1. Introduction to TVS Overvoltage Protection Devices

2. 2 Version01_100407 Outline  Overvoltage Protection –The race is on –Clamp vs Crowbar  Key Parameters –Unidirectional vs Bidirectional –Peak Pulse Power PPPM –Double Exponential Waveforms –Reverse Stand-Off Voltage VR –Breakdown Voltage VBR –Clampin Voltage VC –Peak Pulse Current IPP  Product Families –Part Number Conventions –Axial Leaded  P4KE, SA, SAC, P6KE  1.5KE, LCE  3KP, 5KP, SLD  15KPA, 20KPA, 30KPA  AK6, AK10 –Surface Mount  SMAJ, P4SMA, SACB  SMBJ, P6SMB, 1KSMB  SMCJ, 1.5SMC  SMDJ, 5.0SMDJ

3. 3 Version01_100407 The Race is On! Overvoltage Protector Protected Circuit Overvoltage Event

4. 4 Version01_100407 V line Trigger Voltage Delatch Crowbar Devices V line Transient EventV line Clamping Devices Clamp Voltage Clamping Devices vs Crowbar Devices

5. 5 Version01_100407 Outline  Overvoltage Protection –The race is on –Clamp vs Crowbar  Key Parameters –Unidirectional vs Bidirectional –Peak Pulse Power PPPM –Double Exponential Waveforms –Reverse Stand-Off Voltage VR –Breakdown Voltage VBR –Clamping Voltage VC –Peak Pulse Current IPP  Product Families –Part Number Conventions –Axial Leaded  P4KE, SA, SAC, P6KE  1.5KE, LCE  3KP, 5KP, SLD  15KPA, 20KPA, 30KPA  AK6, AK10 –Surface Mount  SMAJ, P4SMA, SACB  SMBJ, P6SMB, 1KSMB  SMCJ, 1.5SMC  SMDJ, 5.0SMDJ

6. 6 Version01_100407 Key Parameters: Peak Pulse Power

7. 7 Version01_100407 Key Parameters: Peak Pulse Power  Double Exponential Waveforms –Simulate induced lightning events –Rise time & decay time in microseconds 10 x 1000 8 x 20

8. 8 Version01_100407 Bidirectional vs Unidirectional Bidirectional TVSUnidirectional TVS Voltage – Current (V-I) Curve Voltage is displayed left to right Current is displayed up and down

9. 9 Version01_100407 +I +V -V -I I PP ITIT VRVR V BR VCVC IRIR Key Parameters: V R Reverse Standoff Voltage

10. 10 Version01_100407 +I +V -V -I I PP ITIT VRVR V BR VCVC IRIR Key Parameters: V BR Breakdown Voltage

11. 11 Version01_100407 +I +V -V -I I PP ITIT VRVR V BR VCVC IRIR Key Parameters: V C Max Clamping Voltage

12. 12 Version01_100407 Key Parameters: I pp +I +V -V -I I PP ITIT VRVR V BR VCVC IRIR Peak Pulse Current

13. 13 Version01_100407

14. 14 Version01_100407 Question 1: True or False  A TVS Diode is intended to provide continuous voltage regulation to a circuit. FALSE

15. 15 Version01_100407 Question 2: True or False  A TVS Diode is a crowbar type of device that brings the protected line close to ground potential. FALSE

16. 16 Version01_100407 Question 3: True or False  The continuous power rating of a TVS Diode can be found by multiplying the peak allowable pulse current by the clamping voltage. FALSE

17. 17 Version01_100407 Question 4: True or False  A bidirectional TVS Diode can be used on a DC line. TRUE

18. 18 Version01_100407 Question 5: True or False  A Unidirectional TVS Diode is symmetrical and has the same clamp voltage regardless of the direction of current flow through the part. FALSE

19. 19 Version01_100407 Outline  Overvoltage Protection –The race is on –Clamp vs Crowbar  Key Parameters –Unidirectional vs Bidirectional –Peak Pulse Power PPPM –Double Exponential Waveforms –Reverse Stand-Off Voltage VR –Breakdown Voltage VBR –Clamping Voltage VC –Peak Pulse Current IPP  Product Families –Part Number Conventions –Axial Leaded –P4KE, SA, SAC, P6KE –1.5KE, LCE –3KP, 5KP, SLD –15KPA, 20KPA, 30KPA –AK6, AK10 –Surface Mount –SMAJ, P4SMA, SACB –SMBJ, P6SMB, 1KSMB –SMCJ, 1.5SMC –SMDJ, 5.0SMDJ

20. 20 Version01_100407 Part Numbering Conventions The first portion: Indicates the Peak Pulse Power or the package or both. The next portion: Indicates either the V R or the nominal V BR Both voltage conventions are industry standards. Offering both conventions is a critical driver for sales.

21. 21 Version01_100407 Part Numbering Conventions  V R – Based Part Numbers –Axial Leaded  SA, SAC, LCE  3KP, 5KP, SLD  15KPA, 20KPA, 30KPA  AK6, AK10 –Surface Mount  SMAJ, SACB  SMBJ, SMCJ,  SMDJ, 5.0SMDJ  V BR – Based Part Numbers –Axial Leaded  P4KE, P6KE  1.5KE, –Surface Mount  P4SMA,  P6SMB, 1KSMB  1.5SMC

22. 22 Version01_100407 Axial Leaded TVS Diodes Available Axial Packages DO-41DO-15DO-201P-600 AK-6AK-10

23. 23 Version01_100407 DO-41 Axial TVS Diodes  P4KE (400W)

24. 24 Version01_100407 DO-15 Axial TVS Diodes  P6KE (600W)  SA (500W)  SAC (500W, Low Cap) TVS Diode Isolation Diode

25. 25 Version01_100407 DO-201 Axial TVS Diodes  1.5KE (1500W)  LCE (1500W, Low Cap)

26. 26 Version01_100407 P-600 Axial TVS Diodes  3KP (3000W)  5KP (5000W)  15KPA (15000W)  20KPA (20000W)  30KPA (30000W)  SLD (2200W - 100x150000 uS Waveform)

27. 27 Version01_100407 AK Series TVS Diodes  AK6 (6000A – 8x20 uS Waveform)  AK10 (10000A – 8x20 uS Waveform)

28. 28 Version01_100407 Surface Mount TVS Diodes Available Surface Mount Packages DO-214AC (SMA J-Bend) DO-214AA (SMB J-Bend) DO-214AB (SMC J-Bend)

29. 29 Version01_100407 SMA Surface Mount TVS Diodes  SMAJ (400W)  P4SMA (400W)

30. 30 Version01_100407 SMB Surface Mount TVS Diodes  SMBJ (600W)  P6SMB (600W)  SACB (500W, Low Cap)  1KSMB (1000W)

31. 31 Version01_100407 SMC Surface Mount TVS Diodes  SMCJ (1500W)  1.5SMC (1500W)  SMDJ (3000W)  5.0SMDJ (5000W)

32. 32 Version01_100407 Axial TVS Diode Summary

33. 33 Version01_100407 Surface Mount TVS Diode Summary

34. 34 Version01_100407

35. 35 Version01_100407 Question 1: True or False  The leakage current of a TVS Diode is measured at its breakdown voltage. FALSE

36. 36 Version01_100407 Question 2: True or False  If the same pulse current is allowed to flow through both a low power and a high power TVS Diode, the clamping voltage will be lower on the high power device. TRUE

37. 37 Version01_100407 Question 3: True or False  If a narrow 20µS current pulse is allowed to flow through a TVS Diode, the allowable power level can be higher than the 10x1000µS power level indicated on the data sheet. TRUE

38. 38 Version01_100407 Question 4: True or False  The AK series of TVS Diodes can handle a million watts of power during a transient event. TRUE

39. 39 Version01_100407 Question 5: True or False  TVS Diode part numbers always refer to the actual breakdown voltage of the device. FALSE

40. 40 Version01_100407 Thank You! Introduction to TVS Overvoltage Protection Devices