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EPR-21 参数 Datasheet PDF下载

EPR-21图片预览
型号: EPR-21
PDF下载: 下载PDF文件 查看货源
内容描述: 工程原型报告( EP - 21 ) - 30W的DC- DC转换器, DPA424 [Engineering Prototype Report (EP-21) - 30 W DC-DC Converter with DPA424]
分类和应用: 转换器
文件页数/大小: 32 页 / 1244 K
品牌: POWERINT [ Power Integrations ]
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EPR-21 – 5 V, 30 W DC-DC Converter  
19-Nov-02  
Table Of Contents  
1
2
3
4
Introduction.................................................................................................................3  
Power Supply Specification ........................................................................................4  
Schematic...................................................................................................................5  
Circuit Description.......................................................................................................6  
4.1 Primary Circuitry......................................................................................................6  
4.2 Output Rectification.................................................................................................6  
4.3 Output Feedback.....................................................................................................7  
4.4 Construction............................................................................................................7  
PCB Layout.................................................................................................................8  
Bill Of Materials...........................................................................................................9  
5
6
Transformer Specification................................................................................................10  
7.1 Electrical Specifications.........................................................................................10  
7.2 Materials................................................................................................................10  
7.3 Transformer Build Diagram ...................................................................................11  
7.4 Transformer Construction......................................................................................11  
8
Inductor Specification................................................................................................12  
8.1 Electrical Specifications.........................................................................................12  
8.2 Materials................................................................................................................12  
8.3 Inductor Build Diagram..........................................................................................13  
8.4 Inductor Construction............................................................................................13  
PIXls Design Spreadsheet........................................................................................14  
9
10 Performance Data.....................................................................................................17  
10.1 Efficiency ...........................................................................................................17  
10.2 Regulation .........................................................................................................18  
10.2.1 Load Regulation.............................................................................................18  
10.2.2 Line Regulation..............................................................................................18  
11 Thermal Performance...............................................................................................19  
12 Waveforms................................................................................................................21  
12.1 Drain Voltage and Current, Normal Operation...................................................21  
12.2 Output Voltage Start-up Profile..........................................................................22  
12.3 Load Transient Response (75% to 100% Load Step)........................................23  
12.4 Output Ripple Measurements............................................................................24  
12.4.1 Ripple Measurement Technique ....................................................................24  
12.4.2 Measurement Results ....................................................................................25  
13 Control Loop Measurements.....................................................................................26  
13.1 Maximum Load 36 VDC.....................................................................................26  
13.2 Maximum Load 48 VDC.....................................................................................26  
13.3 Maximum Load 72 VDC.....................................................................................27  
14 Revision History........................................................................................................28  
Important Note:  
Although the EP-21 is designed to satisfy telecom safety isolation requirements, this  
engineering prototype has not been agency approved.  
Power Integrations, Inc.  
Tel: +1 408 414 9660 Fax: +1 408 414 9760  
Page 2 of 32  
www.powerint.com