TBU-KE [BOURNS]
High Speed Protectors;
| 型号： | TBU-KE |
| 厂家： | 
BOURNS ELECTRONIC SOLUTIONS |
| 描述： | High Speed Protectors |
| 文件： | 总6页 (文件大小：526K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Features
Applications
■ Superior circuit protection
■ Overcurrent and overvoltage protection
■ Blocks surges up to rated limits
■ High speed performance
■ Small SMT package
■ Set top box LNB ports
■ Protection modules and dongles
■ Process control equipment
■ Test and measurement equipment
■ General electronics
E2550
0072
■ RoHS compliant*
■ Agency recognition:
TBU-KE Series - TBU® High Speed Protectors
General Information
Agency Approval
Description
The TBU-KE Series of Bourns® TBU®
(Transient Blocking Unit) products are very
low capacitance unidirectional high speed
Line Side
Load Side
1
2
UL
File Number: E315805
surge protection components designed to protect
against faults caused by short circuits, AC
power cross, induction and lightning surges.
TBU® Device
The TBU-KE is a unidirectional TBU® device: the TBU® protector will trip in less than
1 μs when the current reaches the maximum value in one direction only, that is when
Pin 1 is positive in voltage with respect to Pin 2. No current limiting exists in the oppo-
site polarity, and the TBU® protector appears as resistive in nature. The reverse current
should not exceed the maximum trip current level of the TBU® device. An external
diode may be used to prevent reverse current in DC biased applications.
The TBU® protector blocks surges and provides an effective barrier behind which sen-
sitive electronics will not be exposed to large voltages or currents during surge events.
After the surge, the TBU® device resets when the voltage across the TBU® device falls
to the V
level. The TBU® device will automatically reset on lines which have no DC
reset
bias or have DC bias below V
(such as unpowered signal lines).
reset
The TBU® device is provided in a surface mount DFN package and meets industry
standard requirements such as RoHS and Pb Free solder reflow profiles.
Absolute Maximum Ratings (@ T = 25 °C Unless Otherwise Noted)
A
Symbol
Parameter
Part Number
Value
Unit
TBU-KE025-xxx-WH
TBU-KE040-xxx-WH
TBU-KE050-xxx-WH
250
400
500
V
Peak impulse voltage withstand with duration less than 10 ms
V
V
imp
rms
TBU-KE025-xxx-WH
TBU-KE040-xxx-WH
TBU-KE050-xxx-WH
100
200
250
V
Continuous A.C. RMS voltage
T
T
Operating temperature range
Storage temperature range
-40 to +85
°C
°C
op
-65 to +150
stg
Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
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.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TBU-KE Series - TBU® High Speed Protectors
Electrical Characteristics (@ T = 25 °C Unless Otherwise Noted)
A
Symbol
Parameter
Part Number
Min.
Typ.
Max.
Unit
TBU-KExxx-050-WH
TBU-KExxx-100-WH
TBU-KExxx-200-WH
TBU-KExxx-300-WH
TBU-KExxx-500-WH
50
75
100
200
400
600
1000
100
200
300
500
150
300
450
750
Current required for the device to go from operating state to
protected state
I
mA
trigger
V
V
V
V
V
= 250 V I
= 250 V I
= 250 V I
= 250 V I
= 250 V I
(min.) = 50 mA TBU-KE025-050-WH
(min.) = 100 mA TBU-KE025-100-WH
(min.) = 200 mA TBU-KE025-200-WH
(min.) = 300 mA TBU-KE025-300-WH
(min.) = 500 mA TBU-KE025-500-WH
12.5
6.3
3.4
2.4
1.8
14.6
7.5
4.1
3.1
2.3
imp
imp
imp
imp
imp
trigger
trigger
trigger
trigger
trigger
V
V
V
V
V
= 400 V I
= 400 V I
= 400 V I
= 400 V I
= 400 V I
(min.) = 50 mA TBU-KE040-050-WH
(min.) = 100 mA TBU-KE040-100-WH
(min.) = 200 mA TBU-KE040-200-WH
(min.) = 300 mA TBU-KE040-300-WH
(min.) = 500 mA TBU-KE040-500-WH
13.0
6.8
3.9
3.0
2.3
15.2
8.1
4.7
3.7
2.9
imp
imp
imp
imp
imp
trigger
trigger
trigger
trigger
trigger
Series resistance of
the TBU device
Ω
R
device
®
V
V
V
V
V
= 500 V I
= 500 V I
= 500 V I
= 500 V I
= 500 V I
(min.) = 50 mA TBU-KE050-050-WH
(min.) = 100 mA TBU-KE050-100-WH
(min.) = 200 mA TBU-KE050-200-WH
(min.) = 300 mA TBU-KE050-300-WH
(min.) = 500 mA TBU-KE050-500-WH
13.7
7.5
4.6
3.6
3.0
16.0
8.9
5.5
4.5
3.6
imp
imp
imp
imp
imp
trigger
trigger
trigger
trigger
trigger
t
Time for the device to go from normal operating state to protected state
1
µs
block
®
I
Current through the triggered TBU device with 50 Vdc circuit voltage
0.25
12
0.50
16
1.00
mA
Q
®
Voltage below which the triggered TBU device will transition to normal operating
V
20
V
reset
state
R
R
Junction to package pads - FR4 using recommended pad layout
116
96
°C/W
°C/W
th(j-l)
th(j-l)
2
Junction to package pads - FR4 using heat sink on board (6 cm )
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TBU-KE Series - TBU® High Speed Protectors
Reference Application
Basic TBU Operation
The TBU® device can be used to protect against excessive
voltage surges in DC biased equipment, as shown in the figure
below. Diode D1 prevents reverse voltage surges from damaging
the equipment, and the TBU® protector prevents any positive
surges from causing damage. An overvoltage protection device,
such as an MOV, may be used to provide additional overvolt-
age protection if the surge voltage is likely to be above the
maximum rating of the TBU® device. D1 reverse voltage rating
should be greater than that of the OVP device at the maximum
surge current level. Typically, a 1N4007 is a suitable choice. D2
should be chosen to be above the normal working voltage of
the protected device, but below its absolute maximum rating.
The TBU® device is a silicon-based, solid-state, resettable
device which is placed in series with a signal path. The TBU®
device operates in approximately 1 µs - once line current
exceeds the TBU® device’s trigger current I
. When oper-
trigger
ated, the TBU® device restricts line current to less than 1 mA
typically. When operated, the TBU® device will block all system
voltages and any other voltages including the surge up to
rated limits.
After the surge, the TBU® device resets when the voltage
across the TBU® device falls to the V
level. The TBU® de-
reset
vice will automatically reset on lines which have no DC bias or
have DC bias below V (such as unpowered signal lines).
reset
If the line has a normal DC bias above V
, the voltage
reset
D1
1
2
across the TBU® device may not fall below V
after the
reset
surge. In such cases, special care needs to be taken to ensure
that the TBU® device will reset, otherwise an automatic or
manual power down will be required. Bourns application
engineers can provide further assistance.
Line
Side
OVP
D2
Equip.
TBU® Device
Performance Graphs
V-I Characteristic - TBU-KE050-300-WH (Pin 2-1)
Typical Trigger Current vs. Temperature
1.8
1.6
1.4
1.2
I
TRIGGER
CURRENT
(100 mA/div.)
V
RESET
1.0
0.8
0.6
0.4
VOLTAGE
(5 v/div.)
0.2
0.0
-75 -50 -25
0
25 50 75 100 125 150
Junction Temperature (°C)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TBU-KE Series - TBU® High Speed Protectors
Performance Graphs (Continued)
Power Derating Curve
Typical Resistance vs. Temperature
3.0
2.2
2.0
1.8
No additional PCB Cu
0.5 sq. in. additional PCB CU
2.5
2.0
1.5
1.0
0.5
0.0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
20
40
60
80
100
120
140
-75 -50 -25
0
25 50 75 100 125 150
Junction Temperature (°C)
Junction Temperature (°C)
Reflow Profile
Profile Feature
Pb-Free Assembly
Average Ramp-Up Rate (Tsmax to Tp)
3 °C/sec. max.
Preheat
- Temperature Min. (Tsmin)
- Temperature Max. (Tsmax)
- Time (tsmin to tsmax)
150 °C
200 °C
60-180 sec.
Time maintained above:
- Temperature (TL)
- Time (tL)
217 °C
60-150 sec.
Peak/Classification Temperature (Tp)
Time within 5 °C of Actual Peak Temp. (tp)
Ramp-Down Rate
260 °C
20-40 sec.
6 °C/sec. max.
8 min. max.
Time 25 °C to Peak Temperature
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TBU-KE Series - TBU® High Speed Protectors
Product Dimensions
0.60
0.85 0.05
(.02ꢀ4
0.75
(.0304
(.033 .0024
0.30
3.05
(.1204
(.0124
5.00 0.10
(.197 .00ꢀ4
0.30
(.0124
1.90
(.0754
2.50 0.10
(.098 .00ꢀ4
0.30
(.0124
0.25
(.0104
PIN 1 & BACKSIDE CHAMFER
C
PIN 1
MM
(INCHES4
DIMENSIONS:
0.00 - 0.05
(.000 - .0024
1.00
(.0394
Thermal Resistance vs. Additional PCB Cu Area
Recommended Pad Layout
TBU® protectors have matte-tin termination finish. The
suggested layout should use Non-Solder Mask Define (NSMD).
The recommended stencil thickness is 0.10-0.12 mm (.004-
.005 in.) with a stencil opening size 0.025 mm (.0010 in.) less
than the device pad size. As when heat sinking any power
device, it is recommended that wherever possible, extra PCB
copper area is allowed. For minimum parasitic capacitance, do
not allow any signal, ground or power signals beneath any of
the pads of the device.
100
90
80
70
60
50
ꢀ0
30
20
10
0
Pad Designation
Pad #
Pin Out
Line Side
Load Side
1
2
2
1
0
0.2 0.ꢀ
0.6 0.8 1.0
1.2 1.ꢀ
1.6
1.8 2.0
Added Cu Area (Sq. In.4
Dark grey areas show added PCB copper area for better
thermal resistance.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
TBU-KE Series - TBU® High Speed Protectors
How to Order
Typical Part Marking
TBU - KE 025 - 500 - WH
MANUFACTURER’S
TRADEMARK
PRODUCT CODE
- 1ST DIGIT INDICATES PRODUCT FAMILY:
E = TBU-KE SERIES
TBU® Product
Series
- 2ND & 3RD DIGITS INDICATE IMPULSE VOLTAGE:
25 = 250 V
40 = 400 V
50 = 500 V
KE = Uni-Series
- 4TH & 5TH DIGITS INDICATE TRIGGER CURRENT:
Impulse Voltage Rating
025 = 250 V
05 = 50 mA
30 = 300 mA
10 = 100 mA
50 = 500 mA
20 = 200 mA
040 = 400 V
050 = 500 V
PIN 1
Trigger Current
050 = 50 mA
100 = 100 mA
200 = 200 mA
300 = 300 mA
500 = 500 mA
MANUFACTURING
DATE CODE
- 1ST DIGIT INDICATES THE YEAR’S 6-MONTH PERIOD.
- 2ND DIGIT INDICATES THE WEEK NUMBER IN THE 6-MONTH PERIOD.
- 3RD & 4TH DIGITS INDICATE SPECIFIC LOT FOR THE WEEK.
6-MONTH PERIOD CODES:
A = JAN-JUN 2009
B = JUL-DEC 2009
C = JAN-JUN 2010
D = JUL-DEC 2010
E = JAN-JUN 2011
F = JUL-DEC 2011
Hold to Trip Ratio Suffix
W = Hold to Trip Ratio
Package Suffix
H = DFN Package
Packaging Specifications
P
0
E
D
P
2
t
B
TOP
COVER
TAPE
A
N
F
W
C
D
B
0
K
0
CENTER
LINES OF
CAVITY
A
0
D
1
EMBOSSMENT
P
G (MEASURED AT HUB)
USER DIRECTION OF FEED
QUANTITY: 3000 PIECES PER REEL
A
B
C
D
G
N
Min.
176
(6.929)
Max.
178
(7.008)
Min.
1.5
(.059)
Max.
2.5
(.098)
Min.
12.8
(.504)
Max.
13.5
(.531)
Min.
20.2
(.795)
Max.
-
Ref.
16.5
(.650)
Ref.
102
(4.016)
A
B
D
D
E
F
0
0
0
1
Min.
Max.
4.4
(.173)
Min.
6.65
(.262)
Max.
7.05
(.277)
Min.
1.5
(.059)
Max.
1.6
(.063)
Min.
1.5
(.059)
Max.
Min.
1.65
(.065)
Max.
1.85
(.073)
Min.
7.4
(.291)
max.
4.2
(.165)
7.6
(.299)
-
K
P
P
0
P
t
W
2
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
1.1
(.043)
1.3
(.051)
7.9
(.311)
8.1
(.319)
3.9
(.159)
4.1
(.161)
1.9
(.075)
2.1
(.083)
0.25
(.010)
0.35
(.014)
15.7
(.618)
16.3
(.642)
MM
(INCHES)
DIMENSIONS:
12/10
“TBU” is a registered trademark of Bourns, Inc. in the U.S., Taiwan and European Community.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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