USB3.0 interface protection scheme

一、Scheme protection circuit diagram

USB3.0接口保护方案

  

二、Application background

1. Devices using USB3.0 ports;

2. Products with low main chip voltage such as notebooks;

3. Industrial control products with high requirements for anti-surge capability;

 

三、Explanation of the plan

1. The power supply adopts OVE2632A1,5V/15pF/DFN1006 packaged high-current low-clamping device;

2. The maximum speed of the signal line of the USB2.0 interface is up to 480M, and it is necessary to use low-capacity components, and choose OVEL532A1, 5V/0.5pF/DFN1006 package to protect high-speed signals;

3. The maximum signal rate of the USB3.0 interface is about 10G, using low-capacity 4 and 1 devices, OVEL608A1 is a high-current device, with a surge resistance of more than 30V, suitable for the USB3.0 interface of security industrial control, OVEL608R1B is a snapback device, It is suitable for notebooks and other products with low withstand voltage of the main chip.