TL431 is a controllable precision voltage regulator source. Its output voltage can be arbitrarily set to any value from Vref (2.5V) to 36V with two resistors. The typical dynamic impedance of this device is 0.2Ω, and it is used to replace Zener diode in many applications, such as digital voltmeter, operational amplifier circuit, adjustable voltage power supply, switching power supply, etc.
TL431 is a well-known precision reference source with excellent performance. The common DC stabilized power supply based on TL431 is shown in Figure 1. Its working principle is: BG1 and BG2 are composite power regulators, and R3 is the bias resistor of BG1. Provide base current. After BG1 current is amplified, the emitter is then sent to BG2 to amplify the current. Because BG1 and BG2 form a typical emitter output circuit, its output impedance is low and it can provide larger emitter output current, which is stable The load capacity of the voltage source provides a strong guarantee. After the output voltage is divided by R1, WI, and R2, the output sampling voltage at point F is sent to the pin sampling terminal of T1431. Because TL431 has a precision reference and voltage comparison function, after voltage comparison, its pin sends an error correction potential to control The base potential of the composite tube BG1; when the output voltage increases for some reason, the sampling voltage at point F also increases proportionally, TL431
Dynamic switching device is a non-contact, high reliability and fast switching switch used in dynamic power factor compensation equipment. It is especially suitable for fast and wear-free switching occasions. Typical applications include lifting equipment, elevators, electric welding machines and other occasions with frequent reactive power changes
Dynamic Switching Device,Capacitor Dynamic Switch Device,Capacitor Reactor Controller,Capacitor And Reactor Dynamic Switching Device
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