A Product Line of
Diodes Incorporated
DMC3028LSD
Q1 N-Channel continued
700
10
600
500
V GS = 0V
f = 1MHz
9
8
7
I D = 6A
400
300
C OSS
C ISS
6
5
4
200
100
C RSS
3
2
1
V DS = 15V
0
1 10
V DS - Drain - Source Voltage (V)
0
0
1
2
3 4 5 6 7
Q - Charge (nC)
8
9
10 11
Capacitance v Drain-Source Voltage
Gate-Source Voltage v Gate Charge
Test Circuits – Q1 N-Channel
Current
Q G
regulator
12V
5 0k
Same as
D.U.T
V G
Q GS
Q GD
Charge
I G
V GS
D.U.T
V DS
I D
V DS
Basic gate charge waveform
Gate charge test circuit
90%
10%
V GS
R G
V GS
R D
V DS
V DD
t d(on)
t (on)
t r
t d(off)
t (on)
t r
Switching time waveforms
Switching time test circuit
DMC3028LSD
Document Revision: 4
6 of 11
www.diodes.com
July 2009
? Diodes Incorporated
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