Power Supply Apparatus Dynamic Stand-by Timing Control
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Solution Overview
Problem
Conventional switching power supply apparatuses have a uniform operation start timing set based on low input voltage conditions, leading to delayed activation regardless of the actual input voltage from commercial AC power supplies, due to the need for the output voltage from the boost converter to reach a normal range before activating the power supply control IC.
Innovation Solution
A power supply apparatus with a voltage detection unit, first and second voltage conversion units, and a control unit that determines a stand-by time period for activating the second voltage conversion unit based on the detected input voltage, allowing earlier activation of the power supply control IC by adjusting the connection of the AC power supply to the first voltage conversion unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operation start timing is set uniformly based on low input voltage conditions, then the power supply control IC can be activated stably, but the activation timing is delayed regardless of the actual input voltage
Solution Approach 1:
The patent applies dynamics by making the stand-by time period variable rather than fixed. The control unit dynamically adjusts the stand-by time period based on the detected input voltage level. When input voltage is high, the stand-by time is shortened; when input voltage is low, the stand-by time is extended. This dynamic adjustment allows the system to optimize activation timing for each specific operating condition, resolving the contradiction between stable activation and timing delay.
Solution Approach 2:
The patent changes the parameter of stand-by time period based on the input voltage parameter. By detecting the input voltage level and corresponding the detected value to an appropriate stand-by time period, the system adapts its timing characteristics to match the actual operating conditions. This parameter change approach enables earlier activation when voltage is high while maintaining reliable activation when voltage is low.
2Reliability
If the stand-by time period is extended to ensure stable activation, then the power supply control IC can be activated reliably, but the overall activation time increases
Solution Approach 1:
The system dynamically adjusts the stand-by time period based on detected input voltage. When input voltage is high, the stand-by time is shortened, enabling faster activation. When input voltage is low, the stand-by time is extended to ensure reliable activation. This dynamic timing adjustment resolves the contradiction between reliability and activation speed by optimizing the stand-by period for each specific voltage condition.
Solution Approach 2:
The patent changes the stand-by time period parameter according to the input voltage parameter. By establishing correspondence between detected voltage values and appropriate stand-by time periods, the system achieves both reliable activation and optimized activation speed. The parameter change allows the system to use shorter stand-by times when voltage conditions permit, thereby improving productivity without sacrificing reliability.
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 solution enables the power supply apparatus to advance its operation start timing according to the input voltage, ensuring stable and timely activation of the power supply control IC, even with a boost converter in the previous stage, thus improving operational efficiency.
Implementation Method 1
a voltage detection unit configured to detect an input voltage input from an alternating current power supply
Implementation Method 2
a first voltage conversion unit configured to convert the input voltage into a first voltage
Implementation Method 3
a second voltage conversion unit that is connected to the first voltage conversion unit and configured to convert the first voltage output from the first voltage conversion unit into a second voltage different from the first voltage
Data Source
AI summary
The power supply apparatus includes a control unit configured to determine a stand-by time period from making a connection of a switch unit to subjecting a second voltage conversion unit to activation according to an input voltage of the alternating current power supply detected by a voltage detection unit.