The TL431 is a popular adjustable precision shunt regulator, and I assume you might mean it instead of TL4311C as there isn't common knowledge about a TL4311C. Here's the pinout information for the standard TL431:
1. Three - pin TO - 92 Package
This is a very common package for the TL431.
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Cathode (K):
- It is the output terminal that connects to the positive side of the power supply through a current - limiting resistor. When the device is regulating, current flows from the cathode to the anode. In a typical application, it is connected to the load in a way that helps maintain a stable voltage.
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Anode (A):
- This pin is connected to the ground or the negative reference point of the circuit. It provides the return path for the current flowing through the device.
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Reference (R):
- This is the input terminal used to set the regulated output voltage. By connecting appropriate resistors between the cathode, anode, and the reference pin, you can adjust the output voltage of the TL431. The reference voltage for the TL431 is approximately 2.5V.
2. Other Packages
There are also surface - mount packages like SOT - 23. The pin functions remain the same as in the TO - 92 package, but the physical layout and dimensions are different to suit surface - mount assembly on printed circuit boards.
Here is a simple example circuit using the TL431 in a TO - 92 package to create a regulated voltage source:
plaintext
+Vcc
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R1
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+---+ K (Cathode)
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| |
| |
| |
| |
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| R
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| |
| |
| |
| |
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| +---+ A (Anode)
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+-------+
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GND
In this circuit, by choosing appropriate values for resistors R1 and the resistive network connected to the reference pin, you can set the desired output voltage across the load connected between the cathode and ground.
If you really meant TL4311C and there are specific differences in its pinout, you may need to refer to the device's datasheet provided by the manufacturer for accurate information.