Bourns® Electronic Current Limiters TCS™ & TBU® High-Speed Protectors Short Form

Bourns® Electronic Current Limiters
TCS™ & TBU® High-Speed Protectors
Short Form Brochure
Bourns® TCS™ HSP Product Overview
Basic TCS™ HSP Device Operation
The Bourns® TCS™ DL Series High-Speed Protector (HSP)
products contain dual, well-matched, low resistance,
bidirectional, very high-speed Transient Current Suppressors.
By limiting the maximum current to a safe level, a Bourns®
TCS™ DL device offers superior protection for very high data
rate differential lines against faults caused by momentary
short circuits, induction and lightning surges.
A TCS™ device is designed to trigger at a specified current
level and provide a moderate amount of foldback. The
following graph shows the normalized response of the device.
Normalized Current (A)
TCS™ Device - VI Curve
1.2
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-40
Current Limit is Active
Linear Resistance
(Slope = 1/Series Resistance)
-30
-20
-10
0
10
20
30
40
Choosing between a TCS™ or TBU® HSP
2
50 ns response time
Low let-through energy
Low series resistance
Well-matched channel to channel resistance
Low insertion loss
Three trigger current levels available
Key Benefits:
• Creates ideal diode response to maximize protection
- New approach: TVS diode and a TCS™ HSP working with the internal ESD protection of the protected circuit
• Supports applications up to a frequency of 6 GHz
• Up to 90 % reduction in stress compared to stand-alone Overvoltage Protection (OVP)
• Negligible impact on differential signal balance
• Improves product reliability compared to stand-alone OVP
• Can reduce product repair costs
Step 1: Current characterization:
Determine the maximum signal current and the maximum operating temperature of the application (e.g., 100 mA and 65 °C).
Maximum Voltage
TCS-DL
TBU® HSP
High Voltage Rating Required (> 40 V)
N
Y
Strong Foldback Required
N
Y
Short Duration Transient
Y
Y
Continuous or Repetitive AC Fault Condition
N
Y
Very Low Series Resistance Required (< 3 Ω)
Y
N
Overvoltage Protection Device Alone Provides Inadequate Protection
Y
Y
Very Well-matched Channel to Channel Resistance Required
Y
N
Extremely Fast Response Time Required
(from Normal Operation to Protected State)
Y
N*
Extremely Fast Reset Time Required
Y
N*
* Except Model P40-G240-WH.
•
•
•
•
•
•
TCS™ HSP Device-based Solution Selection
Voltage (V)
Condition
Key Features:
Step 2: Overvoltage selection:
Determine the trip current derating factor using the data sheet graph and divide the maximum operating current by this number (e.g., 100 mA/0.75 = 133 mA).
Step 3: TCS™ HSP device selection:
Pick a TCS™ device with a minimum trip current at
25 °C that is above the number calculated in step 2
(e.g., The Model TCS-DL004-250-WH has a
minimum trip current of 250 mA, making it the lowest
trip current device that will work in the example).
Step 4: Tertiary protection:
Determine whether the selected device’s series
resistance will adversely affect circuit performance. If a lower resistance device is required, then a device
with a higher trip current should be selected.
Bourns® TCS™ HSP Product Examples
Create the Ideal Diode Response with a Bourns® TCS™ High-Speed Protector
20
18
1/2 TCS-DL004-xxx-WH
To Connector
DIODE CURRENT (A)
16
Protected
Circuit
CDSOD323-T05C
“Ideal” diode response of a
TVS Diode with the TCS™
HSP device at the interface
requiring protection
14
12
10
8
CDSOD323-T05C
IDEAL DIODE (5.5 V)
NEW APPROACH
6
4
2
0
In this example the protected circuit contains an ESD protection
design that clamps at ~ 5.6 V with a current of 300 mA. 0
TCS-DL004-500-WH
TCS-DL004-500-WH
8
10
12
14
16
18
20
RC
To Receiver
TCS-DL004-500-WH
CD0603-S0180
V+
CD143A-SR70
SMAJ24A
VDSL Driver
6
VDSL Class H Driver Protection for ITU-T K.21
To Receiver
RV
4
DIODE VOLTAGE (V)
VDSL Class H Driver – Fully Resettable GR-1089
ISSUE 6 Solution for Port Types 1, 3 and 5
RC
2
TCS-DL004-500-WH
1:1.4
RV
33 nF
10
VCD0603-S0180
1:1.4
RC
To Receiver
RC
2036-42-SM-RPLF
CDSOT236DSL03xx*
RT
VCD0603-S0180
V+
CD0603-S0180
2038-80-SM-RPLF
To Receiver
VDSL Driver
Gigabit Ethernet Surge Protection – GR-1089
ISSUE 6 Port Type 4, ITU-T K.21 Basic
Test Results for Gigabit Ethernet
Surge Protection Circuit
T
T
Ch1 Max
6.10 V
2
1 CT : 1 CT
Not Used
To Connector
5.4 V
M
Ethernet
PHY
PHY + Voltage
1/4 SM51589L
PHY - Voltage
Ideal Diode Response
Differential PHY Voltage
Ch2 Min
-4.61 V
Ch3 Max
595 mA
CDSOD323-T05C
280 mA
Ch4 Max
102 A
TCS-DL004-250-WH
3
Surge Current
Ch2
Ch1 5.00 V
Ch3 200 mA
Ch4
Math
10.0 V
5.00 V
50.0 A
400 ns
PHY Input Current
M 400 ns
A Ch3
196 mA
PHY sees:
Peak Voltage: 5.4 V
Peak Current: 595 mA
Energy: ~ 3 µJ
T 10.00 %
3
Bourns® TBU® HSP Product Overview
Basic TBU® HSP Device Operation
Bourns® TBU® High-Speed Protectors (HSPs) are
circuit protection devices constructed using MOSFET
semiconductor technology. When placed in series
with a signal line, the TBU® HSP monitors the current
flowing through the line. If the current exceeds a preset
level, the TBU® HSP triggers, providing an effective
barrier to high voltages and currents.
The TBU® HSP begins protecting in less than 1 μs, once
line current exceeds the TBU® device’s trigger current
Itrigger. When in the protected state, the TBU® HSP
restricts line current to less than 1 mA typically, and
blocks voltages up to the maximum voltage rating of
the device.
At the end of a surge event, the TBU® HSP will begin
the reset process when the voltage across the device
drops below the Vreset level and will complete the reset
process when the signal line returns to its normal
operating range.
If the line has a normal DC bias above Vreset, the
voltage across the TBU® HSP may not fall below Vreset
after the surge. In such cases, special care needs to be
taken to ensure that the TBU® HSP will reset. Bourns’
application engineers can provide further assistance.
Example TBU® HSP VI Curve (TBU-CA050-300-WH)
I TRIP
CURRENT
(100 mA/div)
VRESET
VOLTAGE
(5 V/div)
4
Key Features:
•
•
•
•
•
•
TBU® HSP is a series protection device
Triggers at a specified current
Can block voltages up to 850 V, enabling easy coordination
Provides superior protection in less than 1 µs
Resets on voltage (Vreset Valve)
Does not add capacitance to the signal line
Key Benefits:
•
•
•
•
•
•
•
•
•
High-speed performance
Blocks voltages and currents
Extremely low let-through energy
Self-resetting (Vreset Valve)
Very high bandwidth up to 3 GHz
Small size in DFN package
Model TBU-PL series offers voltage triggering
Small PCB area
Ultra-low profile
TBU® HSP Device-based Solution Selection
Step 1: Current characterization:
Determine the peak system operating current and maximum operating ambient temperature. Use the TBU® HSP data sheet’s “trigger current versus temperature”
derating curve to determine the TBU® HSP derating value. Step 2: Overvoltage selection:
Select an overvoltage device that has the lowest available DC breakdown voltage greater than the normal
system voltages and any expected AC power faults. The
selected device must also be capable of handling the
required lightning current.
Step 3: TBU® HSP device selection:
Choose a TBU® HSP device with a maximum impulse
voltage (Vimp) greater than the maximum impulse
breakover or clamping voltage of the selected overvoltage
protector at the required peak surge current. The selected
TBU® device must also have a minimum specified Itrigger
(use derating value from step 1) above the maximum peak
system operating current.
Step 4: Tertiary protection:
In many applications, the protected circuit can source and
sink sufficient current to trigger the TBU® HSP. When this
is not the case, a small avalanche diode to ground or small
signal diodes clamping to the power supply and ground
may be placed after the TBU® device. This will ensure that
the TBU® HSP triggers and properly protects the circuit.
Bourns® TBU® HSP Product Examples
VOICE Protection Solution Selection Guide
Bourns® TBU® Device Selection
Industry Standard
Telcordia GR-1089-CORE
Intra-building
Port Type 4
Telcordia GR-1089-CORE
Intra-building
Port Type 4a
Non-GR-1089-CORE Intrabuilding Specifications
ITU-T Basic K.20, K.21,
K.45
ITU-T Enhanced K.20,
K.21, K.45
Surge & AC
Withstand
1500 V, 100 A, 2/10 µs
120 Vrms, 25 A, 900 s
TBU® Device
Part Number
TBU-PL050-200-WH
Qty.
1
OVP Device
Part
Number
MOV-07D201K
VOICE SOLUTION EXAMPLE
Qty.
GND
TBU-PL060-200-WH
Line 1
Line 1
SLIC
2
MOV-10D201K
TBU
1000 V, 100 A, 10/1000 µs
TBU-PL060-200-WH
120 Vrms, 25 A, 900 s
1
MOV-10D201K
MOV-10D201K
2
Line 2
SLIC
Line 2
5000 V, 500 A, 2/10 µs
230 Vrms, 25 A, 900 s
TBU-PL085-200-WH
1
MOV-10D361K
2
1500 V, 100 A, 2/10 µs
275 Vrms, 25 A, 900 s
TBU-PL085-200-WH
1
MOV-10D431K
2
Review VOICE Protection Solution Selection Guide to select
TBU® HSP and overvoltage part numbers to meet protection
industry standard.
TBU-PL075-200-WH
1
MOV-10D361K
2
1000 V, 100 A, 10/1000 µs Surge Test Results
TBU-PL060-200-WH
1
TISP4400M3BJ
2
4000 V, 40 Ω, 10/700 µs
230 Vrms 10 Ω - 1000 Ω,
900 s
600 Vrms 600 Ω, 0.2 s
4000 V, 40 Ω, 10/700 µs
230 Vrms 10 Ω -1000 Ω,
900 s
600 Vrms 600 Ω, 0.1 s
6000 V, 40 Ω, 10/700 µs
240 Vrms 10 Ω - 1000 Ω,
900 s
600 Vrms 600 Ω, 0.2 s
600 Vrms 600 Ω, 1 s*
1500 Vrms, 200 Ω, 2 s*
6000 V, 40 Ω, 10/700 µs
240 Vrms 10 Ω - 1000 Ω,
900 s
600 Vrms 600 Ω, 1 s
1500 Vrms, 200 Ω, 2 s
-VBAT
Surge Voltage (100 V/DIV)
TBU-PL085-200-WH
1
MOV-10D391K
2
Ch1 Max
292 V
Ch4 Max
520 mA
1
TBU® HSP Current (200 mA/DIV)
4
TBU-PL060-200-WH
1
TISP4500H3BJ
2
* Gas Discharge Tube (GDT) special test protector with DC breakdown (DCBD) of less than 330 V.
Notes:
1) The MOV maximum continuous rms voltage rating should not be exceeded. The exception is where the data sheet highlights withstand capability such as the 600 Vrms, 1 A for 0.2 s, for example.
2) If EN55024 EMC compliance is required, the TBU® device may require capacitors to be fitted between the Tip and Ring connections and ground (i.e., in parallel with the MOV device). The capacitance value can be chosen to meet levels as follows:
• 10 nF for EN55024 Level 1
• 20 nF for EN55024 Level 2
• 47 nF for EN55024 Level 3
Selection of capacitor voltage rating depends upon TBU® HSP part number selection. Recommendations include:
• TBU-PL050 & TBU-PL060 Series: 120 VAC, 500 V Peak Surge Rated
• TBU-PL075 & TBU-PL085 Series: 240 VAC, 750 V Peak Surge Rated
Ch1
100 V
Ch4
200 mA Ω
M 1.00 µs
A Ch1
64 V
120 Vrms, 25 A Power Fault Test Results
AC Voltage (100 V/DIV)
Ch1 RMS
120 V
Ch4 Max
55.6 mA
4
1
Ch4 Min
-58.8 mA
TBU® HSP Current (200 mA/DIV)
Ch1
100 V
Ch4
20.0 mA Ω
M 4.00 ms
A Line
1.60 mV
5
Bourns® TBU® HSP Product Examples
VDSL
CANBUS
VDSL
Driver
TBU-CA065-100-WH
CDSOD323-T12C
2031-23T-SM
C1a
CANBUS
2031-15T-SM
TBU-CA050-500-WH
C1b
Diode voltage dependent on CANbus driver resistibility. Typically, 6 - 20 V, check specification.
Video Surveillance
T1/E1 Interface
T1a
Transformer
TBU1
TTIP
P850-U
T1/E1 TRING
Physical Line
Interface
RTIP
Unit
1
T1b
CM Transformer
1
2
3
4
8
7
6
5
1.25 A
Fuse
Fuse
1.25 A
TBU1
P850-U
TxTIP
2031-42T-SM
1.25 A
Fuse
TBU-CA065-100-WH
(TBU-CA085-100-WH) 2031-23T-SM
CDSOD323-T05LC
(2015-23-xxx)
SDI
TxRING
RxTIP
2031-42T-SM
1
RRING
Fuse
1.25 A
RxRING
RS232 Interface
Intelligent Transport System
TBU-CA065-100-WH
(TBU-CA085-100-WH)
RS232
TBU-CA065-200-WH
(TBU-CA085-100-WH) 2031-23T-SM
(2015-23-xxx)
CDSOD323-T24C
75 Ω
RS422 Interface
2031-23T-SM
(2015-23-xxx)
Microwave Link
TBU-CA065-100-WH
CDSOD323-T12C
MOV-10D201K
RS422
75 Ω Coax
Composite
Video
TBU-CA025-300-WH
HV LP
Filter
DC or AC
Power
IF TX/RX
2031-15T-SM
Protection for higher power split-mounted infrared feed equipment
6
Ethernet Surge and Power Cross Protection –
GR-1089 ISSUE 6, Port Type 4
RS485 Interface
TBU-CA065-300-WH
CDSOT23-SM712
MOV-10D201K
1 CT : 1 CT
RS485
2031-23T-SM-RPLF
Not Used
Ethernet
PHY
To Connector
2031-23T-SM-RPLF
1/4 SM51589L
TBU-DT065-300-WH
MOV-10D201K
Ethernet Protection Circuit Test Results –
Differential Surge Test: 800 V, 1.2/50 μs Voltage, 8/20 μs Current
TBU® HSP Current (2 A/DIV)
Ch1 Max
552 V
3
4
Total Surge Current (50 A/DIV)
Ch1 Max
510 V
Ch3 Max
2.12 A
Ch3 Max
2.12 A
3
Ch4 Max
109.0 A
TBU® HSP Current (2 A/DIV)
GDT Voltage (200 V/DIV)
1
1
GDT Voltage (500 V/DIV)
M 40.0 ns
A Ch1
140 V
M 4.00 µs
A Ch1
80 V
AC Power Cross Test 120 Vrms, 25 A
M
Ch3 Min
-410 mA
Ch3 Max
430 mA
Power Cross Voltage (100 V/DIV)
Math RMS
120 V
3
TBU® HSP Current (500 mA/DIV)
M 4.00 ms
A Ch1
-12 V
7
Dual Channel Bidirectional TCS™ HSP
TCS-DL Product Family
Maximum Ratings
Part
Number
Itrigger (mA)
Ron (Ω)
Max.
375
500
50
2.3
4.00 x 2.50
500
750
1000
50
1.4
4.00 x 3.50
750
1100
1500
50
1.0
4.00 x 4.50
Min.
Typ.
TCS-DL004-250-WH
40
250
TCS-DL004-500-WH
40
TCS-DL004-750-WH
40
Maximum peak impulse voltage withstand with duration less than 10 ms.
Current required for the device to go from operating state to protected state.
Time for the device to go from normal operating state to current limiting state.
Series resistance of the TCS™ device.
See data sheet for detailed specifications.
Device Size
(mm)
tlimit
(ns)
Vimp
(V)
Vimp
Itrigger tlimit Ron 8
Operating Characteristics
Typ.
Form Factor
D
A R0B42
C
D
A R0B45
C
D
A R0B47
C
Unidirectional Dual TBU® HSP
TBU-DT Product Family
Maximum Ratings
Part
Number
Operating Characteristics
Vimp
(V)
Vrms
(V)
Itrigger
Min.
(mA)
Itrigger
Max.
(mA)
tblock
(µs)
Rtyp
(Ω)
TBU-DT065-100-WH
650
300
100
200
1
8.5
TBU-DT065-200-WH
650
300
200
400
1
5.6
TBU-DT065-300-WH
650
300
300
600
1
4.6
TBU-DT065-500-WH
650
300
500
1000
1
4.0
TBU-DT085-100-WH
850
425
100
200
1
10.3
TBU-DT085-200-WH
850
425
200
400
1
7.4
TBU-DT085-300-WH
850
425
300
600
1
6.8
TBU-DT085-500-WH
850
425
500
1000
1
5.8
Vimp
Vrms
Itrigger tblock Rtyp Device Size
(mm)
5.00 x 5.00
Form Factor
T85
5
007
4
Maximum peak impulse voltage withstand with duration less than 10 ms.
Maximum continuous alternating current RMS voltage.
Minimum and maximum current required for the device to go from operating state to protected state.
Maximum time for the device to go from normal operating state to protected state.
Typical series resistance of the TBU® device.
Consult factory for alternate specification values. See data sheet for detailed specifications.
9
Bidirectional Dual TBU® HSP
P40, TBU-PL & P850-G Product Families
Maximum Ratings
Part
Number
Operating Characteristics
Vrms
(V)
Itrigger
Min.
(mA)
Itrigger
Max.
(mA)
tblock
(µs)
Rtyp
(Ω)
P40-G240-WH
40
28
240
480
0.2
3.6
TBU-PL050-100-WH
500
300
100
200
1
50
TBU-PL050-200-WH
500
300
200
400
1
50
TBU-PL060-100-WH
600
350
100
200
1
50
TBU-PL060-200-WH
600
350
200
400
1
50
TBU-PL075-100-WH
750
400
100
200
1
50
TBU-PL075-200-WH
750
400
200
400
1
50
TBU-PL085-100-WH
850
425
100
200
1
50
TBU-PL085-200-WH
850
425
200
400
1
50
P850-G120-WH
850
425
100
200
1
50
4.00 x 8.25
P850-G200-WH
850
425
200
400
1
50
4.00 x 8.25
Vimp
Vrms
Itrigger tblock Rtyp Form Factor
4.00 x 4.00
6.50 x 4.00
Maximum peak impulse voltage withstand with duration less than 10 ms.
Maximum continuous alternating current RMS voltage.
Minimum and maximum current required for the device to go from operating state to protected state.
Maximum time for the device to go from normal operating state to protected state.
Typical series resistance of the TBU® device.
Consult factory for alternate specification values. See data sheet for detailed specifications.
10
Device Size
(mm)
Vimp
(V)
L
C955401
Bidirectional Single TBU® HSP
TBU-CA Product Family
Maximum Ratings
Part
Number
Operating Characteristics
Vimp
(V)
Vrms
(V)
Itrigger
Min.
(mA)
Itrigger
Max.
(mA)
tblock
(µs)
Rtyp
(Ω)
TBU-CA025-050-WH
250
100
50
100
1
13.3
TBU-CA025-100-WH
250
100
100
200
1
7.1
TBU-CA025-200-WH
250
100
200
400
1
4.2
TBU-CA025-300-WH
250
100
300
600
1
3.2
TBU-CA025-500-WH
250
100
500
1000
1
2.6
TBU-CA040-050-WH
400
200
50
100
1
14.3
TBU-CA040-100-WH
400
200
100
200
1
8.1
TBU-CA040-200-WH
400
200
200
400
1
5.2
TBU-CA040-300-WH
400
200
300
600
1
4.3
TBU-CA040-500-WH
400
200
500
1000
1
3.6
TBU-CA050-050-WH
500
250
50
100
1
15.7
TBU-CA050-100-WH
500
250
100
200
1
9.5
TBU-CA050-200-WH
500
250
200
400
1
6.6
TBU-CA050-300-WH
500
250
300
600
1
5.6
TBU-CA050-500-WH
500
250
500
1000
1
5.0
TBU-CA065-050-WH
650
300
50
100
1
17.7
TBU-CA065-100-WH
650
300
100
200
1
11.5
TBU-CA065-200-WH
650
300
200
400
1
8.6
TBU-CA065-300-WH
650
300
300
600
1
7.6
TBU-CA065-500-WH
650
300
500
1000
1
7.0
TBU-CA085-050-WH
850
425
50
100
1
21.4
TBU-CA085-100-WH
850
425
100
200
1
15.2
TBU-CA085-200-WH
850
425
200
400
1
12.3
TBU-CA085-300-WH
850
425
300
600
1
11.3
TBU-CA085-500-WH
850
425
500
1000
1
10.7
Device Size
(mm)
6.50 x 4.00
Form Factor
A
E075050
5
11
Worldwide Sales Offices
CountryPhone
Americas: +1-951-781-5500 Brazil:
+55 11 5505 0601 China:
+86 21 64821250
EMEA:
+36 88 520 390
Japan: +81 49 269 3204 Singapore: +65 6348 7227 Taiwan:
+886 2 25624117 Other Asia-Pacific Countries: +886 2 25624117 Fax
+1-951-781-5006
+55 11 5505 4370
+86 21 64821249
+36 88 520 211
+81 49 269 3297
+65 6348 1272
+886 2 25624116
+886 2 25624116
Technical Assistance
RegionPhone
Asia-Pacific: +886 2 25624117 EMEA: +36 88 520 390
Americas: +1-951-781-5500 Fax
+886 2 25624116
+36 88 520 211
+1-951-781-5700
www.bourns.com
Bourns® products are available through an extensive network of manufacturer’s representatives, agents and distributors. To
obtain technical applications assistance, a quotation, or to place an order, contact a Bourns representative in your area.
Specifications are subject to change without notice. The device characteristics and parameters in this brochure can and do vary in
different applications and actual device performance may vary over time. Users should verify actual device performance in their
specific applications.
“TCS” is a trademark of Bourns, Inc. in the U.S. and other countries.
“TBU” is a registered trademark of Bourns, Inc. in the U.S. and other countries, except Japan.
All references to TBU® in this document for use in Japan shall be deemed to be replaced with Bourns® TBU™.
“Bourns” is a registered trademark of Bourns, Inc. in the U.S. and other countries.
COPYRIGHT© 2015, BOURNS, INC. • PSG • 4/15 • 3M/FU1409
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