Power Adapter Circuit with Dynamic Stage Disconnection for Light Load Efficiency
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Solution Overview
Problem
Conventional power adapters face inefficiencies in conversion efficiency and power loss, particularly in multi-stage power transforming circuits and during light load conditions, where switch loss is significant.
Innovation Solution
A power adapter circuit configuration comprising a power factor correction circuit, an isolation voltage step-down circuit, a switch voltage regulation circuit, and a voltage stabilization circuit, which allows for optimal operation of each stage and reduces switch loss during no load or light load periods by disconnecting the isolation voltage step-down and switch voltage regulation circuits when not needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a multi-stage power transforming circuit is used to achieve voltage transformation and regulation, then the output voltage can be precisely controlled and multiple output levels can be provided, but the total conversion efficiency decreases due to cumulative losses at each stage
Solution Approach 1:
The patent implements dynamic circuit configuration where the isolation voltage step-down circuit and switch voltage regulation circuit are selectively connected or disconnected based on load conditions. During no load or light load periods, these circuits are disconnected to eliminate switch losses. The control circuit dynamically adjusts the operating state of each circuit stage to optimize efficiency while maintaining voltage regulation capability when needed.
2Reliability
If conventional power adapter circuits operate continuously to maintain output voltage, then stable power supply is provided, but switch loss increases significantly during light load or no load conditions
Solution Approach 1:
The control circuit implements periodic monitoring of load conditions and dynamically switches the isolation voltage step-down circuit and switch voltage regulation circuit between connected and disconnected states. This periodic control based on load detection allows the system to maintain stability during normal operation while eliminating unnecessary switch losses during no load or light load periods, achieving energy savings without compromising power supply reliability when required.
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 enhances total conversion efficiency and reduces power loss during light load or no load periods, improving energy savings and operational efficiency.
Implementation Method 1
a power factor correction circuit to receive the AC input power and modulate to become a modulated power
Implementation Method 2
an isolation voltage step-down circuit connecting to the power factor correction circuit to modulate the modulated power to a modulated lower voltage power
Implementation Method 3
a switch voltage regulation circuit connecting to the isolation voltage step-down circuit to receive the tightly regulated voltage power and modulate to become a determined power at a determined output level
Implementation Method 4
a voltage stabilization circuit connecting to the switch voltage regulation circuit to regulate the determined power to become the primary output power
Data Source
AI summary
A power adapter to receive at least one AC input power and transform to DC primary output power includes a power factor correction circuit to receive the AC input power and modulate to become a modulated power, an isolation voltage step-down circuit connecting to the power factor correction circuit to modulate the modulated power to a modulated lower voltage power, a switch voltage regulation circuit connecting to the isolation voltage step-down circuit to receive the modulated lower voltage power, and a voltage stabilization circuit connecting to the switch voltage regulation circuit. The switch voltage regulation circuit sets a determined output level and regulates the modulated lower voltage power to become a determined power at the determined output level. The voltage stabilization circuit modulates the determined power to become the primary output power and supplies the primary output power to a primary output end.