Power Supply Circuit Ship Mode Delay Control
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Solution Overview
Problem
Portable electronic devices face challenges in efficiently managing power supply to prevent battery degradation and leakage currents when switching to a ship mode, particularly in scenarios where sudden power-offs can occur due to voltage drops, leading to potential device malfunctions.
Innovation Solution
An electronic device with a power supply circuit that includes a control circuit and a connection control switch, configured to receive a ship mode command and delay the power-off operation by a preset time, ensuring the battery remains disconnected from the power supply circuit until a predetermined voltage threshold is reached, thereby preventing leakage currents and maintaining battery voltage for a longer period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the power supply circuit immediately shuts off power to the processor when a ship mode command is received, then the response time to enter ship mode is reduced, but voltage drops can occur leading to device malfunctions and battery degradation
Solution Approach 1:
The power supply circuit performs preliminary actions by initiating a controlled power-off sequence before completely shutting off power. The circuit delays the disconnection of the battery from the power supply circuit by a preset time period, allowing the processor to complete its power-off sequences and preventing voltage drops that could cause malfunctions.
Solution Approach 2:
The preset time delay acts as a cushioning period that prevents sudden voltage drops. During this delay period, the battery remains connected to the power supply circuit, providing a buffer that prevents harmful voltage fluctuations while still enabling the device to transition to ship mode.
2Object-generated harmful factors
If the power supply circuit immediately disconnects the battery when switching to ship mode, then leakage currents are prevented, but sudden power-offs can cause battery degradation
Solution Approach 1:
The power supply circuit performs preliminary disconnection of the battery from the power supply circuit before completely entering ship mode. This preliminary action allows the processor to complete its power-off sequences, preventing sudden power-offs that could degrade the battery while still achieving leakage current prevention.
Solution Approach 2:
The preset time delay provides a cushioning period that protects the battery from sudden disconnection. During this delay, the battery remains connected, allowing for a gentle transition that prevents battery degradation while still achieving the ultimate goal of preventing leakage currents in ship mode.
3Loss of time
If the processor performs power-off sequences immediately when a ship mode command is received, then the transition to ship mode is faster, but voltage drops during the sequence can cause malfunctions
Solution Approach 1:
The power supply circuit acts as an intermediary between the processor and the battery. It receives the ship mode command and manages the power-off sequence timing, using a preset time delay to coordinate the disconnection of the battery after the processor completes its sequences, thereby preventing voltage drops and ensuring stable transition.
Data Source
AI summary
An electronic includes: a battery; a power supply circuit electrically connected to the battery; and a processor configured to receive power through the power supply circuit, wherein the power supply circuit may be further configured to, based on a ship mode command received from the processor at a first time, switch an operation mode of the electronic device to a ship mode of the electronic device by shutting off power supplied to the processor by the battery at a second time that is delayed from the first time by a preset time.