What is a programmable shunt regulator?
What is a programmable shunt regulator?
Technically the device TL431 is called a programmable shunt regulator, in simple terms it may be understood as an adjustable zener diode. The TL431 is attributed with the following main features: Output voltage settable or programmable from 2.5V (minimum reference) up to 36 volts.
How does a shunt regulator work?
Answer: A shunt regulator detects output voltage variation via external resistors by using an error amplifier and controls a transistor connected in parallel to the load to keep the output voltage constant. This then lowers the voltage of V1, which is the output voltage divided by R1 and R2.
What is a TL431 transistor?
The TL431 is a three-terminal adjustable precision shunt voltage regulator integrated circuit. The circuit can control power transistors directly; combinations of the TL431 with power MOS transistors are used in high efficiency, very low dropout linear regulators.
What is the difference between series and shunt voltage regulator?
A series regulator is connected in series with the load to stabilize the regulator’s output voltage. A shunt regulator, on the other hand, is connected in parallel to the load to stabilize the device’s output voltage.
What is shunt regulation?
The shunt regulator or shunt voltage regulator is a form of voltage regulator where the regulating element shunts the current to ground. The shunt regulator operates by maintaining a constant voltage across its terminals and it takes up the surplus current to maintain the voltage across the load.
What is TL431 used for?
The TL431 in open-loop configuration is often used in as a voltage comparator, undervoltage monitor, overvoltage monitor, window voltage detector and many other type of uses. The TL431 is a shunt voltage reference commonly used for these applications.
Which is a better regulator between shunt type and series type?
Shunt voltage regulator has poor voltage is constant. Series voltages regulator has better voltage regulation. The control element has to bear the load voltage across it. So, it is a high voltage low current device.
