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产品概述
The Atmel mSilica MSL2161 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 MSL2161 drive 16 parallel strings of LEDs, and offer fault detection and management of open and short circuit LEDs. The MSL2161 features a 1MHz I2C serial interface supporting video frame-by-frame LED string intensity control for up to eight interconnected devices, allowing active area dimming and phase shifted PWM dimming for improved performance. The device include an advanced PWM engine that synchronizes PWM dimming to the video signal for reduced motion blur and waterfall noise. The MSL2161 adaptively controls the DC-DC converters that power the LED strings using mSilica Adaptive SourcePower™ technology. This scheme optimizes power consumption without sacrificing LED current accuracy. Peak LED string currents are set using current sense resistors, and global string current is adjustable 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
| Parameter | Value |
| 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 |
