MB3828 查看數據表（PDF） - Fujitsu
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MB3828 Datasheet PDF : 26 Pages
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MB3828
s DC/DC CONVERTER SWITCHING OPERATION WAVEFORMS
<VCC = 5 V, VB = 5 V, Vin = 15V>
VS (V)
20
OUT1 (V) OUT2 (V)
60
30
15
50
25
10
40
20
5
30
15
0
20
10
−5
10
5
0
0
−10
−5
10 V
5V
0
2
VS 5 V
OUT1
OUT2
1 µs
4
6
8
VD4–VD0 = 00101 (1.8 V)
load: 2 A
fosc = 200 kHz setting
10
t (µs)
expansion
VS (V)
1
OUT1 (V) OUT2 (V)
60 30 0.5
50 25
0
40 20 −0.5
30 15 −1
20 10
10 5
00
−10 −5
10 V
5V
500 mV
OUT1
VS
OUT2
100 ns
10 V
500 mV
VS
OUT2
5V
OUT1
100 ns
0
0.2
0.4
0.6
0.8
1.0 0
0.2
0.4
0.6
0.8
1.0
t (µs)
t (µs)
Synchronous rectifier length: 250 ns (typ)
OUT1 tf: 60 ns (typ)
OUT2 tr: 130 ns (typ)
Synchronous rectifier length: 200 ns (typ)
OUT1 tr: 130 ns (typ)
OUT2 tf: 100 ns (typ)
19
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