Multi-Output Flyback Control with Single Magnetic Regulation
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Solution Overview
Problem
Existing multi-output power converters often require multiple secondary windings and magnetic components for independent regulation, leading to increased cost and size, while typically only one output is tightly regulated.
Innovation Solution
A single-stage multi-output flyback converter with a single magnetic component that uses Time Slot Power Distribution Control (TSPDC) for precise, independent regulation of constant current (CC) and constant voltage (CV) outputs, enabling efficient power distribution across multiple loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple secondary windings and magnetic components are used for independent regulation of multiple outputs, then regulation precision is improved, but device complexity and size increase
Solution Approach 1:
The patent combines multiple secondary windings into a single magnetic component with multiple taps, allowing multiple outputs to be regulated independently through a single magnetic component rather than requiring separate magnetic components for each output
Solution Approach 2:
The single magnetic component serves multiple functions by providing multiple secondary outputs that can each be independently regulated, making one component perform the work of what would traditionally require multiple separate components
2Measurement precision
If multiple secondary windings and magnetic components are used for independent regulation, then regulation precision is improved, but cost increases
Solution Approach 1:
The patent merges multiple magnetic components into a single integrated magnetic component, reducing the total component count and associated manufacturing costs while maintaining the capability for independent regulation of multiple outputs
3Adaptability or versatility
If multiple secondary windings are used for each output, then independent regulation of multiple outputs is achieved, but the size of the power converter increases
Solution Approach 1:
The patent consolidates multiple secondary windings that would traditionally require separate magnetic components into a single magnetic component with multiple taps, significantly reducing the overall volume of the power converter while maintaining independent regulation capability for multiple outputs
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
The solution allows for precise and independent regulation of multiple outputs, reducing the need for multiple secondary windings and magnetic components, thereby minimizing cost and size while ensuring strict regulation accuracy for each output, suitable for applications like monitor and TV backlighting.
Implementation Method 1
a magnetic component having a primary winding coupled to an input voltage and a plurality of secondary windings electrically coupled together in series
Data Source
AI summary
A control system for use in a power converter having a plurality of outputs comprising a primary switching control block, a secondary control block, and a multi-output control block. The primary switching control block is coupled to control switching of a primary switch. The secondary control block is coupled to control switching of a synchronous rectifier switch. The multi-output control block is coupled to control switching of at least one pulse transfer switch coupled to one of the plurality of outputs. A request for an energy pulse is transferred to the primary switching control block to turn ON the primary switch to transfer the energy pulse to one of the plurality of outputs. The multi-output control block comprises an interface to send the request for the energy pulse and to receive an acknowledge signal to and from the secondary control block.