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參數(shù)資料
| 型號： | CS289 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | IC CONV AC/DC -12V 200MA SIP10 |
| 中文描述： | 20mA的空心轉(zhuǎn)速表驅(qū)動(dòng)電路 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 162K |
| 代理商： | CS289 |
5
I
IN
0.7V
2.1V
I
OUT/E
Q
C
P
D
C
P
+
G
F
O
C
P
R
T
V
B
C
P
D
C
P
+
G
V
R
S
Q
I
S
Q
O
F
O
N
V
C
R
T
C
T
1k
W
10k
W
TRIM
C
P
V
F/V
OUT
= 2.1 + Frequency x C
T
x R
T
(V
REG
-0 .7)
The above equations were used in calculating the follow-
ing values, where V
F/V
OUT
= 7.1V at =270 and C
T
= 0.01 F.
4 cylinder: Freq = 200Hz, R
T
= 320k
6 cylinder: Freq = 300Hz, R
T
= 220k
8 cylinder: Freq = 400Hz, R
T
= 150k
C
Tachometer Application
RPM
60
x# OF CYL.
2
= Frequency
Typical values shown above apply to a nominal value of
V
REG
of 8.5 volts. It must be realized that trimming of R
T
will be necessary to compensate for variations in regula-
tor voltage from one unit to another.
An alternative to this adjustment is to replace R
2
with a
potentiometer, as shown in Figure 2.
Partial schematic shown in Figure 3 represents one met-
hod for use with DC applications instead of frequency.
Figure 2: Alternate Trimming Method
Figure 3: DC Application
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