Temperature detection circuit, driving chip, intelligent power module and air conditioner

Abstract

The invention discloses a temperature detection circuit, a driving chip, an intelligent power module and an air conditioner, and the temperature detection circuit comprises a temperature sensing unit which is used for collecting a temperature value of a to-be-detected device and outputting a corresponding analog temperature signal; the temperature current conversion circuit is connected with the output end of the temperature sensing unit, and the temperature current conversion circuit is used for converting the analog temperature signal into a corresponding current signal; and the pulse conversion quantization circuit is connected with the output end of the temperature current conversion circuit, and the pulse conversion quantization circuit is used for converting the current signal into a pulse signal and quantizing the pulse signal to generate a digital temperature signal. On the premise of ensuring quantization precision and resolution, the chip area occupied by the temperature detection circuit in an intelligent power module, a driving chip and the like can be reduced, and meanwhile, the power consumption of the intelligent power module can also be reduced.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a temperature detection circuit, a drive chip, an intelligent power module and an air conditioner. Background technique [0002] Intelligent Power Module, or IPM (Intelligent Power Module), is a power drive product that combines power electronics and integrated circuit technology. It is generally used on electric control boards that drive fans, compressors and other equipment. Power devices are usually integrated in intelligent power modules, and the temperature rise of power devices is serious. It is necessary to detect the junction temperature of power devices, and after the temperature is detected, signal conversion is required, that is, the analog temperature signal is converted into a digital temperature signal. The converter (ADC) has a complex structure that requires a large chip area and consumes a large amount of power. In addition, the ADC circuit generally ...

AI Technical Summary

Problems solved by technology

Power devices are usually integrated in intelligent power modules, and the temperature rise of power devices is serious. It is necessary to detect the junction temperature of power devices, and after the temperature is detected, signal conversion is required, that is, the analog temperature signal is converted into a digital temperature signal. The converter (ADC) has a complex structure that requires a large chip area and high power consumption. In addition, the ADC circuit generally needs to be equipped with a digital filter to improve the quality of the output signal. The circuit is complex and increases more area and power consumption.

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