USB type-c interface ESD protection TVS diode
USB Type-C interface electrostatic discharge protection circuit diagram and ESD/TVS diode model parameters
Selection of TVS Diodes for ESD Surge Protection of UAV USB Type-C Port- 哔哩哔哩
The Type-C interface introduces the precautions for the design of ESD protection devices
Type-C interface is a brand-new USB interface form, which is widely used in USB 3.X and USB 4.0. The Type-C interface has many advantages, for example, when charging, it does not distinguish between positive and negative, and can be plugged in casually; when charging, the maximum current allowed to pass is larger. At present , in addition to charging, the Type-C interface on the mobile phone can also transfer data to and from the computer , and act as an audio input and output interface through a conversion cable. Type-C has rich interface resources, which can meet the needs of our various application scenarios.
USB Type-C receptacle end view
USB Type-C terminal view
Jingyang Electronics New Product TT0241SA-Fx
For USB 3.X and USB 4.0 high-speed interfaces , the following points should be considered when selecting ESD /EOS protection components:
1. In order to ensure the integrity of high-speed signals transmitted through USB 3.X and USB 4.0, ESD protection devices with lower capacitance should be used when selecting this device .
2. It has a high ESD withstand voltage capability, at least to withstand the ESD impact of 8kV contact discharge specified in IEC 61000-4-2.
3. It has a lower clamping voltage, which means better protection performance.
In order to meet the above requirements, Jingyang Electronics launched its product TT0241SA-Fx (for TX, RX protection) for USB 3.X and USB 4.0 with smaller capacitance and lower clamping voltage.
Notes on LAYOUT design:
1. Place the ESD protection device as close as possible to the I/O connector to reduce the ESD ground path and improve protection performance.
2. In USB 3.X and USB 4.0 applications, the ESD protection device should be placed between the AC coupling capacitor on the TX differential channel and the I/O connector, so that no DC current can flow through the ESD protection device, thereby preventing any potential latch-up hazard.
3. Use curved traces whenever possible to avoid unwanted reflections
4. Keep the trace lengths between the positive and negative lines of the differential data channel equal to avoid common mode noise generation and impedance mismatch.