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projects:Designing a cut off 12V charger with TL431

About TL431   :

The TL430, was introduced as an adjustable shunt regulator in 1976 by  Texas Instruments.

The TL431 was created as an improvement to TL430 with better accuracy and stability and was called a precision adjustable shunt regulator. The TL431 was announced as a future product in 1977 and launched in 1978
The TL431 is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5 volts) and 36 volts with two external resistors These devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excel lent replacement for zener diodes in many applications.
Lets use the voltage calculator tool:



Link :  http://www.electronics2000.co.uk/calc/potential-divider-calculator.php

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