USB Hub Power Switch Topology for Charge-Through
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Solution Overview
Problem
USB hubs with USB-C ports cannot charge devices connected to downstream-facing ports with charge-through functions when a power adapter is connected to the upstream-facing port, limiting the ability to charge multiple devices simultaneously.
Innovation Solution
A USB hub design with multiple power switches and converters that allows the hub to operate in different modes, enabling power delivery from a power adapter to both upstream and downstream ports, including a charge-through mode where the adapter can charge devices connected to USB connectors with charge-through functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the power adapter is coupled to the upstream-facing port of the hub, then the hub can receive power from the adapter, but the adapter cannot charge other devices coupled to the USB connector with the charge-through function
Solution Approach 1:
The patent divides the power transmission path into multiple independent segments controlled by separate power switches. When the adapter is connected to the upstream-facing port, the first power switch routes power to the hub's internal circuitry while the second power switch enables charge-through transmission to downstream devices. This segmentation allows simultaneous power reception and charge-through charging without interference.
Solution Approach 2:
The patent implements dynamic power routing through multiple power switches that can be selectively activated based on the connection configuration. The control circuit dynamically determines whether to enable the first power switch (for hub power supply), the second power switch (for charge-through), or both simultaneously, allowing the system to adapt its power transmission mode according to real-time connection status.
2Adaptability or versatility
If the hub operates in charge-through mode with adapter connected to downstream port, then downstream devices can be charged, but the upstream-facing port cannot receive power from the adapter
Solution Approach 1:
The patent introduces multiple power switches as intermediary components between the adapter and different USB ports. These switches act as mediators that can selectively connect or disconnect power flow paths. When charge-through mode is activated, the second power switch serves as an intermediary to route power from the downstream port through the hub to the upstream-facing port, enabling the upstream port to receive power even when the adapter is connected downstream.
3Adaptability or versatility
If multiple power switches and converters are added to enable flexible power routing, then both upstream and downstream ports can support charging simultaneously, but the device complexity increases
Solution Approach 1:
The patent designs the power switches and power converter to serve multiple functions. The first power switch handles both power reception from the upstream port and power transmission to downstream ports. The second power switch similarly manages power flow in both directions. The power converter can convert power from either upstream or downstream connections to the appropriate voltage levels for charging devices at any port. This multi-functionality reduces the need for separate dedicated components for each function.
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
Enables the USB hub to efficiently transmit power from a power adapter to multiple devices connected to downstream ports, including those with charge-through functions, while also supporting data transmission, effectively addressing the limitation of prior art by allowing simultaneous charging and data transfer.
Implementation Method 1
The first power converter includes an input coupled to the second end of the first power switch
Data Source
AI summary
A USB hub and an operating method thereof are provided. The USB hub includes a first USB connector coupled to a first device, a second USB connector coupled to a second device, a first power switch, a second power switch, a power converter, and a third power switch. The first power switch has a first end coupled to a power pin of the first USB connector. The second power switch has a first end coupled to a second end of the first power switch, and a second end coupled to a power pin of the second USB connector. The power converter has an input coupled to the second end of the first power switch. The third power switch has a first end coupled to an output of the power converter, where a second end of the third power switch is coupled to the power pin of the second USB connector.