TCS DL

CO
LO & MP
LI
GE
AN
N
T
FR
EE
*R
oH
S
**
HA
Features
■ High-speed performance
■ RoHS compliant* and halogen free**
■ Superior overcurrent protection
■ Bidirectional
Applications
■ VDSL and Ethernet ports
■ Low resistance
■ Excellent channel to channel resistance
matching
■ Small SMT package
■ Protection modules and dongles
■ Process control equipment
■ Test and measurement equipment
TCS-DL Series - TCS™ Dual Transient Current Suppressors
General Information
The Bourns® TCS™ DL Series High-Speed Protector 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 short circuits, induction
and lightning surges.
Bourns® TCS™ High-Speed Protectors are typically used in conjunction with low capacitance
TVS devices to form an extremely low let-through energy barrier to excessive voltages
and currents during surge events which may cause damage to unprotected high-speed,
low voltage driver and receiver components.
Out2
In2
Out1
In1
TCS™ Device
The Bourns® TCS™ High-Speed Protector is provided in a space-saving, surface mount
DFN package meeting industry standard requirements such as RoHS and Pb Free solder reflow profiles.
Absolute Maximum Ratings (@ TA = 25 °C Unless Otherwise Noted)
Symbol
Vimp
Top
Tstg
TJMAX
Parameter
Peak impulse voltage withstand with duration less than 1 ms
Operating temperature range
Storage temperature range
Maximum junction temperature
Value
40
-55 to +125
-65 to +150
+125
Unit
V
°C
°C
°C
Electrical Characteristics (@ TA = 25 °C Unless Otherwise Noted)
Symbol
Parameter
Part Number
Min.
Typ.
Max.
Unit
Itrigger
Current required for the device to go from operating state to
protected state
TCS-DL004-250-WH
TCS-DL004-500-WH
TCS-DL004-750-WH
250
500
750
375
750
1100
500
1000
1500
mA
RON
Series resistance of the TCS™ device
TCS-DL004-250-WH
TCS-DL004-500-WH
TCS-DL004-750-WH
1.6
1.0
0.7
2.3
1.4
1.0
3.0
1.8
1.3
Ω
ΔRON
Channel to channel resistance match
TCS-DL004-250-WH
TCS-DL004-500-WH
TCS-DL004-750-WH
±0.05
±0.03
±0.02
Ω
tlimit
Time for the device to go from normal operating state to current limiting state
Junction to air thermal resistance, FR4 PCB.
0.035 sq. in. of copper in addition to solder pads
RθJA
50
ns
130
°C/W
Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
EMEA: Tel: +36 88 520 390 • Fax: +36 88 520 211
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less;
(b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet 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-DL Series - TCS™ Dual Transient Current Suppressors
Performance Graphs
Basic Device Operation
Graph 1 below shows a normalized Typical V-I curve for Bourns
TCS™ DL Series High-Speed Protector products under surge
conditions. Graphs 2 and 3 show the change in resistance and
trip current versus temperature, respectively.
®
Normalized V-I Curve Under Surge Conditions
SURGE PROTECTION
The Bourns® TCS™ High-Speed Protector is designed to be
used in conjunction with a suitable overvoltage limiting device,
such as a TVS diode or a TISP® thyristor as shown below, to
provide comprehensive current and voltage limiting protection
against surges.
Normalized Current
1.2
Bourns® TCS™ HSP
1.0
0.8
0.6
0.4
PROTECTED
DEVICE
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-40
VOLTAGE
LIMITING
DEVICE
Coordination of Bourns® TCS™ High-Speed Protector with Overvoltage
Limiting Device
-30
-20
-10
0
10
20
30
40
Voltage (V)
Resistance Change vs. Temperature
Normalized Resistance
1.5
This two-stage protection limits the maximum voltage at the
interface to the clamping voltage of the overvoltage device,
while also limiting the current into the protected device to the
defined limit of the Bourns® TCS™ High-Speed Protector.
Designers should choose a Bourns® TCS™ High-Speed
Protector with a current limit that the protected device can
handle for the duration of the surge event.
1.4
The Bourns® TCS™ High-Speed Protector acts like a low value
resistor during normal operation. As the Bourns® TCS™ HighSpeed Protector has no electrical connection to anything other
than the signal line it protects, the capacitance to ground is
purely dictated by the capacitance of the device to surrounding
components and PCB traces, which with careful layout can be
kept to an absolute minimum.
1.3
1.2
1.1
1.0
0.9
0.8
0.7
-55
-35
-15
5
25
45
65
85
105
125
Temperature (°C)
Trip Current Change vs. Temperature
2.00
Normalized Trip Current
TRANSIENT
SURGE
1.75
1.50
The Bourns® TCS™ High-Speed Protector can block voltages
up to 40 V. This enables very low voltage electronics to be
protected by a lower capacitance, higher voltage TVS device,
thus achieving very low capacitive loading on high-speed signal
lines. For example, on a 3.3 V driver, a 12 V rated TVS may
be used, having much lower and more linear capacitance than
a lower voltage type. Even though a high voltage TVS is used,
the maximum stress seen by the protected device is much
lower than would be seen by using a low voltage TVS by itself,
as the current is limited to within the maximum limits of the
Bourns® TCS™ High-Speed Protector.
1.25
The Bourns® TCS™ High-Speed Protector is primarily designed
to offer superior and cost-effective protection of sensitive
electronics against high energy surges that are transient in
nature. Unlike the more complex TBU® High-Speed Protector
device, the TCS™ Protector does not exhibit a strong foldback
1.00
0.75
0.50
0.25
0
-55
-35
-15
5
25
45
65
Temperature (°C)
85
105
125
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet 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-DL Series - TCS™ Dual Transient Current Suppressors
Basic Device Operation (Continued)
characteristic after reaching the current limit, and therefore
doesn’t protect against DC and low frequency stresses
(typically achieved through the use of a transformer or
capacitive coupling). This is analogousto comparing the shunting characteristics of a Transient Voltage Suppressor device to
a thyristor type of protector, such as Bourns® TISP® devices.
Both the Bourns® TCS™ High-Speed Protector and TVS
Voltage Across TCS™ Device (Volts)
50
40
25 °C
30
85 °C
20
10
0.0001
0.001
0.01
0.1
1
Time (Seconds)
Voltage Across TCS™ Device (Volts)
TCS-DL004-750-WH SOA Single Surge Duration
TCS-DL004-250-WH SOA Single Surge Duration
0
0.00001
device have limited or no foldback characteristic, and therefore
have relatively low short term surge energy limits. When used
together in a protection circuit, the surge must not exceed the
thermal capability of either device. The following three graphs
show the maximum surge duration with respect to voltage of the
three TCS-DL devices at both +25 °C and +85 °C.
50
40
25 °C
30
85 °C
20
10
0
0.00001
0.0001
0.001
0.01
Time (Seconds)
Voltage Across TCS™ Device (Volts)
TCS-DL004-500-WH SOA Single Surge Duration
50
40
25 °C
30
85 °C
20
10
0
0.00001
0.0001
0.001
0.01
0.1
1
Time (Seconds)
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet 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.
0.1
1
TCS-DL Series - TCS™™ Dual
Single
Transient
Transient
Current
Current
Suppressors
Suppressors
Basic Device Operation (Continued)
COORDINATION
In all applications, the overvoltage protection device should be
chosen to limit the maximum voltage across the Bourns® TCS™
High-Speed Protector to less than the maximum voltage rating
of the device. If this maximum voltage limit is exceeded, the
Bourns® TCS™ High-Speed Protector may begin to avalanche,
and it will cease to effectively block the current into the
protected device, which may result in damage.
USING MULTIPLE TCS-DL DEVICES IN SERIES OR
PARALLEL
Bourns® TCS™ High-Speed Protectors may be connected in
parallel to achieve even lower on-state resistance. If matching
is required, use two Bourns® TCS-DL Series HSPs, and connect
one Bourns® TCS™ High-Speed Protector from each DL device
in parallel. In addition, because of their ultra-fast response, multiple Bourns® TCS™ High-Speed Protectors may be connected in
series to achieve multiples of the breakdown voltage.
Reference Applications
Two good examples of applications where the combination of
a Bourns® TCS™ High-Speed Protector and a voltage limiting device provides exceptional performance are in VDSL
and Ethernet circuits, where the line is driven differentially by a
transformer.
VDSL
In the VDSL application shown below, the transformer provides
additional protection against sustained DC faults and the coupling capacitors, C1 and C2, provide protection against DC and
mains frequency power faults. The termination resistors
R1 and R2 are reduced in value by the nominal resistance of
the Bourns® TCS™ High-Speed Protector to maintain the overall
termination resistance.
TIP
CDSOT23-S2004
C2
R1
LINE DRIVER1
C1
TCS-DL1 (a)
CDSOT23-S2004
1W
Zener Diode
RING
T1
R2
LINE DRIVER2
TCS-DL2 (b)
Basic Schematic of a VDSL Line Driver Stage
GbE
In the Gigabit Ethernet (GbE) application circuit shown below,
the transformer provides additional protection against sustained
DC faults and provides some isolation from surge conditions
such as lightning strikes. The TCS™ device limits the current
that the PHY will be subjected to under a surge condition. It
also provides voltage isolation so that the peak voltage that the
PHY is subjected to will be lower than the TVS diode
clamp voltage. The TVS diode will sink the majority of
the transformer secondary current and clamp the voltage
to a level that is below the 40 V maximum rating of the
TCS™ device.
To
LINE
Not Used
CDSOD323-TxxC
1CT:1CT
1/4 SM51589L
Ethernet
PHY
TCS-DL
Gigabit Ethernet Application Circuit
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet 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-DL Series - TCS™ Dual Transient Current Suppressors
Recommended Pad Layout
Product Dimensions
B
B
A
C
A
C
D
E
XXXXX
YWWLL
F
PIN 1
SEATING PLANE A1
J
J
Dim.
D
E
E
TCS-DL004-250-WH
TCS-DL004-500-WH
TCS-DL004-750-WH
0.80
(.031)
0.25
(.010)
0.30
(.012)
1.1
(.043)
1.45
(.057)
0.30
(.012)
0.80
(.031)
0.25
(.010)
0.30
(.012)
2.1
(.083)
1.45
(.057)
0.30
(.012)
0.80
(.031)
0.25
(.010)
0.30
(.012)
3.1
(.122)
1.45
(.057)
0.30
(.012)
M
A
F
4
5
6
B
G
C
F
D
3
1
2
H
K
G
E
F
H
M
Pad Designation
TCS-DL004-250-WH
TCS-DL004-500-WH
TCS-DL004-750-WH
Min.
Typ.
Max.
Min.
Typ.
Max.
Min.
Typ.
Max.
0.80
(.031)
0.00
(.000)
2.40
(.094)
3.90
(.154)
1.05
(.041)
0.20
(.008)
0.75
(.030)
1.40
(.055)
0.10
(.004)
0.25
(.010)
0.55
(.022)
0.20
(.008)
0.90
(.035)
0.025
(.001)
2.50
(.098)
4.00
(.157)
1.10
(.043)
0.25
(.010)
0.8
(.031)
1.45
(.057)
0.15
(.006)
0.30
(.012)
0.60
(.024)
0.25
(.010)
1.00
(.039)
0.05
(.002)
2.60
(.102)
4.10
(.161)
1.15
(.045)
0.30
(.012)
0.85
(.033)
1.50
(.059)
0.20
(.008)
0.35
(.014)
0.65
(.026)
0.30
(.012)
0.80
(.031)
0.00
(.000)
3.4
(.134)
3.90
(.154)
2.05
(.081)
0.20
(.008)
0.75
(.030)
1.40
(.055)
0.10
(.004)
0.25
(.010)
0.55
(.022)
0.20
(.008)
0.90
(.035)
0.025
(.001)
3.5
(.138)
4.00
(.157)
2.10
(.083)
0.25
(.010)
0.8
(.031)
1.45
(.057)
0.15
(.006)
0.30
(.012)
0.60
(.024)
0.25
(.010)
1.00
(.039)
0.05
(.002)
3.6
(.142)
4.10
(.161)
2.15
(.085)
0.30
(.012)
0.85
(.033)
1.50
(.059)
0.20
(.008)
0.35
(.014)
0.65
(.026)
0.30
(.012)
0.80
(.031)
0.00
(.000)
4.4
(.173)
3.90
(.154)
3.05
(.120)
0.20
(.008)
0.75
(.030)
1.40
(.055)
0.10
(.004)
0.25
(.010)
0.55
(.022)
0.20
(.008)
0.90
(.035)
0.025
(.001)
4.5
(.177)
4.00
(.157)
3.10
(.122)
0.25
(.010)
0.8
(.031)
1.45
(.057)
0.15
(.006)
0.30
(.012)
0.60
(.024)
0.25
(.010)
1.00
(.039)
0.05
(.002)
4.6
(.181)
4.10
(.161)
3.15
(.124)
0.30
(.012)
0.85
(.033)
1.50
(.059)
0.20
(.008)
0.35
(.014)
0.65
(.026)
0.30
(.012)
Dim.
A
A1
B
C
D
E
F
G
H
J
K
M
DIMENSIONS:
Pad #
1
2
3
Apply
In1
NC
Out1
Pad #
4
5
6
Apply
Out2
NC
In2
NC = Solder to PCB; do not make electrical connection, do not connect to ground.
DEVICE
BODY
OUTLINE
PCB MOUNTING PADS
SOLDER
STENCIL
OPENINGS
PCB MOUNTING PADS
Bourns® TCS™ High-Speed
Protectors have a matte-tin
termination. The recommended solder stencil thickness
is 0.10 to 0.12 mm (0.004
to 0.005 in.). The stencil
opening for pins 1,3,4 and
6 should be the same size
as the recommended PCB
pad size. The stencil openings for pins 2 and 5 of the
device should cover 60-70 %
of the area of the PCB pad
and should be divided into
smaller areas as shown in
the solder stencil figure.
MM
(INCHES)
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet 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-DL Series - TCS™ Dual Transient Current Suppressors
Typical Part Marking
How to Order
TCS - DL 004 - 500 - WH
5 DIGIT PRODUCT CODE:
• 1ST ALPHA CHARACTER INDICATES PRODUCT FAMILY:
D = TCS-DL SERIES
• 2ND & 3RD DIGITS INDICATE IMPULSE VOLTAGE.
• 4TH & 5TH DIGITS INDICATE TRIGGER CURRENT.
TCS™ Product
Series
DL = Dual Series
Impulse Voltage Rating
004 = 40 V
XXXXX
YWWLL
Minimum Trigger Current
250 = 250 mA
500 = 500 mA
750 = 750 mA
PIN 1
Hold to Trip Ratio Suffix
W = 2:1 Maximum to Minimum Trigger Current Ratio
Package Suffix
H = DFN Package
MANUFACTURING
DATE CODE:
• 1ST DIGIT INDICATES THE YEAR.
• 2ND & 3RD DIGITS INDICATE THE WEEK NUMBER.
• 4TH & 5TH DIGITS INDICATE LOT CODE.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet 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-DL Series - TCS™ Dual Transient Current Suppressors
Packaging Specifications
P0
B
D0
t
R
0.20
(.008)
MAX.
E
P2
F
A
W
N
C
D
B0
K0
0.12
(.005)
A0
P1
D1
QUANTITY: 3000 PIECES PER REEL
USER DIRECTION OF FEED
0.12
(.005)
G (MEASURED AT HUB)
A
Min.
326
(12.835)
B
Max.
330
(13.002)
N
Ref.
100
(3.937)
F
Min.
5.45
(.215)
Min.
1.5
(.059)
Max.
4.40
(.173)
Min.
1.50
(.059)
Min.
1.00
(.039)
Max.
1.20
(.047)
Min.
3.90
(.154)
Max.
0.35
(.014)
Min.
11.70
(.461)
0.25
(.010)
D
G
Max.
13.5
(.531)
Min.
20.2
(.795)
Max.
1.60
(.063)
Min.
1.50
(.059)
Max.
4.10
(.161)
Min.
7.90
(.311)
Max.
8.10
(.319)
DIMENSIONS:
MM
(INCHES)
D0
K0
Max.
5.55
(.219)
Max.
—
Min.
12.4
(.488)
D1
P0
Max.
14.4
(.567)
E
Max.
-
Min.
1.65
(.065)
P1
Max.
1.85
(.073)
P2
Min.
1.95
(.077)
Max.
2.05
(.081)
W
TCS-DL004250-WH
Min.
2.70
(.106)
Min.
12.8
(.504)
A0
Min.
4.20
(.165)
t
Min.
0.25
(.010)
C
Max.
2.5
(.098)
R
Max.
2.90
(.114)
TCS-DL004500-WH
B0
Min.
Max.
3.70
3.90
(.146)
(.154)
Max.
12.30
(.484)
TCS-DL004750-WH
Min.
4.70
(.185)
Max.
4.90
(.193)
REV. 12/15
“TBU” is a registered trademark of Bourns, Inc. in the United States and other countries.
“TCS” is a trademark of Bourns, Inc.
“TISP” is a registered trademark of Bourns Ltd., a Bourns Company, in the United States and other countries, except that “TISP” is a registered trademark of Bourns, Inc. in China.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet 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.