Power Supply Deep Standby Control via Optocoupler Feedback
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Solution Overview
Problem
Existing power supply systems for reducing standby power consumption are costly, complex, and have poor safety control, with 'intermittent operation mode' requiring relays and supercapacitors, and 'zero-power consumption standby mode' failing to enable normal operation of devices like standby indicators and infrared receivers.
Innovation Solution
A method and system using a voltage sampling circuit, optocoupler feedback circuit, and deep standby control circuit to manage power supply management, allowing the power supply to automatically adjust voltage levels and enter deep sleep mode, reducing power consumption while maintaining device functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If intermittent operation mode is used to reduce standby power consumption, then power consumption is reduced, but device complexity increases due to requirement of relays, CPU control, supercapacitors, and large-capacity capacitors
Solution Approach 1:
The patent extracts and eliminates complex components (relays, CPU control, supercapacitors, large-capacity capacitors) from the standby power reduction system, replacing them with a simplified control circuit that achieves the same power reduction effect without the need for these complex elements
Solution Approach 2:
The control circuit in the patent performs multiple functions: it controls the power supply management circuit to enter deep sleep mode, manages the output capacitor charging/discharging cycles, and maintains normal operation of standby indicator and infrared receiver, replacing what previously required multiple separate components
2Loss of energy
If zero-power consumption standby mode is used to reduce power consumption, then power consumption is reduced to near zero, but reliability deteriorates as standby indicator and infrared receiver cannot work normally
Solution Approach 1:
The patent applies local quality by providing different power supply conditions to different parts of the system: the power supply management circuit enters deep sleep mode with near-zero power consumption, while the standby indicator and infrared receiver continue to receive sufficient power to operate normally, achieving both power reduction and functionality preservation
Solution Approach 2:
The control circuit implements periodic action by cycling the power supply management circuit between deep sleep mode and active mode based on the charging state of the output capacitor, allowing the system to alternate between ultra-low power consumption and full functionality states
3Loss of energy
If intermittent operation mode with relays is used, then power consumption is reduced, but safety control deteriorates
Solution Approach 1:
The patent replaces the mechanical relay system with an electronic control circuit that uses voltage sampling and optocoupler feedback to control the power supply management circuit, eliminating the safety issues associated with mechanical relays while achieving the same power reduction effect
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
Effectively reduces standby power consumption, saves energy, and improves user experience by enabling normal operation of devices without the need for relays or supercapacitors, simplifying the circuit and reducing costs.
Implementation Method 1
operating an optocoupler feedback circuit to receive the first preset voltage and output a second level
Data Source
AI summary
Provided are a method for reducing the power consumption of a power supply, a power supply capable of automatically reducing power consumption, and a television. The power supply includes: a voltage sampling circuit, an optocoupler feedback circuit, a deep standby control circuit, a power supply management circuit and an output rectifier filter. The output rectifier filter includes an output capacitor. The feedback amount (a second level or a first level) of the optocoupler feedback circuit changes as the charge amount of the output capacitor changes, intermittently controlling the power supply management circuit to stop working while achieving a constant voltage output.