适用于AVR放大器的低电源应用指南

　　本用户指南文件是低调的电源，适用于AVR放大器或其他高功率放大器应用。电源交流输入电压接受（108 Vrms的265VRMS），并产生一个输出电压50-vdc负载高达12个（600 W）。

　　介绍

　　电源是专门为音频应用和更具体的tas5630 / tas5631来自德克萨斯仪器。与工业级电源的区别是典型的用户模式音频系统。首先，音乐是动态的波峰因子通常在1 / 10至1 / 5的范围内（高度压缩音乐）。第二，用户模式的一个正常的音频系统，运行的大部分时间在低功率模式（小于5W）播放“背景”音乐。

　　该信息已为tas5630 SMPS设计时考虑。提供的功能和功能的解释。提供指示正常的程序，对于电源的设计已被修改，以适应音频应用中。

　　The requirements for a modern AVR include a slim physical profile and the ability to operate from the acline　input at close to unity power factor. Therefore， an AVR application demands the power supply be of　low height， and comply with the power quality requirements defined in the IEC standard， 61000-3-2. In　addition， the combination of a tight physical package and the desire to meet Energy Star™ guidelines　requires that the design also demonstrates high efficiency. Described herein is a practical design that uses　standard components. It achieves the requirements using a traditional two-stage power converter topology　along with state-of-the-art power circuit control methods. The first stage is an interleaved， transition-mode，　power factor correcting （PFC） boost pre-regulator. This is followed by an isolated LLC series resonant DCDC　main converter.　The design takes advantage of three integrated circuit power controllers.

　　• The PFC pre-regulator stage is controlled by the UCC28061， a dual-phase， interleaved， transitionmode　PFC controller.

　　• The resonant LLC converter uses the UCC25600; a low-cost 8-pin controller.

　　• The third IC is the UCC28600. This is used to control a small 6-W flyback converter that provides a　bias supply voltage.