TL431BQDCKR Integrated Circuits (ICs)

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PMIC - Voltage Reference: TL431BQDCKR Application Field and Working Principle

The TL431BQDCKR voltage reference integrated circuit (IC) offers precise voltage regulation, basic adjustable current limit, low temperature drift, and other necessary features. It is commonly found in voltage-regulated switching power supplies, battery chargers, and other power electronics applications.

The TL431BQDCKR regulates output reference signals, as well as a reference current source. According to Linear Technology, the IC offers a temperature drift of less than 0.5mV/C and a reference current of 0.1mA to 100mA. It can be used with a wide range of supply voltages from 1.2Vdc all the way up to 36Vdc, and can accommodate high temperature operation up to 125C. The device features on-chip protection against reverse biasing, overcurrent, and short-circuiting.

The TL431BQDCKR is part of the family of voltage references manufactured by Linear Technology. The integrated circuit provides an accurate reference voltage that is derived from a bandgap voltage reference designed to operate with a wide range of supply voltages. Current feedback is used to stabilize the reference voltage at a predetermined level determined by a user-selectable external resistance divider. The voltage reference also contains an adjustable current limiting circuit that can be used to limit the maximum output current. This can be used to protect other components from overvoltages or overcurrents.

In order to understand the working principle of the TL431BQDCKR, the internal structure of the integrated circuit must first be analyzed. The device contains a bandgap voltage reference and an adjustable current limit circuit. The bandgap voltage reference is based on a temperature-compensated junction. The reference voltage is derived from the voltage generated by this junction and is then further regulated using a current feedback circuit. The current limit feature is used to set the maximum output current of the circuit.

The TL431BQDCKR is used in a variety of applications that require precise voltage regulation. Some of the most common applications are in switching power supplies, battery charging circuits, digital signal processing systems, LED lighting, and current regulated power sources. The device is particularly useful in battery charging applications due to its ability to provide a regulated current limited output to prevent overcharging.

In summary, the TL431BQDCKR is a voltage reference IC with adjustable current limiting, low temperature drift, and reverse polarity protection. Its accuracy and wide range of voltage and current ratings make it a popular choice for many precision electronics applications.

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