Synchronous Rectifier Driver Supply Voltage Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional synchronous rectifiers require additional transformer windings or output voltage adapters to boost driver supply voltages, increasing component costs and complexity, which is undesirable in some applications.
Innovation Solution
A method and circuit for generating a supply voltage for a synchronous rectifier driver circuit using a converted voltage from a transformer's secondary winding, where the supply voltage is higher than the output voltage, without the need for additional transformer windings or adapters, by utilizing switches and a voltage supply circuit to optimize energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional transformer windings or output voltage adapters are used to boost driver supply voltages, then the driver circuit can achieve sufficient drive voltage, but component costs and device complexity increase
Solution Approach 1:
The patent combines the driver supply voltage generation with the existing transformer structure by utilizing the secondary winding and associated components. The flyback converter circuit integrates the voltage boosting function into the power conversion path, eliminating the need for separate voltage adapter circuits or additional transformer windings. This merging approach maintains driver circuit reliability while reducing overall device complexity.
Solution Approach 2:
The secondary winding of the transformer serves multiple functions: it provides the output voltage for the load and simultaneously generates the driver supply voltage through the flyback converter circuit. This multi-functionality eliminates the need for dedicated voltage boosting components, reducing device complexity while ensuring reliable driver operation.
2Reliability
If additional transformer windings are used to boost driver supply voltages, then sufficient drive voltage is achieved, but the number of transformer outputs increases
Solution Approach 1:
The patent merges the driver supply voltage generation function into the existing secondary winding output path. The flyback converter circuit processes the secondary winding output to generate the required driver voltage, eliminating the need for additional transformer windings and their associated outputs. This approach maintains reliable driver operation while keeping the transformer structure simple with minimal outputs.
3Ease of manufacture
If conventional voltage supply methods are used for SR driver circuit, then component costs increase, but energy transfer efficiency may be compromised
Solution Approach 1:
The patent implements a self-service approach where the flyback converter circuit generates the driver supply voltage autonomously from the transformer secondary winding output. This eliminates the need for external voltage boosting components, reducing component costs. The direct energy transfer from the secondary winding through the flyback converter maintains high energy transfer efficiency without requiring additional expensive voltage adapter 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 reduces component costs and allows for efficient energy transfer to the synchronous rectifier driver circuit, enhancing the efficiency and effectiveness of power converters while avoiding the need for extra transformer outputs.
Implementation Method 1
receiving a converted voltage from a secondary winding of a transformer
Data Source
AI summary
Methods for supplying a synchronous rectifier (SR) driver circuit and supply voltage generation circuits for a SR driver circuit are described. In one embodiment, a method for supplying a SR driver circuit involves receiving a converted voltage from a secondary winding of a transformer and generating a supply voltage for the SR driver circuit based on the converted voltage, where the supply voltage is higher than an output voltage of the transformer that is generated using the secondary winding. Other embodiments are also described.