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| 型號： | HA17432VLTP |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp. |
| 中文描述： | 關(guān)于在諸如日立電器和日立二十，文件提及的瑞薩科技公司名稱變更 |
| 文件頁數(shù)： | 6/15頁 |
| 文件大小： | 146K |
| 代理商： | HA17432VLTP |
HA17431H Series
Rev.0, Sep. 2001, page 6 of 15
Application Examples
As shown in figure 1, this IC operates as an inverting amplifier, with the REF pin as input pin. The open-
loop voltage gain is given by the reciprocal of “reference voltage deviation by cathode voltage change” in
the electrical specifications, and is approximately 50 to 60 dB. The REF pin has a high input impedance,
with an input current Iref of 0.6
μ
A Typ. The output impedance of the output pin K (cathode) is defined as
dynamic impedance Z
KA
, and Z
KA
is low (0.2
) over a wide cathode current range. A (anode) is used at the
minimum potential, such as ground.
K
V
CC
OUT
V
EE
A
REF
V
Z
2.5V
–
+
Figure 1 Operation Diagram
Application Hints
No.
Application Example
Description
1
Reference voltage generation circuit
K
R
C
L
Vout
GND
Vin
GND
REF
A
This is the simplest reference voltage circuit. The value
of the resistance R is set so that cathode current I
K
≥
0.2 mA.
Output is fixed at Vout
2.5 V.
The external capacitor C
(C
≥
3.3
μ
F) is used to
prevent oscillation in normal applications.
2
Variable output shunt regulator circuit
K
R
C
L
Vout
GND
Vin
GND
A
R
1
R
2
REF
Iref
This is circuit 1 above with variable output provided.
Vout
2.5 V
×
Here,
(R
1
+ R
2
)
R
2
Since the reference input current Iref = 0.6
μ
A Typ
flows through R
, resistance values are chosen to allow
the resultant voltage drop to be ignored.
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相關(guān)代理商/技術(shù)參數(shù) |
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| HA17451AP/AFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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