TL431IDMR2G

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Voltage references adjust a stable voltage across a resistor, regardless of changes in load current. They are used in many circuits in order to ensure the correct output voltage is maintained, even when environmental changes or electric noise might otherwise interfere. The TL431IDMR2G is one such device, an integrated dual reference designed for power management integrated circuits (PMIC). This article will explore the application fields of the TL431IDMR2G, as well as its working principles.

Application Fields of the TL431IDMR2G

The TL431IDMR2G is a precision dual reference from Texas Instruments which is suitable for a wide range of power management applications. The high accuracy of the reference (+/- 0.25% over temperature) makes it suitable for use in digital-controlled memory regulators, battery monitors, power conversion systems, supply voltage tracking and system power sequencing. Its adjustable output is compatible with a wide range of operational amplifiers (op-amps) and can be used for distributed power supplies. In addition, its RoHS-compliant package makes it suitable for use in lead-free applications and assemblies.

The TL431IDMR2G is also suitable for use in automotive applications. Its small size, low power consumption, high accuracy, and adjustable operation make it a valuable tool for monitoring power consumption and providing reference boundaries in areas such as engine control, body electronics, and climate control. In addition, its low output voltage limits can ensure that maximum current/power limits are not exceeded during fault conditions.

Working Principle of the TL431IDMR2G

The TL431IDMR2G is an integrated dual reference device, meaning it contains two reference sources in a single package. Each of the two independent references is capable of producing an adjustable or fixed voltage, or a combination of adjustable and fixed voltages. The TL431IDMR2G uses an internal sense circuit to monitor the output voltage and regulate the current accordingly, making it incredibly accurate.

It works by providing an adjustable reference voltage at its output, based on an external voltage divider. The internal reference voltage is compared with the voltage provided by the voltage divider, and the internal amplifier circuitry adjusts the current accordingly to match the desired reference voltage. The output voltage is thus adjustable, by means of changing the voltage divider-derived reference voltage.

In addition, the TL431IDMR2G also has an internal temperature compensation circuit which prevents drifts in the output voltage due to thermal effects. This compensation is achieved by sensing the die temperature and adjusting the current to maintain the output voltage across a specified temperature range.

Conclusion

The TL431IDMR2G is a precision dual reference device from Texas Instruments which is suitable for a wide range of power management applications. It is adjustable, highly accurate, and small enough to be used in automotive as well as lead-free applications. Its working principle is based on providing an adjustable reference voltage at its output, based on an external voltage divider. An internal temperature compensation circuit prevents drifts in the output voltage due to thermal effects. In summary, the TL431IDMR2G is an excellent choice for any power management challenge.

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