Switch Realization for DC-DC Converters 1. 2 3 4.
39
Switch Realization for DC-DC Converters 1
-
Upload
adam-wilkerson -
Category
Documents
-
view
223 -
download
2
Transcript of Switch Realization for DC-DC Converters 1. 2 3 4.
1
Switch Realization for DC-DC Converters
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
(1) diode off, v(t) negative, i(t) is zero
(2) i(t) increases to positive, charging the junction cap. , diode becomes forward biased.
(3) diode on(4) turn off diode,
but the diode remains on while minority charge present in p-n- junction.
(5) until all minority charges (Qr) emoved, then diode is off, i(t) =0
a peak value due to lightly doped n- region exhibits large resistance
tr reverse recovery time
19
20
21
22
23
24
25
26
MOS from ON to OFF
Diode from OFF to ON
27
28
Transistor from OFF to ON
Diode from ON to OFF
Switching loss
29
30
31
32
33
34
35
36
37
38
Summary
39