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TVS COMPONENT FUNDAMENTALS

Published byMarcia Hopkins Modified over 8 years ago

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Presentation on theme: "TVS COMPONENT FUNDAMENTALS"— Presentation transcript:

1 TVS COMPONENT FUNDAMENTALS
The What, How, Why & Where of Protection

2 What is a TVS Component? Acronym for Transient Voltage Suppressor
A.K.A.: Surge Protective Device Component (SPDC) Available Technologies Avalanche Breakdown Diode (ABD) A.K.A.: TVS Diode Metal Oxide Varistor (MOV) Steering Diodes (SD) Thyristor Surge Suppressor (TSS) Gas Discharge Tube (GDT)

3 What is a TVS Component? TVS Components Industry Designation
Gas Discharge Tube Metal Oxide Varistor Avalanche Breakdown Diode Thyristor Surge Suppressor Steering Diode Industry Designation GDT MOV ABD TSS SD Application Telecom/ Data Line Secondary AC Power Line Board Level/ Data & DC Pwr Telecom/ Power Cross High Speed I/O Port

4 How does a TVS Component Work?
TVS Devices Do: Clamp Transient Voltages Divert Transient Currents Protect Between Line-to-Line & Line-to-Ground TVS Devices DO NOT: Interfere with Signal Integrity Cause Excessive Insertion Loss Conduct Excessive Leakage Current

5 How Does a TVS Diode Work?
Similar to a Zener Diode with a larger junction area characterized for voltage suppression Unidirectional and Bidirectional Configurations

6 How Does a TVS Diode Work?
The positive transient is clamped by the TVS.

7 Disadvantages of Other Technologies
Polymer Suppressors High Clamping Voltage, Fails Short & Wear Out Zener Diodes Limited Peak Pulse Current Capability On-Chip Protection Networks Limited Peak Pulse Current Capability & High Clamping Voltage

8 IPP – Peak Pulse Current - Amps
Comparison Chart 100,000 GDT 10,000 MOV / TSS IPP – Peak Pulse Current - Amps 1,000 100 ABD / MLV / SD 10 ,000 Td – Pulse Duration - µs

9 Comparison of MLV and TVS F.C.
ProTek 5 Volt Flip Chip P0402FC05C Competitor 5 Volt Part VC060305A150 Comparison 1 < 0.7nH < 1.0nH Inductance 1 MHz 825pF Capacitance 1-2A >15.5V Clamping Voltage 1mA 7.6V Min. Breakdown Voltage 5V 5.6V Working Voltage

10 Why Use TVS Components? Industry Standard Requirements Field Failures
ESD, EFT, Lightning – ENxxxxx or IEC Standards Field Failures Cost of Compliance Secondary Lightning Effects Smaller IC Components Higher Pin Density ICs Due to miniaturization pins are closer together

11 Where are TVS Components Used?
Protection is Required at All Levels Printed Circuit Board (PCB) Equipment Systems (Buildings) Examples: Modems, DSL Router Interfaces Ethernet I/O Ports USB, FireWire Ports AC Power Lines Power Bus Ports Keyboards, Ear Pieces & Antennas

12 Coordinated Protection
I/O Ports – Transients Power Bus – Transients Ground – Ground Bounce Shielding – EMF/RFI

13 Key Parameters for TVS Ip: Peak current for certain surge waveform
Vbr : Breakdown voltage, larger than operating voltage Vwm Vcmax: Maximum clamping voltage Ip) Cj: Capacitance(operating frequency) Ir: Leakage current operating voltage Vwm)

14 Key Interface Locations
Application AC Power DC Power Bus Telephone Data Lines (Signal) Video 587BxxxLP PACxxx 30KPAxx TEL185E 485ELC CX12ELC PIP120 15KPAxx PLC01-6 SMLCxxC PLC03-6 15KPAxxC PSDxx PPxxxxSC,SB ULC0402FCxxC ET724 GBLCxxC SRV05-4

15 Computer I/O Ports Application Circuit ProTek Devices USB, DATA Lines
RS-485 FireWire (IEEE 1394) DC Power Bus Circuit I/O Port Hand-Held Computer Network Interface Internal Power Supply ProTek Devices PSR05 or SRV05-4 SMDAxxLCC PSM712 GBLCxxC PSD or P0402FCxxC

16 Telecom Central Office Applications
High Speed Modem Telecom Interface Card Intrabuilding Telecom Circuit T1/E1, I/O Port T1-to-Ethernet T1 Protection ProTek Devices PP3100SB/SC & PLC03-3.3 GBLCxxC PSOTxxC SMLCxxC-2 PLC01-6

17 Cellular Phones Application Circuit ProTek Devices Ear/Microphone
SIM Card Edge Connector LCD Module Antenna Circuit Voice Processor Data Port Video RF ProTek Devices SFT701 & EMIF2-xxFCC GBLCxxC & PSLCxxC GBLCxxC, SFC05-4 & SFC05-5 EMIF6-100LFC SLVU2.8-4 & EMIF10Q-200 GBLCxxC

18 Military Applications
Communication Ckts DC Power Supply Shipboard AC Power Data Comm Lines Circuit CAN Bus 28V dc Bus 120V ac Bus RS-485 ProTek Devices PLC03-6, PUSB6B, PSR05 704-15K36/36T PHP/PIP120 DLZxxCA 485ELC

19 Design Specific Devices
ProTek Devices SMLC6.5C-2 P0402FC05C PLC01-6 PLC03-6 PP0901SA PSR05 PP3100SC GBLCxxC STF701 ULC0402FC05C Application T1/E1 Access Wireless Phone Long-haul Line Short-haul Line Soft Modem ISDN S/T Modem Ethernet PDB Cell Phone Threat GR 1089 EN EN EN GR nd IEC

20 Video Applications Recommended Devices: 1. SRV05-4 2. ET724, ET721
3.EMIFxx-xxx Series

21 Video Circuit Application
Recommended TVS Components: PLCDA05C-6 Optional Devices: GBLC03C & SLVDA2.8LC

22 Audio Applications Recommended Devices 1. TVS/EMI filter EMIFxx-xxx
Speaker Recommended Devices 1. TVS/EMI filter EMIFxx-xxx 2. FC TVS diode array Microphone

23 Gigabit Ethernet Application
Recommended Products Lightning protection: PLC03-3.3, -6 Differential ESD Protection Vertical TVS SLVU2.8-4, -8 SLVDA2.8LC

24 DSL MODEM protection circuit
PTC

25 Data DSL Modem Secondary lightning and ESD Protection
Preferable devices: Vertical TVS PP3100SB, EB PP2300SB, EB

26 USB 2.0 and Firewire Applications
Differential ESD Protection Preferable devices: PSR05, Flipchip array GBLC03C

27 Shipboard AC Power Recommended TVS Components: 60/90KS200C & PHP120
330 Ohm 500 Microhenry Recommended TVS Components: 60/90KS200C & PHP120

28 Power Application ESD protection Preferable devices: PSOT05C, Flipchip

29 RS-485 or RS-232 Application Low Capacitance Protector Network
Recommended TVS Components: PUSB6B, PSR05, SMDAxxLCC, PSM712

30 CAN Bus Application Recommended TVS Components: PUSB6B & PSR05 I/O
Port Recommended TVS Components: PUSB6B & PSR05

31 Ethernet Applications
10/100 Base T Recommended TVS Components D1 PLC03-3.3, D2, & D3: GBLC03C, SLVDA2.8LC & PLCDAxxC Optional Devices: IO6LC & USB004

32 Medical Applications LCD Display EMIFxx-xxx Series
Pump SMDAxx Series SLVU2.8 Sensors PSOTxx Series Implanted Devices GBLCxxC SLVU2.8 ULC040xFCxxC SMDAxx EMIFxx-xxx GBLCxxC SLVU2.8 PSOTxx

33 Microprocessor Application
Recommended Device GBLCxx ULC040xFCxxC PSMSxxC

34 AC Power Applications The Clamping Voltage Waveform on PAC240
(10kA current, 8/20us per IEC )

35 DC Motor Application Load Recommended Product GPZ532 GPZ1275
10kW and 30kW + GPZ532

36 Steps to Cost-Effective Protection
Determine Environmental Threat Source Lightning, Switching, ESD, EFT, EMI/RFI Identify Probable Entry Point(s) System, Equipment, Card Edge or IC Component Estimate Transient Threat Level Transient Current, Duration & Industry Standard Select TVS Component or Device Match TVS Parameters to Threat & Circuit Requirements Design Circuit and/or PCB Layout Low Impedance Return Path (Ground) Verify Circuit Performance For Functionality, Conformance & Compliance

37 IC Failure from ESD without TVS

38 Contact ProTek Quotes & Domestic Sales Customer Service
Rick Heinz: Steve Bulissa Customer Service Lana Tassinari: Amy Parker: Applications & New Products Ivan Lawson: Han Zou: International Sales V.P. Pai: Marketing Paulett Greer:

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