Integrated Circuit Isolated Switching Power Feedback Control
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Solution Overview
Problem
Existing electronic circuits using isolated switching power sources require external control circuits, leading to increased size and complexity, which complicates their integration with integrated circuits (ICs) for driving target devices.
Innovation Solution
The electronic circuit integrates a driver and operating module within the IC to manage the isolated switching power source, allowing for feedback control of output power while maintaining electrical isolation, thereby reducing the overall circuit size by eliminating the need for external control circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an isolated switching power source with an external control circuit is used, then the power supply can perform feedback control of output power, but the electronic circuit size increases due to the additional external control circuit
Solution Approach 1:
The patent merges the control circuit functionality into the integrated circuit itself. The IC includes a control unit that performs feedback control of the output power by receiving output information from the output circuit region and adjusting the switching element control accordingly. This integration eliminates the need for separate external control circuits while maintaining the feedback control capability, thus resolving the contradiction between reliability and circuit size.
2Device complexity
If an isolated switching power source is integrated with an IC, then the circuit complexity is reduced, but the electrical isolation between input and output regions must be maintained
Solution Approach 1:
The patent divides the integrated circuit into distinct functional regions: an input circuit region that receives input power, a output circuit region that provides output power, and a control unit that bridges these regions. The control unit is electrically connected to both regions but maintains proper isolation boundaries. This segmentation allows the IC to be integrated while preserving the electrical isolation between input and output, resolving the contradiction between integration and isolation reliability.
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 enables a more compact electronic circuit design that effectively manages power supply to target devices, enhancing efficiency and reducing the physical size of the circuitry.
Implementation Method 1
a transformer that partitions the circuit region of the isolated switching power source into an input circuit region in which a power source lies and an output circuit region while the input circuit region is electrically isolated from the output circuit region
Implementation Method 2
the isolated switching power source outputs, via a switching element, power supplied from the power source to the output circuit region
Data Source
AI summary
In an electronic circuit, a first circuit region is electrically connected to an input circuit region of an isolated switching power source, and a second circuit region is electrically connected to an output circuit region thereof. A driver of an IC is located in the second circuit region and drives a target device based on output power supplied to the second circuit region via the output circuit region from the isolated switching power source. A transferring module of the IC transfers a value of a parameter indicative of the output power from the second circuit region to the first circuit region while maintaining electrical isolation between the first and second circuit regions. An operating module of the IC performs on-off operations of a switching element to perform feedback control of the value of the parameter indicative of the output power to a target value.