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參數(shù)資料
| 型號： | LM323T |
| 廠商： | MOTOROLA INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 5 V FIXED POSITIVE REGULATOR, PSFM3 |
| 封裝： | PLASTIC, SFM-3 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 126K |
| 代理商： | LM323T |
LM323, A
6
MOTOROLA ANALOG IC DEVICE DATA
Figure 13. Current Regulator
Figure 14. Adjustable Output Regulator
Figure 15. Current Boost Regulator
Figure 16. Current Boost with
Short Circuit Protection
5.0 V
R
Input
0.33
μ
F
LM323, A
R
IO
The LM323,A regulator can also be used as a current source when
connected as above. Resistor R determines the current as follows:
IO =
+ IB
IB
IB
0.7 mA over line, load and temperature changes
3.5 mA
For example, a 2.0 A current source would require R to be a 2.5
,
15 W resistor and the output voltage compliance would be the input
voltage less 7.5 V.
Constant
Current to
Grounded Load
Input
Output
1.0k
4
6
7
2
3
–
+
0.1
μ
F
10k
MC1741
VO, 8.0 V to 20 V
The addition of an operational amplifier allows adjustment to higher or
intermediate values while retaining regulation characteristics. The
minimum voltage obtainable with this arrangement is 3.0 V greater
than the regulator voltage.
LM323, A
0.33
μ
F
R
0.1
μ
F
Output
1.0
μ
F
The LM323, A series can be current boosted with a PNP transistor. The
2N4398 provides current to 15 A. Resistor R in conjuction with the VBE of
the PNP determines when the pass transistor begins conducting; this
circuit is not short circuit proof. Input–output differential voltage
minimum is increased by the VBE of the pass transistor.
2N4398 or Equiv
LM323, A
LM323, A
Input
Rsc
2N4398
or Equiv.
Output
R
MJ2955
or Equiv.
1.0
μ
F
The circuit of Figure 16 can be modified to provide supply protection
against short circuits by adding a short circuit sense resistor, RSC, and
an additional PNP transistor. The current sensing PNP must be able to
handle the short circuit current of the three–terminal regulator.
Therefore, an 8.0 A power transistor is specified.
Vin – VO
≥
2.5 V
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PDF描述 |
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| LM323AT | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
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| LM324KANS | QUADRUPLE OPERATIONAL AMPLIFIERS |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LM323T5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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| LM324_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Single Supply Quad Operational Amplifiers |
| LM324_08 | 制造商:HTC 制造商全稱:HTC Korea TAEJIN Technology Co. 功能描述:QUAD OPERATIONAL AMPLIFIERS |
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