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一种基于顶部热沉的混合集成电源结构设计
2022年电子技术应用第10期
杨正男1,王 勇2,欧长江1,胡 梅1,张雨萌1
1.中国电子科技集团公司第四十三研究所,安徽 合肥230088; 2.中国电子科技集团公司第四十三研究所 微系统安徽省重点实验室,安徽 合肥230088
摘要: 介绍了一种基于顶部热沉的混合集成电源结构设计,该电源结构的载体为ALN陶瓷基板,内部采用多层布线结构,功率芯片植球后倒扣焊到陶瓷基板的焊盘上,无源器件采用高温焊料焊接在陶瓷基板焊盘上,顶部的热沉通过有机胶与陶瓷基板的边缘粘接,热沉和芯片背面、电感顶部之间采用导热胶填充,以提高芯片和电感的散热效果。该结构在抗辐射负载点电源中应用,验证了该方案的可行性。
中圖分類號(hào): TM46
文獻(xiàn)標(biāo)識(shí)碼: A
DOI:10.16157/j.issn.0258-7998.222836
中文引用格式: 楊正男,王勇,歐長(zhǎng)江,等. 一種基于頂部熱沉的混合集成電源結(jié)構(gòu)設(shè)計(jì)[J].電子技術(shù)應(yīng)用,2022,48(10):40-42.
英文引用格式: Yang Zhengnan,Wang Yong,Ou Changjiang,et al. The design of hybrid integrated power supply structure based on the top heat sink[J]. Application of Electronic Technique,2022,48(10):40-42.
The design of hybrid integrated power supply structure based on the top heat sink
Yang Zhengnan1,Wang Yong2,Ou Changjiang1,Hu Mei1,Zhang Yumeng1
1.The 43rd Research Institute of CETC,Hefei 230088,China; 2.Anhui Province Key Laboratory of Microsystem,the 43rd Research Institute of CETC,Hefei 230088,China
Abstract: This paper introduces a design of hybrid integrated power supply structure based on the top heat sink. The carrier of the power supply structure is ALN ceramic substrate, and a multi-layer wiring structure is used inside. To improve the heat dissipation effect of the chip and the inductor, firstly, the power chip is flip-chip welded to the pad of the ceramic substrate after planting the ball. Secondly, the passive devices are connected to the pad of the ceramic substrate with high-temperature solder and the top heat sink is bonded to the edge of the ceramic substrate through organic glue. Lastly, the gaps between heat sink and back of the chip or top of the inductor are filled with heat conducting-glue. The feasibility of the scheme is verified by the application of the structure in radiation hardened POL power supply.
Key words : top heat sink;ALN ceramic substrate;flip chip;point of load power supply

0 引言

    隨著衛(wèi)星裝備的小型化,整機(jī)系統(tǒng)的輕量化需求日趨明顯,對(duì)空間用抗輻射DC/DC變換器的體積、重量和封裝結(jié)構(gòu)提出了更高的要求[1-3],國(guó)內(nèi)外現(xiàn)有的抗輻射DC/DC變換器多為金屬封裝,體積和重量均已無(wú)法更好滿足對(duì)供電電源的使用需求。為了解決上述問題,本文介紹了一種基于頂部熱沉的混合集成電源結(jié)構(gòu),可將功率器件的熱傳導(dǎo)到頂部熱沉,解決功率器件散熱問題,同時(shí)可為抗輻射混合集成電源尤其是負(fù)載點(diǎn)電源提供一種微型化、輕量化的解決方案。




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作者信息:

楊正男1,王  勇2,歐長(zhǎng)江1,胡  梅1,張雨萌1

(1.中國(guó)電子科技集團(tuán)公司第四十三研究所,安徽 合肥230088;

2.中國(guó)電子科技集團(tuán)公司第四十三研究所 微系統(tǒng)安徽省重點(diǎn)實(shí)驗(yàn)室,安徽 合肥230088)




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