MY-Semi Inc.
MY-Semi. was founded on May, 2009 in Hsinchu, Taiwan, and positions itself as a mixed-signal LED driver IC design house that specializes on optoelectronic applications and power management.
MY-Semi. highly values 'innovation'. Top quality is the sum of effort, expertise and experience. MY-Semi’s pioneering lighting solutions demonstrate what we are capable of: creativity, flexibility and versatility.
Innovation certainly is the key to find a 'better' solution. Innovation also secures MY-Semi. 's position among the fab-less IC companies.
Through the continuous innovations and the professional team support, MY-Semi. provides not only quality products but also quality services to meet customers' expectations.
Products and Services
Audio/Visual, Electrical and Signage > Electrical/Electronic > Components > MY9268 16-Channel Constant Current LED Driver With 16bits Multiplex-PDM Control for Dynamic Scanning System
The MY9268, 16-channel constant current LED driver with 16bits grayscale MPDM (Multiplex Pulse Density Modulation) control, supports static and dynamic 1/2, 1/4, 1/8 scanning applications. The distinctive MPDM 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 8bits 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 clock is 8MHz.
Audio/Visual, Electrical and Signage > Electrical/Electronic > Components > MY9262 16-Channel LED Driver With 16bits grayscale Adaptive Pulse Density Modulation & Power Saving Control
The MY9262, 16-channel constant current LED driver with 16bits grayscale Adaptive Pulse Density Modulation (APDM) and power saving control, supports high quality LED video display applications. This distinctive APDM technology abates the non-ideal IOUT distortion due to non-symmetric transient responses and enhances the refresh rate by separating efficiently the frame waveform.
The MY9262 features a fast 30MHz DCK input, allowing a wide LED dimming (on/off) range to be implemented. This 4-wire serial interface allows a microcontroller to configure the output channels using four inputs (DI, DCK, LAT, and GCK) and a data output (DO). DO allows multiple drivers to be cascaded and operated together.
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 17V and delivers up to 45mA 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 global current control. Furthermore, the MY9262 also supports the grayscale synchronization by two functions of counter reset and data synchronization. And the sleep mode could efficiently lower down the supply current in power saving applications.
The MY9262 is available in a 24-pin SOP/SSOP/TSSOP/ QFN package and specified over the -40°C to +85°C ambient temperature range.
Audio/Visual, Electrical and Signage > Electrical/Electronic > Components > MY9221 12-Channel LED Driver With Grayscale Adaptive Pulse Density Modulation Control
The MY9221, 12-channels (R/G/B x 4) constant current APDM (Adaptive Pulse Density Modulation) LED driver, operates over a 3V ~ 5.5V input voltage range. The device provides 12 open-drain constant current sinking outputs that are rated to 17V 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 10MHz EMI reduction 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.
Audio/Visual, Electrical and Signage > Electrical/Electronic > Components > MY9231 3-Channel LED Driver With Grayscale Adaptive Pulse Density Modulation Control
The MY9231, 3-channel (R/G/B x 1) constant current APDM (Adaptive Pulse Density Modulation) LED driver, operates over a 3V ~ 5.5V input voltage range. The device provides 3 open-drain constant current sinking outputs that are rated to 17V and delivers up to 350mA of high accuracy current to each string of LED. The current at each output is programmable by means of three external current setting resistors.
MY9231 features a 10MHz EMI reduction data clock input. MY9231 also offers a 2-wire serial interface to send the grayscale data, control command including 16/14/12/8-bit grayscale selection, output polarity selection for high power LED driving grayscale clock frequency division selection, output Tr/Tf timing selection, current output waveform selection, and to realize the internal-latch function. MY9231 provides adaptive pulse density modulation method to increase the visual refresh rate up to 2000 Hz @ 16-bit grayscale and reduce the flickers, and it also provides output polarity selection for high power LED driving. Moreover MY9231 utilizes clock duty recovery technique and pulse re-timing to help long distance and multiple cascading applications. MY9231 provides typical ±1.5% channel-to-channel LED current accuracy. Additional features include a ±0.1% regulated output current capability and fast output transient response.
MY9231 is available in QFN16?SSOP16 and TSSOP16(Exposed Pad) packages and specified over the -40°C to +85°C ambient temperature range.
Audio/Visual, Electrical and Signage > Electrical/Electronic > Components > MY9291 4-Channel LED Driver With Grayscale Adaptive Pulse Density Modulation Control
The MY9291, 4 or 3-channel (R/G/B/W or R/G/B/Amber or R/G/B x 1) constant current APDM LED driver, operates over a 3V ~ 5.5V input voltage range. The device provides 4 or 3(selectable) open-drain constant current sinking outputs that are rated to 17V and delivers up to 350mA of high accuracy current to each string of LED. The current at each output is programmable by means of four external current setting resistors.
MY9291 features a 10MHz EMI reduction data clock input. MY9291 also offers a 2-wire serial interface to send the grayscale data, control command including 16/14/12/8-bit grayscale selection, output polarity selection for high power LED driving grayscale clock frequency division selection, output Tr/Tf timing selection, current output waveform selection, and to realize the internal-latch function. MY9291 provides adaptive pulse density modulation method to increase the visual refresh rate up to 2000 Hz @ 16-bit grayscale and reduce the flickers, and it also provides output polarity selection for high power LED driving. Moreover MY9291 utilizes clock duty recovery technique and pulse re-timing to help long distance and multiple cascading applications. MY9291 provides typical ±1.5% channel-to-channel LED current accuracy. Additional features include a ±0.1% regulated output current capability and fast output transient response.
MY9291 is available in a QFN20,SSOP20 and TSSOP20(Exposed Pad) packages and specified over the -40°C to +85°C ambient temperature range.
Audio/Visual, Electrical and Signage > Electrical/Electronic > Components > MY9941 4 Channels Constant Current LED Driver With Cascade DMX512 Protocol and Differential Interface
The MY9941, 4 channels constant current LED driver with 14bits grayscale APDM (Adaptive Pulse Density Modulation) control, supports standard/4x DMX512 protocol and fully differential interface suited for long distance cascade applications. The distinctive DMX512 decoding approach could decode precisely a standard DMX512 signal. And each device loads one/two/three/four grayscale data according to two slot selection pins. The differential interface provides wide common-mode range to support long distance transmission without common-ground power systems.
The device operates over 7V to 40V input voltage range and provides 4 open-drain constant current sinking outputs that are rated to 40V and delivers up to 350mA of high accuracy current to each string of LED. The current at each output is programmable by means of four external current setting resistors. The MY9941 provides the gamma correction, gamma value is 2.2, to transform 8bits DMX data to 14bits APDM data in order to enhance brightness contract. The 14bits adaptive pulse density modulation makes sure that the frame refresh rate is higher than 2KHz. And an accurate oscillator is built in for free running APDM grayscale control and DMX512 decoder.
Furthermore, MY9941 also supports 4X DMX512 interface to enhance data refresh rate by four times. MY9941 could drive High Power LED directly by shorting the output channels and changing the slot data number. The POL function makes MY9941 as a PWM generator to support driving high power LEDs. MY9941 is available in SSOP24/TSSOP20 packages and specified over the -40°C to +85°C ambient temperature range.
Audio/Visual, Electrical and Signage > Electrical/Electronic > Components > MY9942 4 Channels Constant Current LED Driver With Addressable DMX512 Protocol and Differential Interface
The MY9942, 4 channels constant current LED driver with 14bits grayscale APDM (Adaptive Pulse Density Modulation) control, supports standard / 4X DMX512 protocol and fully differential interface suited for long distance parallel applications. The distinctive DMX512 decoding approach could decode precisely a standard DMX512 signal. And each device loads one/two/three/four grayscale data according to two slot selection pins and nine address setting pins (512 addresses). The differential interface provides wide common-mode range to support long distance transmission without common-ground power systems.
The device operates over 7V to 40V input voltage range and provides 4 open-drain constant current sinking outputs that are rated to 40V and delivers up to 350mA of high accuracy current to each string of LED. The current at each output is programmable by means of four external current setting resistors. The MY9942 provides the gamma correction, gamma value is 2.2, to transform 8bits DMX data to 14bits APDM data in order to enhance brightness contract. The 14bits adaptive pulse density modulation makes sure that the frame refresh rate is higher than 2KHz. And an accurate oscillator is built in for free running APDM grayscale control and DMX512 decoder.
Furthermore, MY9942 could drive High Power LED directly by shorting the output channels and changing the slot data number. The POL function makes MY9942 as a PWM generator to support driving high power LEDs. MY9942 is available in 28-pin SSOP/TSSOP packages and specified over the -40°C to +85°C ambient temperature range.
 |
| Additional Information |
| Date Established: |
May, 2012 |
|
