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LM317 Folha de dados(PDF) 8 Page - ON Semiconductor

Nome de Peças LM317
Descrição Electrónicos  1.5 A Adjustable Output, Positive Voltage Regulator
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Fabricante Electrônico  ONSEMI [ON Semiconductor]
Página de início  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LM317 Folha de dados(HTML) 8 Page - ON Semiconductor

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LM317, NCV317
http://onsemi.com
8
Figure 21. D2PAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
2.0 oz. Copper
L
L
30
40
50
60
70
80
010
20
30
25
15
5.0
L, LENGTH OF COPPER (mm)
1.0
1.5
2.0
2.5
3.0
3.5
Minimum
Size Pad
Free Air
Mounted
Vertically
RqJA
PD(max) for TA = +50°C
Figure 22. ‘‘Laboratory’’ Power Supply with Adjustable Current Limit and Output Voltage
D6*
1N4002
Vin
32 V to 40 V
Vin1
LM317
(1)
Adjust 1
Vout1 RSC
Vin2
Vout 2
Iout
Vout
IN4001
IN4001
240
D5
1N4001
+
1.0
mF
Tantalum
1.0K
Current
Limit
Adjust
Q1
2N3822
5.0 k
Adjust 2
Voltage
Adjust
+
10
mF
D3
D4
D1
1N4001
Q2
2N5640
-10 V
Output Range:0
≤ VO ≤ 25 V
Output Range: 0
≤ IO ≤ 1.5 A
* Diodes D1 and D2 and transistor Q2 are added to
* allow adjustment of output voltage to 0 V.
* D6 protects both LM317's during an input short circuit.
D2
1N4001
-10 V
0.1
mF
LM317
(2)


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