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NE556 데이터시트(PDF) 8 Page - STMicroelectronics

부품명 NE556
상세설명  General-purpose dual bipolar timers
PDF  16 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

NE556 데이터시트(HTML) 8 Page - STMicroelectronics

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



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