Insulated Power Supply Apparatus Layout for Voltage Control
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Solution Overview
Problem
In insulated power supply apparatuses, the lengthened electric paths between transformers and control circuits lead to increased voltage drop and noise interference, compromising the accuracy of output voltage control and potentially causing malfunctions in integrated circuits.
Innovation Solution
The apparatus is designed with upper and lower arm transformers adjacent to the power supply control section on the substrate, featuring electric paths that shorten the distance between the transformers' secondary side coils and the integrated circuit, reducing voltage drop and noise interference, and employing feedback circuits to maintain target voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control circuit is positioned away from the transformer on the substrate, then the layout flexibility is improved, but the electric path length increases causing voltage drop and noise interference
Solution Approach 1:
The patent applies local quality by positioning the control circuit adjacent to the transformer specifically for voltage detection purposes, while other components can be arranged flexibly. This localized placement ensures short electric paths for critical voltage detection signals, minimizing voltage drop and noise interference, while maintaining overall layout flexibility for other components on the substrate.
2Measurement precision
If a power circuit (step-up circuit) is added to increase voltage control accuracy, then the output voltage control accuracy is improved, but heat generation increases which may adversely affect electronic components
Solution Approach 1:
The patent extracts the voltage control function from a separate power circuit (step-up circuit) and integrates it directly into the control circuit that also performs detection. By combining the detection and control functions in one circuit without requiring an additional step-up circuit, the patent achieves accurate voltage control while avoiding the heat generation problems associated with separate power conversion circuits.
3Adaptability or versatility
If the electric path between transformer and control circuit is lengthened, then the layout flexibility is improved, but noise interference increases and control accuracy deteriorates
Solution Approach 1:
The patent applies local quality by creating a localized region where the control circuit is positioned adjacent to the transformer specifically for voltage detection. This ensures short electric paths in the critical detection region, minimizing noise interference, while allowing flexible layout arrangement for other non-critical components elsewhere on the substrate.
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 configuration enhances the accuracy of output voltage control and prevents malfunctions in integrated circuits by minimizing voltage drop and noise, while also simplifying the component layout and reducing manufacturing costs.
Implementation Method 1
the power supply apparatus includes a plurality of transformers, a transistor, and a control circuit. The transistor is operated so that electricity is conducted between a DC power supply and primary side coils configuring respective transformers
Implementation Method 2
The control circuit detects output voltage of a secondary side coil configuring one of the plurality of transformers via an electric path connecting between the output side of the secondary side coil and the control circuit
Data Source
AI summary
An insulated power supply apparatus includes an upper arm transformer which has a primary side coil and a secondary side coil, a lower arm transformer which has a primary side coil and a secondary side coil, and a power supply control section which has a voltage control switching element and an integrated circuit which turns on or off the voltage control switching element. At least one of the upper arm transformer and the lower arm transformer is adjacent to the power supply control section when viewing a surface of the substrate from a front thereof. An electric path transfers output voltage of the secondary side coil of the transformer adjacent to the power supply control section, to the integrated circuit. The integrated circuit turns on or off the voltage control switching element to perform feedback control so that the output voltage detected via the electric path reaches a target voltage.