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Introduction to SIDACtor ® Overvoltage Protection Devices.

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Presentation on theme: "Introduction to SIDACtor ® Overvoltage Protection Devices."— Presentation transcript:

1 Introduction to SIDACtor ® Overvoltage Protection Devices

2 2 Version01_ Outline Overvoltage Protection –The race is on –Clamp vs Crowbar Key Parameters –Vdrm –Vbo –Vs –Holding Current –Surge Current Withstand Double Exponential Waveforms Power Cross Considerations Protected Circuit Issues –Let-through voltage –Turn-on time –Capacitance Vbo Dependence Applied voltage dependence Surge Capability dependence Configurations –Single Devices –SLIC Devices –2-Chip Devices –3-chip Y Devices Package Options Selection Process

3 3 Version01_ The Race is On! Overvoltage Protector Protected Circuit Overvoltage Event

4 4 Version01_ V line Trigger Voltage Delatch Crowbar Devices V line Transient EventV line Clamping Devices Clamp Voltage Clamping Devices vs Crowbar Devices

5 5 Version01_ Outline Overvoltage Protection –The race is on –Clamp vs Crowbar Key Parameters –Vdrm –Vbo –Vs –Holding Current –Surge Current Withstand Double Exponential Waveforms Power Cross Considerations Protected Circuit Issues –Let-through voltage –Turn-on time –Capacitance Vbo Dependence Applied voltage dependence Surge Capability dependence Configurations –Single Devices –SLIC Devices –2-Chip Devices –3-chip Y Devices Package Options Selection Process

6 6 Version01_ Key Parameters Voltage – Current (V-I) Curve Voltage is displayed left to right Current is displayed up and down

7 7 Version01_ Key Parameters: V DRM +I +V -V -I ITIT ISIS IHIH I DRM VTVT V DRM V BO VSVS

8 8 Version01_ Key Parameters: V BO +I +V -V -I ITIT ISIS IHIH I DRM VTVT V DRM V BO VSVS

9 9 Version01_ Key Parameters: V S +I +V -V -I ITIT ISIS IHIH I DRM VTVT V DRM V BO VSVS

10 10 Version01_ Key Parameters: Holding Current (Ih) +I +V -V -I ITIT ISIS IHIH I DRM VTVT V DRM V BO VSVS

11 11 Version01_ Key Parameters: Surge Current Withstand Double Exponential Waveforms –Simulate induced lightning events –Rise time & decay time in microseconds 10 x x 20 2 x x x x 320

12 12 Version01_ Key Parameters: Power Cross Events Accidental contact with power lines Construction Accidents Traffic Accidents Weather-related Accidents Inductive coupling Co-locating telephone cables with power cables Improper grounding

13 13 Version01_ Outline Overvoltage Protection –The race is on –Clamp vs Crowbar Key Parameters –Vdrm –Vbo –Vs –Holding Current –Surge Current Withstand Double Exponential Waveforms Power Cross Considerations Protected Circuit Issues –Let-through voltage –Turn-on time –Capacitance Vbo Dependence Applied voltage dependence Surge Capability dependence Configurations –Single Devices –SLIC Devices –2-Chip Devices –3-chip Y Devices Package Options Selection Process

14 14 Version01_ Protected Circuit Issues: Let-Through Voltage Let-through voltage: The peak voltage that the protected circuit will see in the real application. Similar to the datasheet Vs value: –Vs is defined as the peak voltage measured directly across the SIDACtor at a particular voltage rate of rise. Dependent on: –Actual incident voltage rate of rise –Board layout: SIDACtor should be as near the entrance to the board as possible. SIDACtor should be in-line so that the surge must pass under the SIDACtor on the way to the protected circuit..

15 15 Version01_ Protected Circuit Issues: Turn-On Time Turn-On Time –Time to clamp –Time to crowbar –Clamp to crowbar transition time

16 16 Version01_ Protected Circuit Issues: Capacitance Vbo Dependence

17 17 Version01_ Protected Circuit Issues: Capacitance Applied Voltage Dependence

18 18 Version01_ Protected Circuit Issues: Capacitance Surge Capability Dependence P2300xxABCDREME Surge Rating (8x20) Capacitance 2V)

19 19 Version01_ Outline Overvoltage Protection –The race is on –Clamp vs Crowbar Key Parameters –Vdrm –Vbo –Vs –Holding Current –Surge Current Withstand Double Exponential Waveforms Power Cross Considerations Protected Circuit Issues –Let-through voltage –Turn-on time –Capacitance Vbo Dependence Applied voltage dependence Surge Capability dependence Configurations –Single Devices –SLIC Devices –2-Chip Devices –3-chip Y Devices Package Options Selection Process

20 20 Version01_ SIDACtor Device Configurations: Standard Single Devices The Original Flexible Board Layout

21 21 Version01_ SIDACtor Device Configurations: SLIC Single Devices SIDACtor Device for Negative Voltages Diode Device for Positive Voltages Subscriber Line Interface Circuit

22 22 Version01_ SIDACtor Device Configurations: 2-Chip Devices TwinChip 2-in-1 Packaging Matched Chips TwinSLIC 2-in-1 Packaging 1 pkg per port Broadband Optimized Half the capacitance Better linearity

23 23 Version01_ SIDACtor Device Configurations: 3-Chip Y Devices Lower Capacitance Better Capacitance Balance Better Voltage Balance Better Surge Balance 3-for-1 Placement Advantage

24 24 Version01_ SIDACtor Device Configurations: Tracking Devices BATTRAX Trademark Sophisticated SLIC protection Retains diodes for positive surges Negative breakdown voltage determined by reference Positive voltage tracking also available

25 25 Version01_ SIDACtor Device Configurations: Bridge Devices For Broadband Applications –And more! Patented Bridge Design Low Capacitance Great Capacitance Balance Perfect Voltage Balance Perfect Surge Balance Biasing provides flat lower and flatter capacitance

26 26 Version01_ Outline Overvoltage Protection –The race is on –Clamp vs Crowbar Key Parameters –Vdrm –Vbo –Vs –Holding Current –Surge Current Withstand Double Exponential Waveforms Power Cross Considerations Protected Circuit Issues –Let-through voltage –Turn-on time –Capacitance Vbo Dependence Applied voltage dependence Surge Capability dependence Configurations –Single Devices –SLIC Devices –2-Chip Devices –3-chip Y Devices Package Options Selection Process

27 27 Version01_ SIDACtor Part Numbering A: ITU K.20 & K.21 B: TIA-968-A C: GR-1089

28 28 Version01_ Package Options: Thru-Hole TO-218 E M A R G

29 29 Version01_ Package Options: Surface Mount 5x6 QFN 3x3 QFN 3.3x3.3 QFN S C Q22 U Q12 Q38 N

30 30 Version01_ Outline Overvoltage Protection –The race is on –Clamp vs Crowbar Key Parameters –Vdrm –Vbo –Vs –Holding Current –Surge Current Withstand Double Exponential Waveforms Power Cross Considerations Protected Circuit Issues –Let-through voltage –Turn-on time –Capacitance Vbo Dependence Applied voltage dependence Surge Capability dependence Configurations –Single Devices –SLIC Devices –2-Chip Devices –3-chip Y Devices Package Options Selection Process

31 31 Version01_ Selection Methods Datasheet Parameters –Vdrm, Vbo, Vs –Ih –Surge Current Withstand –Capacitance & Linearity Configuration Selection Package Selection

32 32 Version01_ Thank You!


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