SA556D 데이터 시트보기 (PDF) - STMicroelectronics
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SA556D Datasheet PDF : 16 Pages
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Application information
4
Application information
NE556 - SA556 - SE556
4.1
Typical application
Figure 12. 50% duty cycle oscillator
VCC
Output
4
(10)
6 (8)
14
(13) 1
1/2
NE556
SE556
(12) 2
Rs
22kW
RA
51kW
5 (9)
(11) 3
0.01nF
7
C
t1 = 0.693 RA.C
t2 = [(RARB)/(RA+RB)]CLn
-R----B------–----2----R-----A--
2RB – RA
f = -------t--1------- RB < 1-- RA ti
t1 + t2
2
Figure 13. Pulse width modulator
t2
t1
VCC
RA
Trigger
4
(10)
6 (8)
14
(13) 1
1/2
NE556
SE556
(12) 2
Output
5 (9)
(11) 3
7
C
MODULATION
INPUT
8/16
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