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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)： | 8/15頁 |
| 文件大?。?/td> | 146K |
| 代理商： | HA17432VLTP |
HA17431H Series
Rev.0, Sep. 2001, page 8 of 15
Application Hints
(cont.)
No.
Application Example
Description
6
Constant voltage regulator circuit
V
CC
R
1
R
2
R
3
Cf
Q
Vout
GND
GND
This is a 3-pin regulator with a discrete configuration, in
which the output voltage
Vout = 2.5 V
×
(R
2
+ R
3
)
R
3
R
is a bias resistance for supplying the HA17431H
cathode current and the output transistor Q base
current.
7
Discharge type constant current circuit
GND
V
CC
R
R
S
Q
L
2.5 V
+
–
I
L
This circuit supplies a constant current of
I
L
[A] into the load. Caution is required
2.5 V
R
S
since the HA17431H cathode current is also
superimposed on I
L
.
The requirement in this circuit is that the cathode
current must be greater than Imin = 0.2 mA. The I
setting therefore must be on the order of several mA or
more.
8
Induction type constant current circuit
GND
V
CC
R
Q
L
2.5 V
+
–
I
L
R
S
In this circuit, the load is connected on the collector
side of transistor Q in circuit 7 above. In this case, the
load floats from GND, but the HA17431H cathode
current is not superimposed on I
, so that I
can be kept
small (0.2 mA or less is possible). The constant current
value is the same as for circuit 7 above:
I
L
[A]
2.5 V
R
S
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相關代理商/技術參數(shù) |
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| HA17432VUP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Shunt Regulato |
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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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