Rui Longyuan Electronics
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Rui Longyuan Electronics
Rui Longyuan Electronics
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Security monitoring products

S-Video composite video circuit protection

Video input / output circuit protection

Design Notes:
Protection application:
Video signals used in super video and composite video formats typically vary between 0.5 and 2.0 Vp-p, with frequencies up to 5 MHz. At this frequency, the capacitance of the suppressor needs to be considered. Signal lines that need to be protected against ESD include single-core wires that transmit luminance and chrominance data for super video and composite video.
Solution description:
As shown in the figure on the left, it is recommended to use discrete multi-layer varistors for protection. Due to the analog nature of the video signal, it is not recommended to use a unipolar transient suppression diode array, as this may cut off the negative polarity part of the video signal.

Supporting solutions:
In addition to the recommendations above, Ruilon's MLV portfolio offers other solutions. For example, if the manufacturing process cannot handle 0402 size components, a 0603 size device with equivalent properties can be selected.
Regulatory issues: IEC 61000-4-2 is the standard specification best suited for this interface. This test proves that the end product is not vulnerable to ESD.
Characteristics: Not applicable.
Application Warning: The F-type connector shown on the left is designed for display set-top box video circuits. If this type F connector is used for cable or satellite TV input, then you should pay attention to lightning surges, and you cannot use multi-layer varistors (MLVs). In this case, a gas discharge tube is required. For more information, check out the cable and satellite TV input pages.