High-Definition Multimedia Interface (HDMI) is a high-definition multimedia interface, which is a digital video/audio interface technology. It is a dedicated digital interface suitable for video transmission. It can transmit audio and video signals at the same time. The maximum data transmission speed is 48Gbps.

HDMI can be used in set-top boxes, DVD players, personal computers, video games, integrated amplifiers, digital audio and televisions.HDMI can transmit audio and video signals at the same time. The HDMI interface needs to be plugged and unplugged frequently, so the probability of static electricity is high. SOCAY has specially designed an HDMI protection solution based on TVS tube for HDMI interface characteristics:

Background

1. HDMI needs to support hot plugging

2. HDMI transmission rate is higher

3. The HDMI chip is fragile and easy to be damaged by static electricity

SOCAY Solution and Electronic Components

Transient Voltage Suppression Diode(TVS Diode )

TVS1【ULC0524P】Vrwm：5.0V；Vb：6.0V；Vesd：8KV/15KV；Ct（f=1MHz）：0.8pF；Package: DSON-10

TVS1【ULC3304P10】Vrwm：3.3V；Vb：4.0V；Vesd：30KV/30KV；Ct（f=1MHz）：0.5pF；Package: DFN2510P10

TVS2【SR05-4A】Vrwm：5.0V；Vb：6.0V；Vesd：8KV/15KV；Ct（f=1MHz）：1.0pF；Package: STO-26

Applications

1. Laptop, PAD, home desktop computer, industrial computer

2. Network printer

3. Set-top box

4. Mobile handheld devices

5. TV

6. Vehicle

7. Other devices with HDMI ports

8. DVD recorder

The Solution Notes

1. In HDMI data line and other transmission lines, TVS diodes is used to protect the ground and clamp the electrostatic voltage

2. The junction capacitance of the TVS is less than 0.8pF, and the signal can be completely transmitted at the highest transmission rate of HDMI

3. The TVS package is DSON-10, which is small in size, saves PCB space, and is convenient for engineers to design