Application Note

Description

In high-frequency and high-speed applications, products with higher capacitance values should be avoided, as low capacitance reactance can cause signal distortion. Low capacitance products should be the first choice for applications. Generally, the capacitance value of TVS designed with low capacitance can be divided into three stages. Taking smart phones as an example, Audio, MIC, buttons, etc. belong to general transmission speeds, and the capacitance value does not need to be regulated here; In addition, interfaces such as video (VGA, DVI, S-Video), transmission line (USB2.0, SD Card), and network ports (RJ-45) are mostly required to be below 3pF; For interfaces with high-speed data transmission, especially existing HDMI, Display Port, USB 3.0, Type C, and Antenna, which have significantly improved transmission speeds, it is necessary to use ultra-low capacitance components for applications, generally requiring TVS capacitors below 1pF or lower.
protection gesture

Instructions

USB This is a tooltip 1 of 8 VGA This is a tooltip 2 of 8 DVI This is a tooltip 3 of 8 LAN This is a tooltip 4 of 8 HDMI This is a tooltip 5 of 8 Mini Display This is a tooltip 6 of 8 SIM This is a tooltip 7 of 8 SD This is a tooltip 8 of 8
Applicable series

Application

Type of surge ESD Surge EFT
Application STS STD MLE SEH MLC MLC MLA
Standard IEC61000-4-2 IEC61000-4-5 IEC61000-4-4

Product Description

SFI has developed the STS series of overvoltage protectors dedicated to high-speed transmission. STS is a product using the newly developed SGD packaging method. It successfully encapsulates Wafer in the size of 0201~0603. It provides superior TVS product features and can effectively protect 15KV~25KV overvoltage. It has passed the international standard IEC61000-4-2. STS itself It has low voltage and low capacitance to provide better ESD protection for high-speed transmission such as USB 2.0, HDMI, and Thunderboat. In addition, STD uses SGD packaging to achieve ultra-low capacitance levels, and uses cutting-edge discharge methods to suppress ESD. STS/STD provides "same as RC products" packaging, which can reduce the verification process time, and has "excellent soldering properties". Compared to the drawbacks of using DFN in the market, which has always been difficult to solder and low flux, STS/STD is the best choice for high-speed transmission overvoltage components.

feature comparison

feature comparison

Comparison

SFI

solutions STS Series

1.SMD package (0201~0603).
2.Specially designed for ESD protection of smartphones.
3.Low collapse pressure and high flow capacity.
4.High non-linear index α Reaching (above 99).
5.The response speed is faster than MLV (<0.1ns).
6.Passed IEC61000-4-2 testing.
7.Compliant with RoHS requirements and lead-free tin furnace.
8.Non polar bidirectional action.

Other solutions

MOV(Motel Oxide Varistor)

1.Large size of plug-in packaging (5 Å~14 Å).
2.High suppression voltage.
3.Large leakage current (<50μA).
4.Slow reaction speed (>100ns).
5.Severe deterioration phenomenon.
6.Failure modes may lead to combustion phenomena.

TVS(Transient Voltage Suppresor)

1.SMD DFN package is not easy to solder.
Application line

Application Circuit

USB 2.0 ESD protection

USB 3.0 ESD protection

NFC Antenna ESD protection

HDMI for ESD protection

USB 2.0 ESD protection
USB 3.0 ESD protection
NFC Antenna ESD protection
HDMI for ESD protection
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