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

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) www.protekdevices.com

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 www.protekdevices.com

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 www.protekdevices.com

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

How Does a TVS Diode Work? The positive transient is clamped by the TVS. www.protekdevices.com

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 www.protekdevices.com

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 .1 1 10 100 1,000 Td – Pulse Duration - µs www.protekdevices.com

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 100pF @ 1 MHz 825pF Capacitance 9.8V @ 1-2A >15.5V Clamping Voltage 6V @ 1mA 7.6V Min. Breakdown Voltage 5V 5.6V Working Voltage www.protekdevices.com

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 www.protekdevices.com

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 www.protekdevices.com

Coordinated Protection I/O Ports – Transients Power Bus – Transients Ground – Ground Bounce Shielding – EMF/RFI www.protekdevices.com

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) www.protekdevices.com

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 www.protekdevices.com

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 www.protekdevices.com

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 www.protekdevices.com

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 www.protekdevices.com

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 www.protekdevices.com

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 EN61000-4-2 EN61000-4-5 EN61000-4-4 GR 1089-2nd IEC 61000-4-2 www.protekdevices.com

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

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

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 www.protekdevices.com

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

DSL MODEM protection circuit PTC www.protekdevices.com

Data DSL Modem Secondary lightning and ESD Protection Preferable devices: Vertical TVS PP3100SB, EB PP2300SB, EB www.protekdevices.com

USB 2.0 and Firewire Applications Differential ESD Protection Preferable devices: PSR05, Flipchip array GBLC03C www.protekdevices.com

Shipboard AC Power Recommended TVS Components: 60/90KS200C & PHP120 330 Ohm 500 Microhenry Recommended TVS Components: 60/90KS200C & PHP120 www.protekdevices.com

Power Application ESD protection Preferable devices: PSOT05C, Flipchip www.protekdevices.com

RS-485 or RS-232 Application Low Capacitance Protector Network Recommended TVS Components: PUSB6B, PSR05, SMDAxxLCC, PSM712 www.protekdevices.com

CAN Bus Application Recommended TVS Components: PUSB6B & PSR05 I/O Port Recommended TVS Components: PUSB6B & PSR05 www.protekdevices.com

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

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 www.protekdevices.com

Microprocessor Application Recommended Device GBLCxx ULC040xFCxxC PSMSxxC www.protekdevices.com

AC Power Applications The Clamping Voltage Waveform on PAC240 (10kA current, 8/20us per IEC61000-4-5) www.protekdevices.com

DC Motor Application Load Recommended Product GPZ532 GPZ1275 10kW and 30kW + GPZ532 www.protekdevices.com

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 www.protekdevices.com

IC Failure from ESD without TVS www.protekdevices.com

Contact ProTek Quotes & Domestic Sales Customer Service Rick Heinz: heinz@protekdevices.com Steve Bulissa steve@protekdevices.com Customer Service Lana Tassinari: lana@protekdevices.com Amy Parker: amy@protekdevices.com Applications & New Products Ivan Lawson: ivan@protekdevices.com Han Zou: han@protekdevices.com International Sales V.P. Pai: vppai@protekdevices.com Marketing Paulett Greer: greerp@protekdevices.com www.protekdevices.com