USB type-c power protection circuit
JP2026009526APending Publication Date: 2026-01-21JRC MOBILITY CO LTD
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Patent Information
- Application Number
- JP2024109454
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2026-01-21
AI Technical Summary
Technical Problem
Existing USB Type-C power protection circuits require complex and costly ICs for determining USB host or device connections, necessitating advanced communication methods like I2C, which increases costs.
Method used
A power supply protection circuit for USB Type-C terminals using a low active load switch connected to the CC pin, a pull-down resistor, and a control unit to manage voltage output based on connection type, eliminating the need for CPU control.
Benefits of technology
The circuit effectively protects devices by preventing voltage supply to USB hosts while allowing supply to USB devices, achieving protection with a simple configuration and reducing costs.
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Smart Images
Figure 2026009526000001_ABST
Abstract
To protect an apparatus having a type-C USB terminal with a simple configuration.SOLUTION: A USB Type-C power protection circuit 1 includes a low active load switch 2 whose input-side (EN) is connected to a CC pin of a Type-C USB port T1 and whose output-side (OUT) is connected to a VBUS of the USB port T1, and the load switch 2 outputs a predetermined voltage to the VBUS side when a USB apparatus is connected to the USB port T1 and outputs a zero voltage to the VBUS side when a USB host is connected to the USB port T1.SELECTED DRAWING: Figure 1
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