Charging Circuit Wake-Up Control for Ultra-Low Standby Power
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Solution Overview
Problem
Conventional charging devices continue to consume power in standby mode when not connected to a load device, and existing power-saving technologies either require manual intervention or additional hardware, leading to inefficiencies and safety concerns.
Innovation Solution
A power-saving charging device with a primary and secondary side controller system that autonomously transitions to a low-power state when disconnected from a load, using a power storage unit to provide power-on signals for controllers to resume operation when a load is connected, without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the charging device maintains continuous power supply to the transformer and controllers in standby state, then the device can be activated immediately when a load device is connected, but power is continuously consumed during standby
Solution Approach 1:
The system performs preliminary actions by keeping the output switch and power storage unit ready in standby mode, while shutting down the controllers. When a load is connected, the power storage unit immediately provides power-on signals to activate the controllers, achieving fast activation without continuous power consumption to the controllers during standby
Solution Approach 2:
The system dynamically transitions between two operational states: in standby state, controllers are shut down to save power while the output switch remains ready; when a load is detected, the system switches to operational state where controllers are activated. This dynamic state change resolves the contradiction between continuous readiness and power conservation
2Loss of energy
If a physical switch is added to control power supply manually, then power loss during standby is reduced, but the device complexity increases and manual intervention is required
Solution Approach 1:
The system uses the load device itself to trigger the power-on process. When a load device is connected to the output terminal, the connection detection circuit automatically detects this and triggers the power storage unit to provide power-on signals to the controllers, eliminating the need for manual switching while reducing standby power loss
Solution Approach 2:
The system implements feedback through the connection detection circuit that monitors the output terminal. When a load device is connected, the circuit provides feedback signal to activate the power storage unit and controllers. This automatic feedback mechanism replaces manual physical switches, reducing both power loss and device complexity
3Ease of operation
If the controllers remain in operation during standby, then the device can respond immediately to load connection, but power is wasted continuously
Solution Approach 1:
The system prepares for immediate operation by keeping the output switch and power storage unit in a ready state during standby, while shutting down the controllers to save power. When a load is connected, the pre-prepared power storage unit immediately activates the controllers, providing convenient automatic response without continuous power consumption
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
Significantly reduces power consumption in standby mode and enables seamless transitions to operational state upon load connection, enhancing efficiency and convenience while meeting safety standards.
Implementation Method 1
a transformer including a primary side winding and a secondary side winding
Data Source
AI summary
A power-saving charging device controls both a primary side controller and a secondary side controller to be in a shutdown state when an output terminal is not connected to the load. When the output terminal is connected to the load, the secondary side controller receives a power-on power supply from a power storage unit, performs a power-on procedure and enters a working state. The primary side controller receives a power-on signal from the power storage unit, performs the power-on procedure according to the power-on signal, and enters the working state. Accordingly, when the charging device is not connected to the load, it can enter a standby state with extremely low power consumption in which the primary side controller and the secondary side controller are both turned off, thereby achieving the effect of saving the power consumption of the controller when the charging device is in standby.