Parallel Connection Regulating Circuit of TL431

Published:2011/7/24 7:09:00 Author:Michel | Keyword: Parallel Connection, Regulating Circuit | From:SeekIC

The picture a and b are parallel connection regulating circuits of TL431.The minimum current of regulating circuit (a) is 200μA,maximum current can reach 8A and dynamic range is 91.8dB.The minimum current of regulating circuit (ab) is 1mA,maximum current can reach 8A and dynamic range is 78dB.This circuit can be used as power regulating tube and its main application is as follows. Fisrt,it is used as parallel connection regulating circuit(high power regulating tube)with large current(8A)and high accuracy.Second,it is used as power supply circuit which changes +5V voltgae into +3.3V/8A.Third,it is used in voltage clamp with large current and high accuracy and thus it can be used as overvoltage protection circuit of DC power supply.TL431 cathode voltage range is main difference of circuit (a)and (b).



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