UA78S40(2006) Просмотр технического описания (PDF) - ON Semiconductor
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Компоненты Описание
производитель
UA78S40 Datasheet PDF : 7 Pages
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Vin
25V
+
100
UA78S40
RSC
0.33
CT
470
pF
9
10
11
12
13
14
15
16
VCC
CT
Ipk
Oscillator
SQ
1.25V
Reference
−
Comp.
+
− Op
+Amp
R
170
D1
8
R2
3.6k
R1 1.2k
7
6
5
4
3
2
*Use external rectifier to increase circuit efficiency
Figure 6. Step−Down Converter
1
1N5822
*
L
Vout
220mH
5.0V/500mA
+
470 CO
Vin
12V
+
100
L
RSC
0.22
CT
1500
pF
170mH
180
9
10
11
12
13
14
15
16
VCC
CT
Ipk
Oscillator
SQ
1.25V
Reference
−
Comp.
+
− Op
+Amp
R
170
D1
8
R2
47k
R1 22k
7
6
5
4
3
2
*Use external rectifier to increase circuit efficiency
Figure 7. Step−Up Converter
1
1N5822
*
150
Vout
28V/175mA
+
CO
http://onsemi.com
5
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