Auxiliary Voltage Conversion for Wide-Range Power Adapter Control
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Solution Overview
Problem
Power adapters with wide-range output voltages face increased power consumption and efficiency losses due to varying auxiliary power supply voltages, leading to higher heat generation and reduced efficiency.
Innovation Solution
A control circuit with a voltage conversion unit that boosts or bucks the input voltage to match the working voltage of the switch control unit, reducing power supply loss and improving efficiency by maintaining a relatively small varying range of the auxiliary power supply voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the auxiliary power supply voltage varies with wide-range output voltage, then the power adapter supports multiple output voltages, but the power consumption of the auxiliary power supply increases and efficiency decreases
Solution Approach 1:
A voltage conversion unit is introduced as an intermediary between the auxiliary power supply and the control circuit. This unit converts the varying auxiliary power supply voltage into a stable voltage for the control circuit, preventing the control circuit from directly experiencing the voltage variations that would cause increased power consumption and efficiency loss.
Solution Approach 2:
The voltage conversion unit dynamically adjusts the output voltage parameter to maintain a stable voltage level for the control circuit regardless of the input voltage variations from the auxiliary power supply. This parameter stabilization ensures the control circuit operates efficiently across the wide output voltage range.
2Adaptability or versatility
If the auxiliary power supply voltage varies with wide-range output voltage, then the power adapter supports multiple output voltages, but heat generation increases and efficiency decreases
Solution Approach 1:
The voltage conversion unit serves as a thermal management intermediary by stabilizing the voltage supplied to the control circuit. This stabilization prevents excessive current draw and power dissipation in the control circuit, thereby reducing heat generation while maintaining wide output voltage support capability.
3Adaptability or versatility
If the control circuit receives varying power supply voltage, then the power adapter supports wide-range output, but the power supply loss increases
Solution Approach 1:
The voltage conversion unit acts as a protective intermediary that isolates the control circuit from the varying auxiliary power supply voltage. By converting the variable voltage into a stable output, it prevents power supply losses that would occur if the control circuit directly processed the varying voltage across the wide output range.
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 reduces power supply loss and consumption in power adapters by ensuring the auxiliary power supply voltage stays within a small range, thereby enhancing efficiency and minimizing heat generation.
Implementation Method 1
The voltage conversion unit is configured to: receive a first direct current voltage, and generate a second direct current voltage based on the first direct current voltage
Data Source
AI summary
A control circuit applied to a power adapter includes a voltage conversion unit and a switch control unit. The voltage conversion unit is configured to: receive a first direct current voltage, and generate a second direct current voltage based on the first direct current voltage, where when the first direct current voltage is lower than a working voltage of the switch control unit, the voltage conversion unit is configured to boost the first direct current voltage, to obtain the second direct current voltage. The switch control unit is configured to: receive the second direct current voltage from the voltage conversion unit, and use the second direct current voltage as a power supply voltage of the switch control unit.