Adaptive USB Power Supply for Multi-Voltage Device Charging
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Solution Overview
Problem
Existing power supply devices are inefficient and costly due to the need for multiple devices to accommodate various mobile devices with different voltage and current specifications, leading to increased volume and manufacturing costs.
Innovation Solution
A power supply system comprising a target device and an adapter that includes a voltage detection unit, a voltage-change-requesting unit, and an output-voltage-changing unit, allowing for adaptive voltage adjustment via a USB data cable, enabling the same device to supply power to multiple devices with different voltage and current requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power supply device supplies a single voltage level to various devices, then the number of power supply devices required is reduced, but devices with low input voltage require elements with higher withstand voltage levels which increases manufacturing costs
Solution Approach 1:
The power supply device dynamically adjusts its output voltage based on the connected device's requirements. The controller detects which device is connected (smartphone requiring 5V or laptop requiring 12V) and changes the output voltage accordingly, eliminating the need for multiple fixed-voltage power supply devices while avoiding the need for all devices to use expensive high-voltage-rated elements.
2Power
If a power supply device supplies high current to meet high power requirements, then high power devices can be charged, but heat dissipation requirements increase and device volume increases
Solution Approach 1:
The power supply device dynamically adjusts its output current and voltage based on the connected device's power requirements. When a smartphone is connected, it supplies lower power (5V at moderate current); when a laptop is connected, it supplies higher power (12V at higher current). This dynamic adjustment allows the device to provide high power when needed without requiring permanent high-power components that would increase volume and heat dissipation requirements.
3Reliability
If multiple power supply devices are used to accommodate different voltage specifications, then each device can operate optimally, but the number of devices increases and cost burden increases
Solution Approach 1:
The power supply device is designed as a universal multi-functional device that can supply power to multiple types of devices (smartphones, tablets, laptops) with different voltage requirements. By incorporating voltage detection and dynamic voltage adjustment capabilities, a single power supply device replaces multiple dedicated devices, reducing the quantity of devices users need to carry while maintaining optimal operational efficiency for each device type.
Data Source
AI summary
A power supply system may include a target device and an adapter. The target device may include an adapter connection switch that receives adapter recognition information to form a connection with the adapter, a voltage detection unit that receives an output voltage from an adapter, and a voltage-change-requesting unit that outputs a voltage to request a voltage change based on information on the output voltage from the adapter. The adapter may include a device information recognition unit that receives the voltage to request a voltage change, and an output-voltage-changing unit that changes the output voltage based on the voltage to request a voltage change.