適用于AVR放大器的低電源應(yīng)用指南

　　本用戶指南文件是低調(diào)的電源，適用于AVR放大器或其他高功率放大器應(yīng)用。電源交流輸入電壓接受（108 Vrms的265VRMS），并產(chǎn)生一個(gè)輸出電壓50-vdc負(fù)載高達(dá)12個(gè)（600 W）。

　　介紹

　　電源是專(zhuān)門(mén)為音頻應(yīng)用和更具體的tas5630 / tas5631來(lái)自德克薩斯儀器。與工業(yè)級(jí)電源的區(qū)別是典型的用戶模式音頻系統(tǒng)。首先，音樂(lè)是動(dòng)態(tài)的波峰因子通常在1 / 10至1 / 5的范圍內(nèi)（高度壓縮音樂(lè)）。第二，用戶模式的一個(gè)正常的音頻系統(tǒng)，運(yùn)行的大部分時(shí)間在低功率模式（小于5W）播放“背景”音樂(lè)。

　　該信息已為tas5630 SMPS設(shè)計(jì)時(shí)考慮。提供的功能和功能的解釋。提供指示正常的程序，對(duì)于電源的設(shè)計(jì)已被修改，以適應(yīng)音頻應(yīng)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.