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AN4638 Datasheet(PDF) 2 Page - STMicroelectronics

Part # AN4638
Description  The two-switch forward converter
Download  23 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4638 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
AN4638
2/23
DocID027309 Rev 1
Contents
1
Two-switch forward converter general concepts . . . . . . . . . . . . . . . . . . 3
2
STMicroelectronics V and HB series IGBTs . . . . . . . . . . . . . . . . . . . . . . 5
3
Electrical specifications of welding machines . . . . . . . . . . . . . . . . . . . . 6
4
Description of test conditions and analyses . . . . . . . . . . . . . . . . . . . . . 7
5
V series IGBTs on a 4 kW welder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1
Overview of thermal and electrical measurements . . . . . . . . . . . . . . . . . . 9
6
HB series IGBTs on a 6 kW welder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1
Overview of thermal and electrical measurements . . . . . . . . . . . . . . . . . 13
7
Electrical analysis and waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Appendix A
Topology equations and device selection. . . . . . . . . . . . . . . . . . . . 20
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22


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