Power Adapter Sleeping Mode for Energy Loss Reduction
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Solution Overview
Problem
Conventional power adapters fail to save power when left connected to a system, as they remain in working mode even after the battery is fully charged, leading to unnecessary energy consumption.
Innovation Solution
A power adapter with a power saving mode that includes a pulse width modulation control unit and a power saving signal receiver, which transitions to a sleeping status upon receiving a fully-charged signal from the battery, and automatically recharges the battery after a predetermined time, entering a normal working mode when disconnected from the electronic apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power adapter remains in working mode after battery is fully charged, then the battery can be recharged promptly when needed, but the power adapter consumes unnecessary energy continuously
Solution Approach 1:
The power adapter dynamically transitions between working mode and sleeping mode based on real-time charging status. When the battery is fully charged, the adapter enters sleeping mode to reduce power consumption. When charging is needed again, it automatically wakes up and returns to working mode, making the system adaptive rather than static.
Solution Approach 2:
The power adapter uses feedback from the battery charging status to control its operating mode. The charging circuit detects whether the battery is fully charged and sends this information back to the main control unit, which then decides whether to maintain working mode or switch to sleeping mode, creating a closed-loop control system.
2Loss of energy
If the power adapter enters sleeping mode to save power, then energy consumption is reduced, but the response time to start charging again increases
Solution Approach 1:
The power adapter maintains a ready state in sleeping mode where essential circuits remain partially active or can be quickly activated. This preliminary preparation allows the adapter to wake up and resume charging operations rapidly when needed, rather than requiring a complete cold start from a fully powered-down state.
3Measurement precision
If the power adapter continuously monitors charging status, then charging completion is detected accurately, but the device complexity increases
Solution Approach 1:
The power adapter introduces a dedicated charging detection circuit as an intermediary component that specializes in monitoring battery charging status. This separate detection module communicates with the main control unit, allowing the main controller to focus on overall power management while the detection circuit handles the specific task of monitoring charging status, thus distributing complexity rather than concentrating it.
Data Source
AI summary
A power adapter with a power saving mode includes a power adaptation unit. The power adaptation unit includes a pulse width modulation control unit and a power saving signal receiver. The power saving signal receiver is electrically connected to the pulse width modulation control unit. When the power adapter enters a working status, the power adapter charges a battery. After the power saving signal receiver receives a battery fully-charged signal, the power adapter enters a sleeping status.