Mosfet 基础 Mosfet 基础
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2009-05-15
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Rev D, July 2000
July, 2000
1
AN9010
MOSFET Basics
By K.S.Oh
CONTENTS
1. History of Power MOSFETs........................................................................................................ 2
2. FETs ........................................................................................................................................... 3
1) JFET....................................................................................................................................... 3
2) MOSFET ................................................................................................................................ 4
3. The structure of MOSFET .......................................................................................................... 5
1) Lateral Channel Structure ..................................................................................................... 5
2) Vertical Channel Structure ..................................................................................................... 5
4. The characteristics of MOSFET .................................................................................................7
1) Advantages ............................................................................................................................ 7
2) Disadvantage ......................................................................................................................... 7
3) Basic Characteristics.............................................................................................................. 7
5. Characteristics of MOSFET’s ON, OFF.................................................................................... 10
1) Off State ............................................................................................................................... 10
2) Turn – on Transient ...............................................................................................................11
3) On State............................................................................................................................... 13
4) Turn – off Transient .............................................................................................................. 14
6. User’s Manual .......................................................................................................................... 14
1) Characteristics of Capacitance ............................................................................................ 14
2) Characteristics of the Gate Charge...................................................................................... 17
3) Drain – source On Resistance ............................................................................................. 20
4) Threshold Voltage ................................................................................................................ 22
5) Transconductance................................................................................................................ 22
6) Drain – source Breakdown Voltage
Breakdown Voltage Temp. Coeff. ......................................................................................... 23
7) Drain – to – source Leakage Current ................................................................................... 24
8) Gate – to – source Voltage...................................................................................................24
9) Gate – source Leakage, Forward / Reverse ........................................................................ 24
10) Switching Characteristics ...................................................................................................24
11) Single – pulsed Avalanche Energy..................................................................................... 25
12) Repetitive Avalanche Rating .............................................................................................. 27
13) Drain – to – source dv / dt Ratings..................................................................................... 27
14) Thermal Characteristics .....................................................................................................32
15) Continuous Drain Current, Drain Current – pulsed ............................................................ 35
16) Total Power Dissipation, Linear Derating Factor ................................................................ 35
17) Safe Operating Areas......................................................................................................... 36
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