IC Power Dissipation Estimation for Thermal Runaway Control
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Solution Overview
Problem
Existing integrated circuits (ICs) with power converter and amplifier circuitry face inefficiencies leading to significant power dissipation and temperature increases, which are not effectively monitored by localized temperature sensors, potentially causing thermal runaway and performance issues.
Innovation Solution
A system that estimates power dissipation and efficiency by using processing circuitry to determine input and output power values based on monitored voltage and current signals, allowing for real-time monitoring and control of IC temperature and operational parameters to prevent overheating and inefficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power converter circuitry and amplifier circuitry are integrated in a single IC device, then device integration and space efficiency are improved, but power dissipation and temperature increase worsen
Solution Approach 1:
The patent segments the IC device into distinct functional regions: a first region housing power converter circuitry and a second region housing amplifier circuitry. This spatial segmentation allows separate monitoring and control of power dissipation in each region, addressing the thermal management challenges of integrated designs while maintaining the space efficiency benefits of integration.
2Power
If power converter circuitry converts low input voltage to high output voltage, then output power capability is improved, but power dissipation and efficiency worsen
Solution Approach 1:
The patent implements feedback mechanisms where processing circuitry monitors voltage and current parameters of the power converter circuitry and uses this information to control operation. The system determines power dissipation based on measured voltage across and current through the power converter, enabling real-time feedback control to optimize efficiency while maintaining required output power capability.
3Measurement precision
If temperature sensors are used to monitor IC temperature, then temperature detection capability is improved, but measurement precision worsens due to localized heating
Solution Approach 1:
The patent uses processing circuitry as an intermediary to calculate temperature effects. Instead of relying solely on physical temperature sensors that may be positioned away from heat-generating components, the system uses measured voltage and current parameters as intermediaries to determine power dissipation and infer temperature conditions in specific regions, providing more accurate localized thermal monitoring.
4Power
If output voltage and current are increased to provide sufficient power to load, then power output to load is improved, but power dissipation in amplifier circuitry worsens
Solution Approach 1:
The patent implements dynamic control where processing circuitry continuously monitors operating parameters and adjusts power converter and amplifier operation in real-time. The system dynamically determines power dissipation based on instantaneous voltage and current measurements, enabling adaptive control that optimizes the balance between power output to the load and power dissipation in the amplifier circuitry.
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
Enables real-time tracking of power dissipation and efficiency, preventing thermal damage and maintaining ICs within safe operating conditions, reducing the risk of thermal runaway and electromigration.
Implementation Method 1
determine a power dissipation value based on the determined output power value and the determined input power value
Data Source
AI summary
A system for estimating power dissipation in an integrated circuit comprising a power converter and an amplifier, the system comprising processing circuitry configured to: receive a signal indicative of an output voltage to a load which, in use of the integrated circuit, is driven by the amplifier; receive a signal indicative of an output current to the load; determine an output power value based on the received signal indicative of the output voltage to the load and the received signal indicative of the output current to the load; receive a signal indicative of an input voltage to the power converter; receive a signal indicative of an average current input to the power converter; determine an input power value based on the received signal indicative of the input voltage to the power converter and the received signal indicative of the average current input to the power converter; and determine a power dissipation value based on the determined output power value and the determined input power value.