應用於整合式個人電腦之高效率切換式電源供應器研製

Design and Implementation of a High-Efficiency Switching Power Supply for All-in-One (AIO) Type PC

黃兆億(Chao-Yi Huang)

指導教授 ： 歐勝源

國立臺北科技大學/電資學院/電機工程系研究所/碩士(2013年)

https://doi.org/10.6841/NTUT.2013.00071

摘要

本篇論文主要設計與研製應用於整合式個人電腦之薄型化高效率230瓦的電源供應器，其效率須符合80 Plus白金牌規範，輕載能效達到2013 EuP Lot 6規範。
功率因數修正器採用電壓隨耦法控制模式，利用電感電流操作在邊界模式下，具有零電流切換特性，有效降低功率因數修正器的切換損失。直流轉換器部分採用半橋式串聯諧振轉換器，其具有零電壓切換特性，也可有效降低直流轉換器的切換損失。諧振電感採用分離式繞組，讓主感量與諧振感量能自由調整來達到效率最佳化。二次側採用同步整流方式，利用功率晶體取代二極體，藉以降低導通損失。
控制IC採用恩智浦(NXP Semiconductors)的TEA1716T，其將功率因數修正器以及半橋式串聯諧振轉換器的控制訊號整合在一起，可將周邊線路精簡化，達到零件數目最佳化之目的。另外，在極輕載模式下，內建的突發模式(Burst Mode)功能，可提升極輕載下的轉換效率。
最後實際研製一可應用於整合式個人電腦之高效率電源供應器，並量測效率及相關波形，結果證明可符合80 Plus白金牌及2013 EuP Lot 6的輕載能效要求。

關鍵字

整合式個人電腦 ； 80 Plus ； EuP Lot 6 ； 高效率 ； 功率因數修正器 ； 半橋式串聯諧振轉換器 ； LLC ； 零電壓切換 ； 同步整流

並列摘要

The subject of this thesis is to design and implement a 230-watt slim-type high efficiency power supply of which efficiency can match 80 Plus Platinum standard and meet 2013 EuP Lot 6 requirement at light load.
The implemented power supply in this paper comprises two power stages, one is the power factor corrector (PFC) and the other is the DC-DC converter. PFC uses voltage follower control method and has zero-current switching (ZCS) characteristics as operating in boundary current mode (BCM) that can effectively reduce the switching loss of PFC converter to improve the efficiency. The DC-DC converter is constructed with the half-bridge series resonant converter (SRC) topology which contributes zero-voltage switching (ZVS) characteristics can effectively reduce the switching loss of SRC. The resonant inductor takes in use of separate winding, so the main inductance and resonant inductance can be freely adjusted to get the best efficiency. On secondary side, MOSFETs are used instead of the Schottky diodes to further reduce conduction loss.
The control IC TEA1716T is used in the power supply, made by NXP, which integrates the required functions of PFC controller and the SRC controller in one chip and can get lower component count. In addition, the popular burst mode function to improve efficiency more at very light load is built-in this control IC.
Finally, the practical measurement for efficiency and waveforms of the implemented high-efficiency power supply is performed to verify the theoretical analysis and design, the experimental result shows this power supply can match 80 Plus Platinum standard and meet 2013 EuP Lot 6 requirement.

並列關鍵字

AIO PC ； 80 Plus ； EuP Lot 6 ； High efficiency ； Power factor corrector(PFC) ； LLC ； Zero voltage switching ； Synchronous rectification

參考文獻

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