Power Supply Circuit Standby Main Switch Control
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Solution Overview
Problem
Existing power supply circuits lack a secure power source for the control circuit when the main power supply is stopped, leading to inefficiencies and potential losses during standby and non-standby times.
Innovation Solution
A power supply circuit design that includes a standby power supply, a main power supply, a switch, and a power supply control circuit, where the control circuit operates during standby time and switches power from the standby supply to the main supply during non-standby, ensuring continuous operation and reducing losses by securing power for the control circuit even when the main supply is stopped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the main power supply is stopped during standby time, then power loss in the main power supply is reduced, but the control circuit lacks a secure power source for operation
Solution Approach 1:
The patent introduces a standby power supply as an intermediary power source that activates when the main power supply is stopped. This standby supply provides continuous power to the control circuit, ensuring reliable operation during standby periods while the main supply remains inactive to minimize energy loss.
2Reliability
If the standby power supply operates continuously, then the control circuit has continuous power supply, but power consumption increases during non-standby time
Solution Approach 1:
The patent implements dynamic switching between standby and main power supplies based on operational state. During standby time, the control circuit operates on the standby power supply. During non-standby time, a switch transitions the power source from the standby supply to the main supply, dynamically adapting power consumption to operational requirements.
Solution Approach 2:
The control circuit automatically manages power source selection based on operational state. It detects whether the system is in standby or non-standby mode and autonomously switches between power supplies, eliminating the need for external control and optimizing power consumption independently.
3Productivity
If a switch is added to transition between power supplies, then power management efficiency is improved, but device complexity increases
Solution Approach 1:
The switch is controlled automatically by the control circuit based on its own operational state detection. The control circuit monitors whether it needs standby or full operation and autonomously triggers the switch to transition between power supplies, simplifying control architecture while maintaining efficient power management.
Data Source
AI summary
A power supply circuit includes: a standby power supply; a first path coupled to the standby power supply; a main power supply configured to output power a voltage of which is higher than a voltage of power output by the standby power supply; a second path coupled to the main power supply; a switch disposed between the first path and the second path; and a power supply control circuit configured to, upon detection of output of the power from the main power supply, turn on the switch to switch a power supply that supplies power to the first path from the standby power supply to the main power supply, wherein the power supply control circuit is operated by the power supplied through the first path.