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LM317E3 Folha de dados(PDF) 8 Page - Cystech Electonics Corp.

Nome de Peças LM317E3
Descrição Electrónicos  Three Terminal Adjustable Output Positive Voltage Regulators
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Fabricante Electrônico  CYSTEKEC [Cystech Electonics Corp.]
Página de início  http://www.cystekec.com
Logo CYSTEKEC - Cystech Electonics Corp.

LM317E3 Folha de dados(HTML) 8 Page - Cystech Electonics Corp.

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CYStech Electronics Corp.
Spec. No. : C513E3
Issued Date : 2003.04.09
Revised Date :2005.05.17
Page No. : 8/10
LM317E3
CYStek Product Specification
Application Circuits
+
+
-10V
-10V
Q2
2N5640
1N4001
D4
D3
Q1
2N3822
D2
D1
1N4001
1N4001
1N4001
1.0k
5.0k
RSC
D6*
1N4002
240
D5
10µF
1.0µF
Vout
Vout 2
Vin 2
Vout
1N4001
Tantalum
Vin 1
Vin
32V to 40 V
0.1µF
Adjust 1
Current Limit Adjust
PL317
PL317
(1)
(2)
Adjust 2
Iout
Voltage Adjust
Diodes D1 and D2 and transistor Q2 are added to
* D6 protects both LM317's during an input short circuit.
allow adjustment of output voltage to 0V.
Output Range:0 Vo 25V
≦≦
0Io1.5A
≦≦
Vss*
2N5640
D2
D1
1N4001
1N4001
100
R1
Vout
Vin
+25V
Adjust
PL317
Iout
1.25
R2
*To provide current limiting of Io to the system
groung, the source of the FET must be tied to a
negative voltage below -1.25V.
Fig 7. “Laboratory” Power Supply with Adjustable Current Limit and Output Voltage
R1=Vref/(Iomax+IDSS) R2≤Vref/IDSS
Vo<BVDSS+1.25V+Vss
ILmin-IDSS<Io<1.5A
As shown 0<Io<1.0A
Fig 8. Adjustable Current Limiter
+
PL317
Adjust
720
MPS2222
1.0k
TTL
Control
1.0µF
120
Vout
D1*
1N4002
Vin
*D1 protects the device during an input short circuit.
Fig 9. 5.0V Electronic Shutdown Regulator
LM317
(1)
LM317
(2)
LM317
LM317


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