Power Supply IC Type Detection via Terminal Voltage States
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Solution Overview
Problem
Integrated circuits used in power supply circuits face challenges in determining whether they are operating in non-isolated or isolated power supply circuits due to potential failures in coupling to terminals, leading to improper operation of determination circuits.
Innovation Solution
The integrated circuit includes a state-indicating circuit that generates distinct voltages based on the type of power supply circuit, using a voltage generation circuit to produce specific voltage levels at a terminal, allowing a determination circuit to accurately identify the type of power supply circuit and a driver circuit to control the power transistor accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a determination circuit is used to identify power supply circuit type, then the integrated circuit can adapt to different power supply configurations, but the determination circuit may fail to operate properly when terminal coupling failures occur
Solution Approach 1:
The voltage generation circuit proactively generates distinct voltage levels at the first terminal based on the power supply circuit type before the determination circuit needs to make its decision. This preliminary voltage establishment ensures that even if terminal coupling fails during operation, the determination circuit receives a stable voltage signal that accurately reflects the power supply configuration, enabling reliable type identification throughout the device lifecycle.
Solution Approach 2:
The patent introduces a voltage generation circuit as an intermediary component between the power supply circuit and the determination circuit. This intermediary actively generates and maintains distinct voltage levels that serve as reliable indicators of the power supply circuit type, mediating the information transfer in a way that is immune to terminal coupling failures and ensuring the determination circuit always receives accurate classification signals.
2Reliability
If the integrated circuit switches between different state-indicating circuits based on power supply type, then proper operation can be ensured, but complex voltage level management is required to handle all states including terminal coupling failures
Solution Approach 1:
The voltage generation circuit applies local quality by generating distinct voltage levels specifically at the first terminal, creating a localized voltage signature that indicates the power supply circuit type. This localized voltage management simplifies the overall system complexity because only the specific terminal requiring state indication needs specialized voltage handling, while the rest of the determination circuit can use standard voltage comparison logic.
Data Source
AI summary
An integrated circuit for a power supply circuit that includes a state-indicating circuit, which is a first or second circuit when the power supply circuit is of a non-isolated or isolated type, as the case may be. The integrated circuit including a voltage generation circuit that generates, at a first terminal, a voltage that is (1) lower than a first level, when the first circuit is coupled to the first terminal, (2) higher than a second level, when the second circuit is coupled to the first terminal, and (3) higher than the first level and lower than the second level, when no state-indicating circuit is coupled to the first terminal, and a determination circuit that determines that the power supply circuit is of the non-isolated or isolated type, when the voltage at the first terminal is lower or higher than the second level, as the case may be.