| 基于高清LED背光芯片SY7732的应用系统设计 |
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| 引用本文： | 林建宇.基于高清LED背光芯片SY7732的应用系统设计[J].上海电力学院学报,2019,35(6):602-606. |
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| 作者姓名： | 林建宇 |
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| 作者单位： | 上海电力学院 电子与信息工程学院 |
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| 摘 要： | 采用Silergy公司的高清背光LED芯片SY7732和同步降压芯片SY8205,设计了一个应用系统。芯片SY7732负责驱动和控制16路背光LED负载,对每一路输出进行脉冲宽度调制比调光;同时,控制SY8205降压电路单元,将输入电压调整至LED背光负载的理想工作电压。使用SPI通信协议总线传输命令数据至SY7732内部寄存器,实现SY7732的功能。打样焊接后对外围电路进行搭建,完成调光线性度、背光效率和电流匹配性的测试。测试结果显示,该应用系统性能良好。
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| 关 键 词： | SY7732背光LED芯片 调光线性度 效率 电流匹配性 |
| 收稿时间： | 2018/7/3 0:00:00 |
Design of High-definition System Based on SY7732 LED Backlight Chips |
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| LIN Jianyu.Design of High-definition System Based on SY7732 LED Backlight Chips[J].Journal of Shanghai University of Electric Power,2019,35(6):602-606. |
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| Authors: | LIN Jianyu |
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| Affiliation: | School of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai 200090, China |
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| Abstract: | Based on Silergy''s high-definition backlight LED chip SY7732 and synchronous buck chip SY8205.SY7732 is applied to drive and control 16 LED loads that is performing pulse width modulation index dimming on each output.At the same time,SY8205 buck chip is controlled to adjust the input voltage to the nominal voltage of LED backlight load.SPI protocol bus transfers command data is used in SY7732 internal registers to realize the function of SY7732.The system is designed to complete the current sink linearity,efficiency and current matching test. |
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| Keywords: | SY7732 LED backlight chips current sink linearity efficiency current matching accuracy |
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