Analog Video Interfaces Protection
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Analog Video Interfaces Protection

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1

BNC Video Interface Protection

2

DVI Interface Protection

3

TV side panel

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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)

 

info-486-294          info-461-276

 

 

Device model

packaging

Size mm

Junction capacitance.  Typical value

ESD robustness (IEC61000-4-2)

note

2R075L

Dip D=6mm

5.5*6.0

0.8PF

2.5KA /8/20US

Inline gas discharge tube

GDT note: A

GDT/SMD1812-091

4532/1812

4.5*3.2

0.6PF

2KA /8/20US

SMD gas discharge tube

GDT note: A

SMD1206-010

3016/1206

3.0*1.6

IH:100mA

 

Polymeric positive temperature coefficient

INT.P0800SB-L

SMB

4.5*3.2

30PF

80A

discharge tube

 

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 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.

 

II.DVI interface protection

We provide 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, we recommend the comprehensive solution ESDSRLC05-4 or ESD0524P.

 

info-505-314

 

Device model

packaging

Size mm

Junction capacitance.

Typical value

ESD robustness (IEC61000-4-2)

note

ESDSRVLC05-4

SOT-23-6L

2.92*2.82*0.4

0.35 PF

C :+ 12KV

A:+ 17KV

LC

low capacitance

ESD0524P

DNF- 10-2.5- 1.0

2.5*1.0*0.6

0.35 PF

C :+ 10KV

A:+ 15KV

 

 

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.   

 

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Device model

packaging

Size mm

Junction capacitance.

Typical value

ESD robustness (IEC61000-4-2)

note

ESDSRVLC05-4

SOT-23-6L

2.92*2.82*0.4

0.35 PF

C :+ 12KV

A:+ 17KV

LC

low capacitance

ESD5V0D8

SOD-882

1.0*0.6*0.5

0.35 PF

C :+ 10KV

A:+ 10KV

SOD-882

 

 

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