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 Click picture to enlarge |
General Description:
The MY9168 16-channel constant current LED driver with ghost image abatement i s suitable for multiplexing display system. The device has wide supply vol tage range (3.3V ~ 5.0V) 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. The MY9168 features a fast 30MHz DCK input, allowing a wide LED dimming (on/off) range to be implemented. The MY9168 offers a 4-wire serial interface, a 16-bit shift register, and a 16-bit transparent latch. The serial interface allows a microcontroller to configure the output channels using four inputs (DI, DCK, LAT, and ENB) and a data output (DO). DO allows multiple drivers to be cascaded and operated together.
The MY9168’s on-board pass elements minimize the need for external components, while at the same time, providing ±3%(max.) LED current accuracy. Additional features include a ±0.1% regulated output current capability and fast output transient response. The MY9168 is available in a 24-pin SOP/SSOP/QFN package and specified over the -40°C to +85°C ambient temperature range.
Features:
● 3.3V ~ 5.0V Operating supply voltage (±10%)
● 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.) Current accuracy between channels
● ±3% (max.) Current accuracy between chips
● ±0.1% Output current regulation capability
● 30MHz Clock frequency for data transfer
● Current setting by one external resister
● Schmitt trigger input
● Power on reset
● Stagger output delay
● Fast current transient response
● Ghost image abatement
● Low knee voltage for constant current
● High level HBM ESD protection (Iout pin > 8000V)
● -40°C to +85°C Ambient temperature range
Applications:
● Indoor and Outdoor LED Video Displays
● Variable Message Sign (VMS)
● Dot Matrix Module
● Architectural and Decorative Lighting
● Industrial Lighting
● LCD Display Backlighting
Typical Operating Circuits: (Click picture to enlarge)
 Download detailed specifications
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