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AtmelMSL4164LED电视机直接背光解决方案

发布时间:2020-07-01 01:22:59 阅读: 来源:砂浆泵厂家

LED驱动器.MSL4164具有20MHz SPI总线,每串LED的电流为100mA,电流精度和匹配度优于3%,可驱动16x10个白光LED,16个器件级联可驱动高达2560个白光LED.而MSL4163提供1MHz I2C串口.器件包括先进的PWM引擎,以及片上EEPROM等,主要用在电视和台式电脑监视器,医疗和工业仪表,汽车音/视频显示器.本文介绍了MSL4163/MSL4164主要特性,方框图和典型应用电路,级联连接电路.The Atmel mSilica MSL4164 compact, high-power LED string driver uses internal current control MOSFETs to sink up to 100mA per string, with current accuracy and matching better than 3%. The MSL4164 drive 16 parallel strings of 10 white LEDs each, for a total of 160 white LEDs per device. Sixteen interconnected devices control up to 2560 white e MSL4164 features a 20MHz SPI bus, and the MSL4163 offers a 1MHz 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 EEPROM allows the power-up defaults to be customized through the serial e MSL4163/4 adaptively control 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.A unique combination of peak current controls and pulse width management offer simple, full- screen brightness control, versatile area dimming, and a consistent white point. One external resistor sets 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 e MSL4163/4 feature fault monitoring of open circuit, short circuit, loss of video sync, and over-temperature conditions, and provide a fault output to notify the system controller. Detailed fault status and control are available through the serial e MSL4163/4 are offered in 6 x 6 x 0.75mm, 40-pin TQFN packages and operate over a -40℃ to 85℃ temperature L4163/MSL4164主要特性:? 12-bit PWM String Dimming Operates at 240Hz? Fast Serial Interfaces Support up to 16 Devices per Bus:- MSL4164: 20MHz SPI- MSL4163: 1MHz I2C? 8-bit Adaptive Power Correction Maximizes Efficiency of up to Three String Power Supplies? Drives 16 Parallel LED Strings of 10 White LEDs Each, for up to 2560 White LEDs per Serial Bus? Supports Adaptive, Real-time Area Dimming for Highest Dynamic Range LCD TVs and Monitors? Programmable String Phase Reduces Motion Blur? Global Intensity Control via Serial Interface? 100mA Peak, 60mA Average LED String Current? Single Resistor Sets Peak Current for all LED Strings? ±3% Current Accuracy and Current Balance? Video Frame (Vsync) and Line (Hsync) Sync Inputs? Sync Loss Detectors Optionally Disable LED Strings? Multiple MSL4163/4s Share String Power Supplies and Automatically Negotiate the Optimum Supply Voltage? EEPROM Allows Customized Power-on Defaults? Less than 1μa LED String-off Leakage Current? String Open Circuit and LED Short Circuit Detection with Adjustable Short Circuit Threshold? Individual Fault Detection Enable for Each String? Over-temperature Shutoff Protection? -40℃ To +85℃ Operating Temperature Range? 4kv HBM ESD Rated String Drive OutputsMSL4163/MSL4164应用:Long Life, Efficient LED Backlighting for:? Televisions and Desktop Monitors? Medical and Industrial Instrumentation? Automotive Audio-visual Displays图L4163/MSL4164方框图图L4163/MSL4164应用电路图L4164驱动16串160个白光LED(每串60mA)应用电路

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