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Solid-State LED Lighting


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MSL2162

MSL2162 Complete

(文件大小: 2144316, 24 页数, 修订版 A, 更新时间: 06/2011)
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The MSL2162 compact, high-power LED string driver uses external current control MOSFETs to sink up to 350mA per string, with current accuracy and matching better than 1.5%. The MSL2162 drives 16 parallel strings of LEDs and offers fault detection and management of open and short circuit LEDs. The Atmel mSilica MSL2162 features a 20 MHz SPI serial interface that supports video frame-by-frame LED string intensity control for up to eight interconnected devices. Frame-by-frame control allows active area dimming and phase shifted PWM dimming for improved backlight performance, and the advanced PWM engine synchronizes PWM dimming to the video signals for reduced motion blur and waterfall noise.

The MSL2162 adaptively controls the DC-DC converters that power the LED strings, using mSilica's Adaptive SourcePower™ technology. These Efficiency Optimizers minimize power use while maintaining precise LED current accuracy.

A unique combination of peak current control and pulse width dimming management offers simple full screen brightness control, versatile area dimming and a consistent white point. LED string current is set for each string using a current sense resistor, which offers the flexibility to drive each string with a different peak current if desired. LED current is also globally adjustable for all 16 LED strings with 8-bit control. Global string drive pulse width is adjusted with an 8-bit global intensity register, and individual string pulse width is modulated with 12-bit control.

关键参数

参数

Interface Type:

I2C (PWM)

Number of Strings:

16

Max Current per String:

DENR

LEDs per String:

DENR

Max String Match:

1.5%

String Current Global:

8 bits

String Current per String:

R

String PWM Global:

8 bits

String PWM per String:

12 bits

String Phasing:

12 bits