Memory Storage Device Power Management Circuit
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Solution Overview
Problem
Portable electronic devices face inconvenience when trying to charge while using external memory storage devices, as the connecting port is occupied, requiring removal from protection cases for charging.
Innovation Solution
A memory storage device with a power management circuit that allows power receipt from an external power supply when connected to both the host device and the external power supply, enabling charging without disconnecting from the host device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the memory storage device is connected to the host device via the connecting port, then the storage space of the host device is expanded, but the host device cannot be charged simultaneously because the connecting port is occupied
Solution Approach 1:
The power supply function is segmented from the data transmission function. The memory storage device includes a first connection interface for power supply and a second connection interface for data transmission, allowing independent operation of charging and data storage functions without port conflict
Solution Approach 2:
The memory storage device is designed with multi-functionality by incorporating both power reception capability and data storage capability. The power management circuit enables the device to function both as a storage device and as a power transfer intermediary, allowing charging to occur while maintaining the data connection
2Ease of manufacture
If the host device is removed from the protection case to perform charging, then charging can be performed, but user convenience is reduced due to frequent removal and reinsertion
Solution Approach 1:
The power management circuit enables continuous useful action by maintaining the memory storage device connected in the protection case while simultaneously performing charging operations. The device continuously receives power through the first connection interface and can transfer it to the host device through the same or alternative pathways, eliminating the need to interrupt the connection for charging
3Ease of operation
If the power management circuit receives power from both the host device and external power supply device simultaneously, then charging can be performed while connected, but power management complexity increases
Solution Approach 1:
The power management circuit implements dynamic power management by automatically detecting the connection state of the external power supply device and dynamically switching power supply modes. When an external power supply is detected, the circuit switches to receive power from the external source; when not detected, it switches to receive power from the host device, providing adaptive power management
Solution Approach 2:
The power management circuit acts as an intermediary between multiple power sources (host device and external power supply) and the memory storage device. It mediates the power flow by selecting the appropriate power source based on connection status, managing power distribution, and ensuring stable operation without requiring complex user intervention
Data Source
AI summary
A memory storage device having a rewritable non-volatile memory module, a first connection interface unit, a second connection interface unit, a power management circuit and a memory control circuit unit is provided. When an external power supply device is electrically connected to the second connection interface unit, the power management circuit receives a second power supply voltage from the external power supply device via the second connection interface unit, supplies an operation voltage to the rewritable non-volatile memory module and the memory control circuit unit and supplies the second power supply voltage to a host device. When the external power supply device is electrically disconnected with the second connection interface unit, the power management circuit receives a first power supply voltage from the host device via the first connection interface unit and supplies the operation voltage to the memory control circuit unit and the rewritable non-volatile memory module.