دانلود مقاله ISI یک IC درایوکننده رشته ای موازی SIMO برای نور پس زمینه LED با نور قابل کنترل

عنوان انگلیسی مقاله:
A SIMO Parallel-String Driver IC for Dimmable LED Backlighting With Local Bus Voltage Optimization and Single Time-Shared Regulation Loop

ترجمه فارسی عنوان مقاله:
یک IC درایوکننده رشته ای موازیSIMO  برای نور پس زمینه LED  با نور قابل کنترل بهمراه بهینهسازی ولتاژ باس محلی و حلقه تنظیم زمان-سهیمشده تنها

چکیده انگلیسی مقاله:
Traditional LED drivers with multiple converters for powering up multiple strings in parallel suffer from high system volume and cost. The reported literature with single converter and dynamic bus voltage offers compact designs. However, the performance on power consumption is degraded. Meanwhile, all the aforementioned approaches require multiple current regulation elements, which in?ict current balance errors due to mismatches. A compact single-inductor multiple-output parallel-string LED driver with time-multiplexing control is, thus, proposed. It can independently optimize local bus voltages for power loss reduction. In addition, a single time-shared control loop is proposed for current regulation in multiple parallel strings, resulting in a dramatic reduction of current balance errors. A 0.35 μmCMOSprototype achieves 2.8 times loss reduction over the reported literature, with a current balance error well controlled below 1.7%. The control scheme also offers ?exible dimming for advanced backlight ng operations.

منتشر کننده مقاله: IEEE

سال انتشار مقاله: 2012
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فرمت: pdf
تعداد صفحات/اسلاید: 11