ADT7467ARQ-REEL

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ADT7467ARQ-REEL is a completely integrated capillary-action thermal control circuit that meets the requirements of modern electronic systems. It can be used to provide high precision, accurate thermal protection from excessively high temperature conditions and thermal overload protection from rapid transit time, transient temperature conditions. This application field and working principle will be explained in detail in this article.

Application Field

The ADT7467ARQ-REEL is an ideal thermal control circuit for applications such as cooling fans, system shut-down, and thermal protection. It can monitor temperature range, perform system shut down, and provide accurate and precise information on current temperature. It also provides temperature hysteresis, on-off hysteresis, temperature alarm, resistance programming, alarm output, and overtemperature shutdown protection.

It is also suitable for computer systems and consumer electronic products such as game consoles, televisions and other consumer electronic products that require tight temperature control and/or thermal protection. The ADT7467ARQ-REEL is also ideal for embedded systems, home appliances, automotive applications, and general-purpose thermal control.

Working Principle

The ADT7467ARQ-REEL utilizes two nested thermal sensor elements to form a capillary-action thermal control circuit. It senses ambient temperatures either directly or through a thermistor device. The first sensor element is a two-wire differential bridge circuit, while the second sensor is a comparator sensing element. The two sensing elements are then connected and connected to an analog voltage output. The output is then used in applications such as providing temperature alarm, system shut-down and resistance programming.

The capillary-action thermal control circuit is triggered by a single positive edge from the voltage input. The rising edge activates the capillary-action thermal control circuit and increases the output resistance by activating the internal SPICE switch. The increased resistance in the output causes the temperature sensor elements to sense a higher temperature. This results in an increased back-pressure on the thermal sensor elements and consequently, a more accurate temperature sensing.

The ADT7467ARQ-REEL has an accuracy of ±1.0°C with a 0.5°C resolution, allowing the thermal control circuit to provide precise and accurate thermal protection. The circuit can detect temperature range up to 130°C, with an overtemperature shut down at 150°C. Therefore, the ADT7467ARQ-REEL is suitable for applications that demand temperature control and protection over a wide temperature range.

Conclusion

In conclusion, the ADT7467ARQ-REEL is a capillary-action-based integrated thermal control circuit that is designed to provide precise, accurate, and reliable thermal protection from excessively high temperatures. It is suitable for a wide variety of applications, such as embedded systems, automotive applications, consumer electronic products and home appliances. The ADT7467ARQ-REEL is capable of detecting a temperature range up to 130°C and can provide a high-degree of temperature accuracy.

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