Switching Power Conversion Circuit Adaptive Disable for Low Standby Power
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Solution Overview
Problem
Conventional switching power supplies continue to consume electrical energy even when the electronic device is not in use, failing to meet power-saving requirements.
Innovation Solution
A two-stage switching power conversion circuit with a controlling unit that disables power supply when the electronic device is not in use, utilizing feedback signals to manage power factor correction and power status detection, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switching power supply continuously operates to transmit output voltage with rated voltage value, then the output voltage stability is improved, but the power consumption increases
Solution Approach 1:
The power supply system dynamically adjusts its operating state based on load detection. When no load is detected, the system transitions from continuous operation to a disabled state, reducing power consumption while maintaining the ability to quickly resume operation when load is applied
Solution Approach 2:
The system uses feedback signals from the system circuit to detect whether a load is connected. Based on this feedback, the control circuit adjusts the operation of the power conversion circuit, enabling it to stop providing electrical energy when no load is present, thus resolving the contradiction between continuous operation stability and power consumption
2Use of energy by moving object
If the switching power supply is disabled when no load is required, then the power consumption is reduced, but the response time to provide power increases
Solution Approach 1:
The control circuit maintains readiness to detect load conditions and can quickly transition from disabled to operational state when load is applied, minimizing response time while maintaining power savings during no-load conditions
3Ease of operation
If the power supply continuously provides electrical energy, then the system circuit can immediately operate when needed, but the power-saving requirement is not met
Solution Approach 1:
The system uses feedback signals to detect whether the system circuit is in use. Based on this feedback, the control circuit intelligently adjusts the power conversion circuit operation, disabling it when no load is present to save energy, while maintaining the capability to quickly provide power when needed
Solution Approach 2:
The power supply system automatically detects its own operational needs through feedback signals and adjusts its power provision accordingly, enabling it to save energy when not needed while maintaining availability when required
Data Source
AI summary
A switching power conversion circuit having a two-stage power circuit topology and capable of performing power factor correction is disclosed. In a case that the electrical energy of the switching power conversion circuit needs not to be provided to the system circuit, for example the load and the electronic device fails to be operated, the switching power conversion circuit will be adaptively disabled. As a consequence, the switching power conversion circuit could achieve a power-saving purpose. Moreover, the switching power conversion circuit could be applied to a power supply. When the electronic device is not in use, the power supply has reduced power consumption, thereby achieving a power-saving purpose.