By LEIDITECH | 04 July 2024 | 0 Comments
The fragile nerves guarding the electronic world：Revealing the Art of Static and Surge Protection fo
In this highly digitized era，Electronic devices are everywhere，They not only changed our way of life, but also，It has also driven the rapid development of technology。however，The precision and complexity of electronic devices also make them exceptionally sensitive，Especially when facing electrostatic discharge（ESD）When dealing with two common electrical threats, surge。An unintentional static discharge or sudden voltage fluctuation，It is enough to cause device dysfunction or even permanent damage。therefore，Static electricity and surge protection have become an indispensable part of electronic product design，It is related to the reliability and service life of the equipment。
In this article，Lei Mao provides a series of widely used in different fieldsantennaStatic and surge protection schemes for data interfaces。
21.1 RFAntenna static surge protection scheme
Advantages of the plan：Used for electrostatic protection of antenna interfaces，Ultra low capacitance，Can ensure signal transmission。
Contact discharge 30kV，Air discharge 30kV。If it is necessary to meetIEC61000-4-5 surge tests set up at the front endGDTdevice
22.1WIFIAntenna static surge protection scheme
Advantages of the plan：Used to meetWIFIElectrostatic protection of antenna interfaces，Ultra low capacitance，Can ensure signal transmission。
Contact discharge 30kV，Air discharge 30kV。If it is necessary to meetIEC61000-4-5 surge tests set up at the front endGDTdevice
22.2 NB-IoTAntenna static surge protection scheme
Advantages of the plan：Used to meetNB-IoTStatic surge protection of antenna interface，Ultra low capacitance，Can ensure signal integrity。Lei Mao based onNB-IOT Module voltage selection 3.3VLow junction capacitancediodeULC3311CDN, Or 5V Low junction capacitanceESD二极管ULC0511CDN30，satisfyIEC61000-4-2（Level 4）。If it is necessary to meetIEC61000-4-5 surge tests set up at the front endGDTdevice,SelectionSMD4532-090NFOr 2R090-5Setc.。
23.1mobile phoneUSB VBATSurge protection scheme
Advantages of the plan：This plan adopts Level 2 protection for Lei Mao,Save space，Provide front-end protection for surge devices,Suitable for Southeast India Submarket。Post stage adoptionDFN1006-3-way anti-static device，satisfyIEC61000-4-2，Contact discharge 8kV，Air discharge 15kV。
24.1I2C Interface isolation and electrostatic protection scheme
25.1SPI Interface isolation and electrostatic protection scheme
26.1JTAGInterface electrostatic protection scheme 5V
commonlyFPGA/ARMThe program download interfaces used are allJTAGinterface。JTAGInterface is a commonly used type of download The interface of the program，And it is also a type of interface that is often plugged and unplugged with electricity，And live plugging and unplugging will inevitably produce some Static or surge current，Therefore, if some protective measures are not taken，Extremely susceptible toESDBreakdown due to electrostatic radiationJTAG Related pins，Even damagingCPUInternal core circuit，Thus causing permanent damage to internal circuits。
Advantages of the plan：Lei Mao adopts integrated device protection，While ensuring signal integrity，adoptElectrostatic testing。full foot：IEC61000-4-2，Contact discharge 30kV，Air discharge 30kV。
26.2JTAGInterface electrostatic protection scheme 3.3V
Advantages of the plan：Lei Mao adopts integrated device protection，While ensuring signal integrity，Through electrostatic testing。full foot：IEC61000-4-2，Contact discharge 30kV，Air discharge 30kV。
27.1FlexRayVehicle network electrostatic protection scheme
FlexRayVehicle network standards have become the benchmark for similar products，It's a follow-upCANandLINSubsequent latest research and development achievements 。FlexRayCan provide faster data rates，More flexible data communication，More comprehensive selection and incorrect operations。 FlexRayCan support various topological structures，achieveCAN20 times the network bandwidth of the bus。（20Mbit/S）Lei Mao Provide multiple protection schemes，To cope with possible static damage or other transient voltages, including small energy of 8/20uSSurge current。
28.1Fingerprint recognition electrostatic protection scheme
The human body is the largest electrostatic carrier，It usually carries a voltage of tens of thousands of volts，The dry season of autumn and winter，Static electricity is more likely to accumulate on the human body，Fingerprint recognition as an inevitable application in contact with humans，Static electricity protection is very important。
Lei Mao adopts single device protection,Save space， Ensure signal integrity，satisfyIEC61000-4- 2，Level 4，Contact discharge 20kV，Air discharge 20kV
29.1CoaxialSurge protection scheme
Advantages of the plan：ForCoaxialSurge protection for coaxial interfaces，Lei Mao adopts secondary protection,Reliable work，
Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。 satisfyIEC61000-4-5 8 /20μs，6KA。
30.1GPS(Global Positioning System)Surge protection scheme
Advantages of the plan：ForGPSinterface，Surge protection for power and RF signals，Lei Mao adopts secondary protection,Reliable work， Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。satisfy IEC61000-4-58 /20μs，5kA 。
31.1CVBSInterface surge protection scheme
Advantages of the plan：ForCVBSInterface lightning surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity。
satisfyIEC61000-4-5、GB/T17626.5 8/20μs 400A，10/1000μs 100A。
32.1LINStatic protection scheme
LIN（LocalInterconnect Network）Bus is a low-cost serial communication network，Used to implement distributed electronic system control in automobiles。LINThe bus is for the controller area network(CAN)A supplement to other automotive multi-channel networks，Applicable to the bandwidth of the network、Applications with low performance or fault tolerance requirements。LINThe bus is based onSCI(UART)data format，Adopting a single master controller/Multi slave device mode，yesUARTA special case in。
Advantages of the plan：Lei Mao adopts integrated device protection，capacitance<20PF，While ensuring signal integrity，Through electrostatic testing。satisfy：satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 25kV。
33.1NFCInterface electrostatic protection scheme
Lei Mao ElectronicsleiditechDevices forULC1811CDN Meet 18VLow capacity parameter requirements for，furthermoreVCLow clamping voltage，Can be securely protectedNFCLong term reliability of interface antennas。
34.1VIDEOStatic surge protection scheme
Advantages of the plan：Lei Mao adopts two levels of protection，Reliable work，Ensure signal integrity，Transmission frequency 10M。
prompt：current＞1ATake the inductance for decoupling，current＜1ATime usePPTCBetter effect。
satisfy：IEC61000-4-2，Level 4，Contact discharge 8KV，Air discharge 15KV；IEC6100-4-510/700μs 6KV
35.1RJ11 Surge protection scheme
Advantages of the plan：Lei Mao adopts two levels of protection，Reliable work，Ensure signal integrity，Transmission frequency 56KHZ。
satisfy：IEC61000-4-2，Level 4，Contact discharge 8KV，Air discharge 15KV；IEC6100-4-510/700μs 6KV。
prompt：current＜1ATime usePPTCBetter effect，current＞1ATake the inductance for decoupling。
36.1TTLStatic protection scheme
Advantages of the plan：Lei Mao adopts single device protection,Small packaging，Save space， Ensure signal integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。
37.1HD-SDIReal time high-definition protection scheme
Advantages of this plan：HD-SDI As a real-time high-definition technology，The application scope is becoming increasingly broad，We must attach great importance to the protection of its receiving and sending ends。Lei Mao Electronic Needle provides the following protection scheme for this interface。
characteristic：Transmission frequency 1.485G-2.97GHZ。
satisfy：IEC61000-4-5 10/700US 6KV，1.2/50US&8/20US6KV/3KA
IEC61000-4-2 Contact discharge 8kV，Air discharge 15kV
Lei Mao has a detailed plan and wiring diagram，And recommended model parameters。Please contact Lei MaoEMCLittle brother requests it。
Lei Mao mainly provides anti-static measuresTVS/ESDAnd relatedEMCcomponent（Discharge tubeTSS/GDT、Stabilizing tubeZENER、VaristorMOV、Rectifier diodeRECTIFIER、Self recovery fusePPTC、Field-effect transistorMOSFET、inductance）。
Surrounded by Lei MaoEMCEMC service customers，Self built free laboratory for testing static electricity for customersESD（30KV）、Group pulseEFT(4KV)、surge（8/20，10/700 10/1000）、Car load shedding（7637 5a/5b）Performance testing of components, etc。LeiditechKeeping up with the pulse of domestic and international technological updates，Continuously innovatingEMCProtection scheme and related devices，Target direction is small packaging，High power，Provide reliable solutions and components for domestic substitution。
Surge protection scheme for charging piles—The key to ensuring the safe and stable operation of char
The fragile nerves guarding the electronic world：Revealing the Art of Static and Surge Protection fo
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