Semiconductor Junction Heating Control for Low-Temperature Operation
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Solution Overview
Problem
Existing semiconductor devices face challenges in ensuring normal operation at low ambient temperatures, as techniques primarily focus on preventing excessive heating without addressing the issue of excessively low junction temperatures, which can hinder logical block operation.
Innovation Solution
A semiconductor device configuration that includes a controller to manage power dissipation by a power consumption circuit, ensuring the junction temperature remains above a predetermined lower operational limit through a temperature sensor, thereby extending the ambient temperature range for normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ambient temperature range is extended to lower temperatures, then semiconductor device can operate in colder environments, but logical block operation cannot be ensured due to excessively low junction temperature
Solution Approach 1:
The system performs preliminary heating by increasing power dissipation before the logical block needs to operate at low ambient temperatures. The temperature sensor detects low junction temperature conditions and the controller proactively increases power dissipation to raise the junction temperature to the operational range, ensuring reliable logical block operation when needed.
Solution Approach 2:
A feedback mechanism is implemented where the temperature sensor continuously monitors junction temperature and provides feedback to the controller. Based on this feedback, the controller adjusts power dissipation to maintain junction temperature within the operational range, ensuring logical block reliability across extended ambient temperature ranges.
2Reliability
If power dissipation is increased to maintain junction temperature, then logical block operation is ensured at low ambient temperatures, but excessive heat generation may occur
Solution Approach 1:
The feedback mechanism monitors junction temperature and adjusts power dissipation accordingly. Power dissipation is increased only when and as much as needed to maintain junction temperature above the lower operational threshold, preventing unnecessary heat generation while ensuring logical block operation. The system dynamically balances reliability and energy efficiency based on real-time temperature conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows the semiconductor device to operate within a lower ambient temperature range, ensuring the logical block's normal operation and reducing design complexities due to temperature constraints, while also reducing the risk of excessive junction temperature increases.
Implementation Method 1
a temperature sensor for measuring a junction temperature
Implementation Method 2
controlling the dissipation of power by the power consumption circuit such that the junction temperature measured at the temperature sensor is not less than a predetermined lower operational limit temperature
Data Source
AI summary
Methods of controlling semiconductor device and semiconductor device are provided in which a semiconductor device can define a normally operational ambient temperature at a low level. The Microcontroller includes a logical block, a temperature sensor for measuring junction temperature, a power consumption circuit for consuming predetermined power, and a Controller for controlling the consumption of power by the power consumption circuit such that the temperature measured at the temperature sensor is not less than a predetermined operational lower limit temperature of the logical block 110.