16-string White & RGB LED Drivers - ATMEL Corporation
Description
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Atmel LED Drivers MSL3163 and MSL3164
16-string White & RGB LED Drivers with Adaptive Power Control, E²PROM, and SPI/I²C/SMBus Serial Interface
Datasheet Brief
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Atmel LED Drivers-MSL3163 and MSL3164
16-string White & RGB LED Drivers with Adaptive Power Control, E²PROM, and SPI/I²C/SMBus Serial Interface
General Description
The Atmel LED DriversMSL3163 and MSL3164 compact, high-power LED string drivers use internal current control MOSFETs to sink up to 100mA per string, with current accuracy and matching better than 3%.
The MSL3163/4 drive 16 parallel strings of ten white LEDs each, for a total of 160 white LEDs per device.
Sixteen interconnected devices control up to 2560 white LEDs.
The MSL3163/4 adaptively controls the DC-DC converters that power the LED strings, using Atmel's Adaptive SourcePower technology.
These Efficiency Optimizers minimize power use while maintaining LED current accuracy.
The MSL3164 features a 20 MHz SPI serial interface, and the MSL3163 offers a 1 MHz I2C serial interface.
Both interfaces support video frame-by-frame LED string intensity control for up to 16 interconnected devices to allow active area dimming.
The devices include an advanced PWM engine that easily synchronizes to a video signal, and per-string phase adjustment to reduce unwanted LCD artifacts such as motion blur.
Additionally, an on-chip E²PROM allows the power-up defaults to be customized through the serial interface.
A unique combination of peak current control and pulse width management offer simple full screen brightness control, versatile area dimming and a consistent white point.
One external resistor provides the global peak reference current for all LED strings, and global peak current fine-tuning is available through an 8-bit register.
Global string drive pulse width is adjusted with an 8-bit global intensity register, and individual string pulse width is modulated with 12-bit...
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