TL431BCDBZTG4

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Power semiconductor devices are widely used in electronic circuits, such as switch mode power supplies, frequency converters, motor controllers, regulators, and other products. One of these most used components is TL431BCDBZTG4, a three pin voltage reference integrated circuit, belonging to the PMIC - Voltage Reference category.

TL431BCDBZTG4 is a low current consumption, adjustable precision shunt regulator integrated circuit made by STMicroelectronics. Its operation voltage supply range goes from 8V to 20V. It is provided in a low profile small hermetically sealed SOT-23 package, requiring no external components to function.

TL431BCDBZTG4 is based on the well-known TL431 integrated circuit family which is a voltage reference cell able to provide two different stabilized voltages. The main features of the integrated circuit are adjustable output voltage over an extended voltage range, wide power supply voltage range and low noise performance. Moreover, it has excellent stability and good temperature characteristic.

The basic application of TL431BCDBZTG4 integrated circuits is as a shunt regulator, that is, it increases or decreases the voltage supplied by a power source depending on the external feedback, making a simple voltage regulator circuit. It is frequently used in signal conditioning and signal transformation, as well as converter controllers, active filters, operational amplifiers, web-server power supply control circuit, polarity control applications and power line monitors.

The working principle of TL431BCDBZTG4 is quite straightforward. In basic terms, a TL431BCDBZTG4 relies on an internal reference voltage, which works as the output voltage of the integrated circuits under specific conditions, such as an external resistor connected between the reference voltage and a positive input pin known as the "adjustment pin", and a ground pin. When an external load, such as an LED, is connected to the device, the voltage output of the device rises as the load current increases and is thus kept supply at a pre-set output voltage.

The TL431BCDBZTG4 integrated circuit also acts as a voltage comparator, The difference between the external voltage and the internal reference voltage is known as the input differential voltage and the output of the comparator changes in a small amount of time depending on the voltage difference. The transition in the output of the circuit is determined by the input differential voltage, with a higher voltage difference corresponding to a faster output response.

TL431BCDBZTG4 is a voltage reference integrated circuit very useful for many applications. Its working principle and application field are easy to understand and master. Its relative straightforward circuit design and high performance make it a popular choice for many engineers and developers.

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