TECH BRIEF ES D P ro t e c t io n Vid e o In p u t a n d Ou t p u t Lin e s Ba c k g ro u n d current loads, (such as the flyback transformer) pump lasers or other harsh environments. The EFT can be introduced via the power supply or protection: ? Computer (laptop / desk top) ? Graphic card Electronic systems are sensitive to both external and internal sources of overvoltage transients. This can be in the form of external Electro- Static Discharge (ESD) or internally generated Electrical Fast Transients (EFT). The purpose of this applica- tion brief is to detail Video port protection. ? Set-top box inductively coupled onto a signal ? Video game console (Xbox, line. Regardless of the method of introduction, the results may be soft or hard failures similar to ESD failures. Playstation 2) Circ u it Ex a m p le s Solut ion 1 Th e S o lu t io n To protect a standard composite In order to provide the IC with video port used in computer protection against ESD and EFT systems (NSTC or PAL), a single transients, the use of suppression channel protection device is recom- Th e P ro b le m Externally generated ESD pulses are introduced into the Video por t and travel through the connector onto the system board. Once on the board, they will propagate down the signallines toward the integrated circuits(IC). Most ICs are designed with 2000 volts of internal ESD products is recommended. The mended. A low capacitance 0402 suppre