What is TL431 IC?
The TL431 is a three-terminal adjustable precision shunt voltage regulator integrated circuit. With the use of an external voltage divider, a TL431 can regulate voltages ranging from 2.5 to 36 V, at currents up 100 mA.
What is the use of TL431?
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.
What does a shunt regulator do?
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.
Is zener a diode?
A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached.
What is adjustable shunt regulator?
Abstract: Adjustable shunt regulators known as TL431 are extensively used to build the control systems in switched-mode converter applications. The resulting control system is typically a two-loop system, where one loop defines the low frequency behavior, and the other loop the higher frequency behavior, respectively.
Why optocoupler is used in SMPS?
Optocouplers are frequently used in isolated switch-mode power supplies (SMPS) for galvanic separation between the primary and secondary sides as well as from the feedback generator.
What is the disadvantage of shunt?
The main disadvantage of shunt capacitor banks is that its reactive power output is proportional to the square of the voltage and consequently when the voltage is low and the system need them most, they are the least efficient.
What is the difference between series and shunt regulator?
Series voltage regulator has not so good voltage regulation at high load currents. In the shunt voltage regulator the output DC voltage is constant. In the series voltage regulator the output DC voltages is not constant. Shunt voltage regulator is connected in shunt with the load.
What is Zener voltage called?
(This phenomenon is called breakdown and this voltage is called breakdown voltage.) Voltage regulator diodes actively use this characteristic. Since this breakdown voltage is also called Zener voltage, voltage regulator diodes are also called Zener diodes.
What is knee voltage?
Knee voltage is the forward voltage at which the flow of the current through the PN junction of the diode increases rapidly. The knee voltage is generally observed in Zener Diodes.
Where is optocoupler used?
Optocouplers can either be used on their own as a switching device, or used with other electronic devices to provide isolation between low and high voltage circuits. You’ll typically find these devices being used for: Microprocessor input/output switching. DC and AC power control.
How do you convert TL431 to tl432?
TL431 = 1 + V) ref CL 25 TL431, TL432 www.ti.comSLVS543P –AUGUST 2004–REVISED NOVEMBER 2018 Product Folder Links:TL431 TL432 Copyright © 2004–2018, Texas Instruments IncorporatedSubmit Documentation Feedback 10.2.2 Shunt Regulator/Reference Figure 27.
How many ROHs are in a tl431aclpm?
TL431ACLPM ACTIVE TO-92 LP 3 2000 RoHS & Green SN N / A for Pkg Type 0 to 70 TL431AC TL431ACLPME3 ACTIVE TO-92 LP 3 2000 RoHS & Green SN N / A for Pkg Type 0 to 70 TL431AC
What is the recommended trip point for TL431?
For applications where TL431 is being used as a comparator, it is best to set the trip point to greater than the positive expected error (i.e. +1.0% for the A version). For fast response, setting the trip point to >10% of the
What is the voltage of tl431bq and tl432bq?
7.13 Electrical Characteristics, TL431BQ, TL432BQ over recommended operating conditions, TA= 25°C (unless otherwise noted) PARAMETER TEST CIRCUIT TEST CONDITIONS TL431BQ, TL432BQ UNIT MIN TYP MAX VrefReference voltage See Figure 20 VKA= Vref, IKA= 10 mA 2483 2495 2507 mV VI(dev)