heating circuit

Abstract

The present application provides a heating circuit, including a temperature sensing unit, a current amplification unit and a heating unit, wherein the temperature sensing unit generates a first voltage negatively related to the temperature according to the temperature of the electronic device, and the current amplification unit generates a first voltage based on the first voltage A heating current is generated, the heating current is amplified and input to the heating unit, and the heating unit generates heating power according to the heating current, and heats the electronic device, so that the temperature of the electronic device reaches at least the minimum temperature at which the electronic device can work. During the heating process, when the temperature of the electronic device is lower, the heating power is greater, and when the temperature of the electronic device is higher, the heating power is smaller. Therefore, the heating circuit can adjust the heating power according to the temperature, thereby Prevent the heating power from being too large or too small. Moreover, the circuit does not use high-cost ICs such as comparators and controllers, but only transistors and resistors, and the cost is low.

Description

technical field [0001] The embodiments of the present application relate to the technical field of electronic device heating, and in particular to a heating circuit. Background technique [0002] With the advent of the 5th Generation (5G), various electronic devices have penetrated into all aspects of people's lives, such as homes, vehicles, and businesses. Moreover, with the development of the Internet of Things (IOT) industry, more and more devices and objects will be implanted into electronic devices in the future, so as to realize intelligent control. Usually, electronic equipment must contain semiconductor devices, and semiconductor devices have temperature-limited characteristics, so it is difficult to ensure that electronic equipment can work normally at low temperatures. For consumer electronic equipment, the semiconductor devices produced by advanced manufacturers in the industry can work above -10°C; for industrial electronic equipment, although the semiconductor ...

AI Technical Summary

Problems solved by technology

[0004] The heating power of the above-mentioned heating circuit is a fixed value and cannot be adjusted according to the temperature. If the heating power continues to be too high, it will cause deformation of the electronic equipment; if the heating power is too small, it will cause the electronic equipment to heat up too slowly.

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