Power Supply Controller Temperature History for Service Life Assessment
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Solution Overview
Problem
Existing power supply controllers lack effective temperature anomaly detection and service life determination capabilities, particularly in managing temperature ranges and cumulative drive times, which can lead to inefficient operation and premature failure.
Innovation Solution
A power supply controller with a temperature determination circuit, measurement circuit, and nonvolatile memory that determines temperature ranges, measures drive times, and stores cumulative data to assess service life, enabling accurate anomaly detection and service life determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature monitoring is not implemented, then device complexity is reduced, but reliability deteriorates due to inability to detect temperature anomalies
Solution Approach 1:
The temperature determination circuit is integrated into the power supply controller, merging temperature monitoring functionality with the existing power management functions. This consolidation enables temperature anomaly detection without requiring a completely separate monitoring system, thus improving reliability while controlling the increase in device complexity.
Solution Approach 2:
The controller performs self-diagnosis by monitoring its own temperature through the integrated temperature determination circuit. The controller can detect temperature anomalies and determine service life based on cumulative drive time and temperature ranges, enabling self-assessment of its operational status without external intervention.
2Reliability
If cumulative drive time measurement is not implemented, then device complexity is reduced, but reliability deteriorates due to inability to determine service life
Solution Approach 1:
The measurement circuit and nonvolatile memory serve multiple functions: they track cumulative drive time across different temperature ranges, store service life determination data, and support both temperature monitoring and service life assessment. This multi-functionality enables comprehensive reliability monitoring without proportionally increasing device complexity.
Solution Approach 2:
The controller preliminarily accumulates drive time data and temperature history in the nonvolatile memory during normal operation. This preliminary data collection enables subsequent service life determination and anomaly detection without requiring complex real-time analysis, simplifying the overall system architecture.
3Measurement precision
If temperature range classification is not implemented, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The temperature monitoring range is segmented into multiple temperature ranges with different boundaries. The temperature determination circuit classifies the current temperature into specific ranges, enabling precise temperature anomaly detection. This segmentation allows the system to monitor different temperature zones with appropriate thresholds, improving measurement precision while keeping the classification logic manageable.
Data Source
AI summary
A power supply controller controls operation of a power supply apparatus that generates an output voltage from an input voltage. The power supply controller includes a temperature determination circuit configured to determine to which of a plurality of temperature ranges a temperature of the power supply controller belongs, a measurement circuit configured to measure, for each of the plurality of temperature ranges, a period for which the temperature of the power supply controller belongs to the temperature range, and a nonvolatile memory configured to store a measurement result of the measurement circuit.