Multi-Channel Power Supply Standby Current Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power supply systems exhibit high standby current consumption even in sleep or idle modes due to their non-adjustable amplitude, leading to excessive power consumption in electronic devices.
Innovation Solution
A low standby consumption power supply system with multiple channels, comprising a main power supply unit, a low-current power supply unit, and an enable signal line, which allows selective power-off and standby states across different circuit blocks to minimize standby current and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the power supply system stays in standby state to wake up electronic circuit assembly at any time, then the electronic circuit assembly can be quickly activated, but the standby current consumption becomes excessively high
Solution Approach 1:
The power supply system is divided into multiple independent power supply units, each corresponding to different circuit blocks. This segmentation allows selective shutdown of power supply units based on operational needs, reducing overall standby current while maintaining the ability to quickly activate required circuits.
Solution Approach 2:
The power supply system dynamically adjusts the operational state of different power supply units based on real-time requirements. The enable signal line allows dynamic switching between power-on and power-off states for individual units, optimizing the balance between wake-up speed and standby power consumption.
2Device complexity
If the power supply system uses a single channel to supply power to the entire electronic circuit assembly, then the system structure is simple, but the standby current cannot be reduced when only partial circuits are needed
Solution Approach 1:
The single power supply channel is segmented into multiple independent power supply units, each capable of being independently controlled. This allows the system to maintain relative structural simplicity while enabling selective power distribution to different circuit blocks, thereby reducing standby current when full power is not needed.
3Ease of manufacture
If the amplitude of standby current is fixed in conventional power supply systems, then the design is straightforward, but the standby power consumption cannot be adjusted or reduced
Solution Approach 1:
The fixed standby current amplitude is replaced with a dynamic control mechanism where the enable signal line can selectively activate or deactivate power supply units. This allows the standby power consumption to be adjusted based on actual needs while maintaining relatively simple design through the use of basic switching control.
Data Source
AI summary
A low standby consumption power supply system having multi-channels for power supply is used to power first and second circuit blocks. The main supply module provides power to the first circuit-block, while the second supply module provides power to the second circuit-block. The enabling line is used to transmit an enabling signal to the main supply module to switch the main supply module from a power-off status to a power-on status. The enabling line operates under enabling mode and power-off mode. Under enabling mode, the enabling line transmit the enabling signal to the main supply module, such that the main supply module and the low-current supply module respectively provide power to the first circuit-block and the second circuit-block simultaneously. Under the power-off mode, the enabling signal is cut off and the main supply module stop providing power, so as to cut off standby current of the main supply module.