Multi-Output Power Supply LLC Resonance Voltage Control
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Solution Overview
Problem
Existing apparatuses for supplying multi-output power face challenges in compactness and cost due to the need for complex circuits and high-voltage components, particularly when generating driving voltages for MOSFETs in display applications like PDPs, which require multiple output voltages and additional power units.
Innovation Solution
The apparatus employs an LLC resonance signal generated by a DC power unit, with a main output power unit and multiple output power units that output secondary voltages at different levels, eliminating the need for additional circuits to generate driving voltages for MOSFETs by using a regulator that converts voltages between output power units, allowing for low-voltage components and reduced internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a linear regulator is added to control output voltage of output power units, then voltage control is improved, but device complexity increases due to additional circuits and high-voltage components
Solution Approach 1:
The patent extracts the voltage control function from a separate linear regulator circuit and integrates it into the output power units themselves. Each output power unit independently controls its output voltage through feedback control, eliminating the need for external voltage regulation circuits and their associated high-voltage components.
Solution Approach 2:
The output power units are designed to perform multiple functions: power conversion and independent voltage control. By incorporating feedback control circuits within each output power unit, the system achieves universal voltage regulation capability across all output channels without requiring separate specialized regulation circuits for each.
2Ease of operation
If additional output power units are designed to generate driving voltage for MOSFET gates, then gate drive requirement is met, but device complexity and component count increase
Solution Approach 1:
The output power units generate their own gate driving voltages through internal feedback control circuits. Each output power unit is self-sufficient in generating the necessary gate drive signals for its MOSFETs, eliminating the need for separate dedicated power units solely for gate drive purposes.
Solution Approach 2:
The patent merges the power conversion function and gate drive generation function into a single integrated output power unit. The feedback control circuit within each output power unit simultaneously manages power conversion and generates appropriate gate driving voltages, combining multiple functions into one unified circuit block.
3Manufacturing precision
If high-voltage components are used in linear regulators, then voltage regulation capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the operating voltage parameters within each output power unit through feedback control, allowing the use of lower-voltage-rated components. By dynamically adjusting operating parameters and using frequency conversion with feedback control, the system achieves effective voltage regulation without requiring expensive high-voltage linear regulator components.
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 approach results in a more compact and cost-effective solution for multi-output power supply, reducing the need for expensive high-voltage components and enabling the use of inexpensive low-voltage components, thereby minimizing the size and cost of the apparatus while maintaining performance.
Implementation Method 1
an input power unit which generates a LLC resonance signal using a direct-current (DC) power
Implementation Method 2
a main output power unit which outputs a main voltage induced by the LLC resonance signal, and a plurality of output power units which output secondary voltages induced by the LLC resonance signal
Data Source
AI summary
An apparatus for supplying multi-output power is provided. The apparatus for supplying multi-output power includes a an input power unit which generates an LLC resonance signal using direct current (DC) power, a main output power unit which outputs a main voltage induced by the LLC resonance signal, a plurality of output power units which output secondary voltages induced by the LLC resonance signal at different level of voltages, and a first output power unit of the plurality of output power units outputs a respective one of the secondary voltages induced by the LLC resonance signal at a predetermined level of voltage using a different one of the secondary voltages output from a second output power unit of the plurality of output power units.