays ❑ Full Color Mesh Display ❑ Full Color Dot Matrix Module ❑ Architectural and Decorative Lighting ❑ LCD Display Backlighting Typical Operating Circuits Features ✦ 3 ~ 5.
5V Operating supply voltage ✦ R/G/B x4 Output Channels ✦ 3~60mA@5V Constant current output range ✦ 3~35mA@3.
3V Constant current output range ✦ Curre...


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