TL431QDBZR Integrated Circuits (ICs)

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The TL431QDBZR is a two-terminal adjustable shunt regulator, which belongs to the Power Management IC (PMIC) voltage reference category. It is an adjustable, low-power shunt voltage reference designed to provide a stable reference voltage source. The device has a wide operating temperature range of −40°C to +125°C, to meet the requirements of various applications.

The TL431QDBZR is designed to operate with a minimum supply voltage of 4 V and can regulate a maximum output voltage of 24 V. It provides a reference voltage of 2.5 V and an accuracy of ±2% over temperature, with an initial tolerance of ±2.6 mV and low temperature coefficient that makes it suitable for precision applications. The TL431QDBZR also features a wide operating current range and a maximum output current of 10 mA. Additionally, the device has a wide operating frequency range and a low power dissipation capability.

The TL431QDBZR is used in a wide range of applications, from power supply regulation and protection, LED lighting, DC-to-DC converters, and automotive systems. It is typically used in variable power supply applications, where it can provide a stable reference voltage to regulate the output voltage. Additionally, it is used in automotive systems such as airbag deployment, ignition, fuel injectors, and cruise control. It can also be used in show lighting systems, where it can control the current flow and prevent overdriving the LEDs.

The working principle of the TL431QDBZR is based on a two-transistor circuit which operates as a constant current source. It has two-side pins, so that it can be connected to any two resistors on the surface. The two resistors are used to control the voltage across the device. When the voltage is above the reference voltage, the device acts as a current source and the voltage increases, until the voltage reaches the reference voltage level. When the voltage is below the reference voltage, the device acts as a current sink and the voltage decreases, until the reference voltage is reached. The reference voltage is maintained by the device’s internal regulating circuit, which is composed of transistors, resistors, and capacitors.

The TL431QDBZR is a versatile voltage reference device and is suitable for a wide range of applications. Its wide operating current range, low power dissipation capability, and wide operating temperature range make it an ideal choice for a variety of applications. Additionally, its accuracy and initial tolerance over temperature make it suitable for precision applications.

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