78S40 Просмотр технического описания (PDF) - ON Semiconductor
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Компоненты Описание
производитель
78S40 Datasheet PDF : 9 Pages
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Vin
25V
+
100
µA78S40
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
220µH
5.0V/500mA
+
470 CO
Vin
12V
+
100
L
RSC
0.22
CT
1500
pF
170µH
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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