TL431BQDBZR Integrated Circuits (ICs)

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Introduction

TL431BQDBZR is a three-terminal programmable shunt regulator designed to provide user-programmable accuracy and stability. It can be used as a precision voltage reference and a current limiter. This device is designed for applications that require high accuracy, good stability, and low cost for users.The TL431BQDBZR is a functional Voltage Reference with low temperature coefficient, high stability and specified accuracy in voltage regulation. The output voltage can be adjusted over a wide range by an external resistor and the reference voltage accuracy can be achieved through the internal trimming of the manufacturing process.

Application Field of TL431BQDBZR

The TL431BQDBZR can provide Precision voltage reference and current limit circuit for applications such as portable electronic equipment, audio equipment, wireless communication, PC/peripherals and instrumentation.It can be used for adjustable high and low voltage control. It can regulate voltage with temperature-sensitive components and can improve accuracy to the maximum, so it can be widely used in the communication circuit, power management system and other applications.The TL431BQDBZR is also used in battery-backup circuits, it can help get power supply to the system if the main power is interrupted. It can provide stable and uninterrupted power supply to the whole system.

Working Principle

TL431BQDBZR uses an open-loop, three-terminal voltage regulator operating as a voltage reference and current limiter. It has an adjustable output of 2.5V to 36V with excellent temperature stability and good line regulation.The TL431BQDBZR is composed of an integrated circuit, a buffer amplifier and a precision voltage divider. It consists of two pins: cathode and anode. The cathode pin is connected to the input terminal voltage, and the anode pin is connected to the load.The buffer amplifier amplifies the reference voltage and feeds it back to the cathode pin. When the voltage at the anode pin is greater than the reference voltage, an internal voltage regulator circuit is activated and current will flow from cathode to anode. At this point, a certain voltage will appear at the anode pin and the voltage is called the reference voltage.The precision voltage divider is used to adjust the reference voltage. The precision voltage divider is connected to the outer loop of the circuit and is used to adjust the reference voltage. The voltage on the TC pin will give an indication of the output voltage of the regulator and by selecting the proper resistor values, the output voltage can be adjusted accordingly.

Conclusion

TL431BQDBZR is a three-terminal programmable shunt regulator designed to provide user-programmable accuracy and stability. It is a Precision Voltage Reference with low temperature coefficient, high stability and specified accuracy in voltage regulation, and can be used as adjustable voltage source and current limiter. This device can be used for applications such as portable electronic equipment, audio equipment, wireless communication, PC/peripherals, instrumentation, and battery-backup circuits. The TL431BQDBZR is composed of an integrated circuit, a buffer amplifier, and a precision voltage divider and works using an open-loop, three-terminal voltage regulation operating as a voltage reference and current limiter.

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