IPS Temperature Correction for Accurate Overcurrent Detection
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Solution Overview
Problem
Conventional intelligent power switches (IPS) suffer from deteriorating operation accuracy due to temperature-dependent characteristics of semiconductor elements, leading to potential malfunction during overcurrent conditions.
Innovation Solution
A semiconductor device with a temperature detection circuit and correction circuit that adjusts the output current based on temperature changes, compensating for temperature-dependent variations in semiconductor elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If semiconductor elements are used in IPS devices, then the device functionality and power handling capability are improved, but the operation accuracy deteriorates due to temperature-dependent characteristics
Solution Approach 1:
The patent implements a feedback mechanism where the temperature detection circuit continuously monitors the temperature of the semiconductor element and provides temperature information to the correction circuit. The correction circuit then adjusts the overcurrent detection threshold based on this temperature feedback, compensating for temperature-dependent variations and maintaining accurate operation across different temperature conditions.
Solution Approach 2:
The patent changes the overcurrent detection threshold parameter dynamically based on temperature. The correction circuit modifies the detection threshold according to the detected temperature, effectively adapting the operational parameters of the IPS device to compensate for temperature effects on semiconductor characteristics.
2Measurement precision
If temperature compensation is added to correct temperature-dependent variations, then the operation accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent merges the temperature detection function and overcurrent detection function into a single integrated device. The temperature detection circuit, correction circuit, and overcurrent detection circuit work together as an integrated system, reducing the need for separate external compensation components and minimizing overall device complexity while maintaining improved operation accuracy.
Data Source
AI summary
A semiconductor device, including: a semiconductor element configured to generate an output current that varies with a change in a temperature of the semiconductor element; a temperature detection circuit that detects the temperature and outputs a temperature detection signal based on the detected temperature; and a correction circuit that causes the output current of the semiconductor element to change based on the temperature detection signal.