Introduction to SIDACtor

1
Introduction to SIDACtor Overvoltage Protection
Devices
2
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
The Race is On!
Overvoltage Protector
Protected Circuit
Overvoltage Event
4
Clamping Devices vs Crowbar Devices
5
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
Key Parameters

• Voltage Current (V-I) Curve
• Voltage is displayed left to right
• Current is displayed up and down

7
Key Parameters VDRM
I
IT
IS
IH
IDRM
-V
V
VDRM
VBO
VS
VT
-I
8
Key Parameters VBO
I
IT
IS
IH
IDRM
-V
V
VDRM
VBO
VS
VT
-I
9
Key Parameters VS
I
IT
IS
IH
IDRM
-V
V
VDRM
VBO
VS
VT
-I
10
Key Parameters Holding Current (Ih)
I
IT
IS
IH
IDRM
-V
V
VDRM
VBO
VS
VT
-I
11
Key Parameters Surge Current Withstand

• Double Exponential Waveforms
• Simulate induced lightning events
• Rise time decay time in microseconds

10 x 1000 8 x 20 2 x 10
10 x 700 10 x 560 5 x 320
12
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
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
Protected Circuit IssuesLet-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
Protected Circuit IssuesTurn-On Time

• Turn-On Time
• Time to clamp
• Time to crowbar
• Clamp to crowbar transition time

16
Protected Circuit IssuesCapacitance

• Vbo Dependence

17
Protected Circuit IssuesCapacitance

• Applied Voltage Dependence

18
Protected Circuit IssuesCapacitance

• Surge Capability Dependence

P2300xx A B C D RE ME
Surge Rating (8x20) 150 250 400 1000 3000 5000
Capacitance (pF _at_ 2V) 30 38 55 65 220 475
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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
SIDACtor Device ConfigurationsStandard Single
Devices

• The Original
• Flexible Board Layout

21
SIDACtor Device ConfigurationsSLIC Single
Devices

• SIDACtor Device for Negative Voltages
• Diode Device for Positive Voltages
• Subscriber
• Line
• Interface
• Circuit

22
SIDACtor Device Configurations2-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
SIDACtor Device Configurations3-Chip Y Devices

• Lower Capacitance
• Better Capacitance Balance
• Better Voltage Balance
• Better Surge Balance
• 3-for-1 Placement Advantage

24
SIDACtor Device ConfigurationsTracking Devices

• BATTRAX Trademark
• Sophisticated SLIC protection
• Retains diodes for positive surges
• Negative breakdown voltage determined by
  reference
• Positive voltage tracking also available

25
SIDACtor Device ConfigurationsBridge 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
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
SIDACtor Part Numbering
A ITU K.20 K.21
B TIA-968-A
C GR-1089
28
Package OptionsThru-Hole
G
E
TO-218
M
R
A
29
Package OptionsSurface Mount
Q12
3x3 QFN 3.3x3.3 QFN
C
Q22
S
U
Q38
N
5x6 QFN
30
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
Selection Methods

• Datasheet Parameters
• Vdrm, Vbo, Vs
• Ih
• Surge Current Withstand
• Capacitance Linearity
• Configuration Selection
• Package Selection

32
Thank You!