高功率密度超薄開關(guān)電源設(shè)計
2021年電子技術(shù)應(yīng)用第2期
于 廣,李鳳坤,田 華
大連東軟信息學(xué)院 智能與電子工程學(xué)院,遼寧 大連116023
摘要: 平面變壓器具有體積小、漏感低、轉(zhuǎn)換效率高、散熱性能好等優(yōu)勢,平面變壓器設(shè)計方案很適合超薄開關(guān)電源的設(shè)計。以反激變換器為主電路,以SG6742為主控芯片,采用平面變壓器研制了一臺19.8 V/(2.31 A)高功率密度,超薄開關(guān)電源,給出了變壓器的參數(shù)選擇和平面變壓器的PCB設(shè)計。電路測試結(jié)果表明該反激式電源具有88 V~264 V的寬輸入電壓,輸出電壓紋波小,在寬電壓輸入范圍下效率大于87%。
中圖分類號: TN86
文獻標(biāo)識碼: A
DOI:10.16157/j.issn.0258-7998.200863
中文引用格式: 于廣,李鳳坤,田華. 高功率密度超薄開關(guān)電源設(shè)計[J].電子技術(shù)應(yīng)用,2021,47(2):85-88.
英文引用格式: Yu Guang,Li Fengkun,Tian Hua. Design of a high power density ultra-thin switching power supply[J]. Application of Electronic Technique,2021,47(2):85-88.
文獻標(biāo)識碼: A
DOI:10.16157/j.issn.0258-7998.200863
中文引用格式: 于廣,李鳳坤,田華. 高功率密度超薄開關(guān)電源設(shè)計[J].電子技術(shù)應(yīng)用,2021,47(2):85-88.
英文引用格式: Yu Guang,Li Fengkun,Tian Hua. Design of a high power density ultra-thin switching power supply[J]. Application of Electronic Technique,2021,47(2):85-88.
Design of a high power density ultra-thin switching power supply
Yu Guang,Li Fengkun,Tian Hua
School of Intelligence & Electronic Engineering,Dalian Neusoft University of Information,Dalian 116023,China
Abstract: The planar transformer has the advantages of small size, low leakage inductance, low conversion efficiency, and good heat dissipation performance. The design scheme of the planar transformer is very suitable for the design of ultra-thin switching power supplies. Small-sized ultra-thin switching power supply with high power density of 19.8 V(2.31 A) is developed using a planar transformer. Flyback converter is used as the main circuit and SG6742 is used as the control chip,parameter selection of transformer and PCB design of planar transformer are given. The circuit test results show that the flyback power supply has a wide input voltage of 88 V~264 V, the output voltage ripple is small, and the efficiency is greater than 87% under a wide voltage input range.
Key words : switching power supply;flyback converter;planar transformer;high power density
0 引言
隨著電子儀器設(shè)備朝著小型化、高功率密度、高變換效率、高可靠性、綠色化方向發(fā)展,輕、薄、小成為衡量儀器設(shè)備的重要標(biāo)志,故設(shè)計高功率、高性能的開關(guān)電源是電力電子技術(shù)研究的重要內(nèi)容。磁性元件的體積和重量在開關(guān)電源中占據(jù)相當(dāng)大的比例,占總體積和重量的百分之三四十,降低開關(guān)電源中的磁性元件的體積,成為降低開關(guān)電源的體積和重量、提高其功率密度的一種方法[1]。平面變壓器因以PCB Trace代替導(dǎo)線繞組實現(xiàn)變壓器平面結(jié)構(gòu),可有效降低變壓器厚度, 減小開關(guān)電源的體積和重量。
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作者信息:
于 廣,李鳳坤,田 華
(大連東軟信息學(xué)院 智能與電子工程學(xué)院,遼寧 大連116023)
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