Yint Offers Analog Video Interfaces Protection

PublishTime： 2023-10-24 Article Source：Yint News

1. BNC Video Interface Protection

2. DVI Interface Protection

3. TV side panel

Fig.1

YINT offers Analog Video Interfaces Protection.

I.BNC Video Interface Lightning Protection

Common mode diode protection (referring to the protection of equipment within 50 meters of the video coaxial cable from high-voltage lines or conductive media susceptible to direct lightning strikes)

Fig.2

Table.1

1. GDT is Intex's ceramic gas discharge tube, which provides common-mode protection to ensure the protection of the front end against instantaneous high voltage. It can handle the high surge voltage to about 90V, which is beneficial to the second processing.

Optional plug-in: 2RX090L-8, which has an action speed of P seconds, action voltage: 72V~108V, and the inter-stage capacitance is less than 1PF (at 1MHZ)

Optional chip: SMD1812-091, which has an action speed of P seconds and an action voltage of 63V~117V, the inter-stage capacitance is less than 1PF (under 1MHZ).

2. PPTC refers to the self-restoring fuse provided by Yint Electronics. It can effectively prevent the induced current caused by lightning strikes or the current abnormality caused by the interface plugging process, and isolate and protect the back end. After the current abnormality ends, the self-restoring fuse will Return to normal work. The important point is that it can coordinate the action time of the first-stage gas discharge tube and the second-stage TVS, also known as coupling protection.

The general selection is SMD1206-012L (60V 125mA Case: 1206 patch). Its internal resistance range is 1.5~3.6Ω. If there is a special video driver chip, the influence of internal resistance must be considered.

3. Thristor is a fine protection. It completes the secondary processing of the surge that has not been processed by the previous stage so that the residual surge voltage is small enough to protect related circuits such as video decoding.

Device selection: INT.P0080SB-L low residual voltage type

II.DVI Interface Protection

Yint provides ESD protection devices, both discrete and integrated, which can be easily laid out to protect DVI interfaces on common video product equipment. Such as YC input, YPbPr, audio L/R, RGB, etc. For the A/V interface, Yint recommends the comprehensive solution ESDSRLC05-4 or ESD0524P.

Fig.3

Table.2

III.TV Side Panel

For designing VGA input interface PC video output, DVD, set-top box, and other video equipment, these integrated devices.

The software combines ESD protection and synchronization signal buffering features, our recommendation is ESDSRLC05-4 or ESD5V0D8.

Fig.4

Table.3

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