161:Зависимости тока от напряжения для полевого МОП-транзистора, работающего в омической области, и диода. При малых значениях тока падение напряжения на MOSFET меньше, чем на диоде (из-за его прямого падения напряжения). Когда ток увеличивается, прямое падение напряжения на диоде не увеличивается так быстро, как на MOSFET. Как следствие, для больших токов потери (ток, умноженный на напряжение) в диоде меньше, чем в MOSFET. Однако, подключив несколько полевых МОП-транзисторов параллельно, можно уменьшить их сопротивление во включённом состоянии, как показано на рисунке (пурпурная кривая). Параллельное соединение нескольких диодов не изменит их пороговое напряжение и выигрыш в рассеиваемой мощности будет незначительным.
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MOSFET. In consequence, for high currents, the losses (current times voltage) are less in the diode than in the MOSFET. However, by connecting several MOSFETs in parallel, it is possible to reduce their RDSon as can be seen in the figure (magenta curve). Paralleling several diodes will not modify their threshold voltage. Created using
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Current vs
Voltage curves of a MOSFET operating in the ohmic region and a diode. At low current values, the voltage drop in the MOSFET is less than in the diode (due to its threshold voltage). When the current increases, the forward voltage drop of the diode does not increase as much as that of the
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330:Gnuplot code
313:text/digits.
246:Russian .svg
234:English .svg
222:English .png
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115:You can help
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22:File history
1415:JoKalliauer
1350:27 May 2011
1262:copyrighted
1168:share alike
1162:attribution
1079:share alike
1073:attribution
968:head_length
587:axis_bottom
321:Source code
210:French .png
191:User:CyrilB
171:27 May 2011
137:Description
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1383:Dimensions
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668:"Voltage "
656:"Current "
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611:axis_right
506:ytics_axis
494:xtics_axis
413:dimensions
362:MOSFET2(x)
27:File usage
1589:Rectifier
1450:valid svg
1380:Thumbnail
1377:Date/Time
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1016:Licensing
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599:axis_left
446:font_size
401:file_name
350:MOSFET(x)
323:InfoField
256:InfoField
158:Русский:
146:English:
1665:Metadata
1205:Captions
1151:to remix
1145:to share
1136:license.
1062:to remix
1056:to share
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938:nofilled
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