Download KETEK App Note TEC REV0 2011-05

KETEK
VITUS Silicon Drift Detector
Steffen Pahlke
APPLICATION NOTE
KETEK VITUS Silicon Drift Detector (SDD)
equipped with new optimised Thermo-Electric Cooler (TEC, Peltier)
The new KETEK Thermo-Electric Cooler (TEC) or Peltier is an especially optimized device with a 30%
better power efficiency. With a maximum current of 700mA and a voltage of 3.6V (2.5W) a
temperature difference of at least 75K can be achieved. The typical operating temperature of -35°C at
a heat sink temperature of 20°C can already be achieved at less than 300mA with a voltage below
1.7V equal a power of less than 0.5W. Additionally the time to cool down to operating temperature
stays nearly the same by applying less power.
This leads to an optimised power dissipation making the modules ideal for applications under higher
ambient temperature conditions, such as handheld or bench top systems.
4
standard TEC
new TEC
Power [W]
3
2
1
0
-60
-50
-40
-30
-20
-10
0
10
20
Temperature [°C]
Typical power consumption of an H50 VITUS SDD, comparison of the new TEC with the standard TEC
The new Peltier will be used in all TO8 packaged SDD modules. All new H7/H20/H30 and H50
vacuum type detectors will be equipped with the power optimised TEC.
Rev. 0
Information furnished by KETEK is believed to be accurate and reliable.
However, no responsibility is assumed by KETEK for its use, nor for any
infringements of patents or other rights of third parties that may result from its
use. Specifications subject to change without notice. No license is granted by
implication or otherwise under any patent or patent rights of KETEK.
Trademarks and registered trademarks are the property of their respective
owners.
KETEK GmbH, Hofer Str. 3, D-81737 München, Germany
Tel: +49-(0)89-67346770
Fax: +49-(0)89-67346777
www.ketek.net
©2011 KETEK GmbH. All rights reserved.
KETEK Application Note TEC
20
10
standard TEC (700mA)
standard TEC (900mA)
new TEC (700mA)
0
Temperature [°C]
-10
-20
-30
-40
-50
-60
0
50
100
150
200
250
300
350
400
Time [s]
Typical cool down time comparison for an H50 VITUS SDD equipped
with standard TEC (700mA and 900mA TEC current step response) and new TEC (700mA TEC current step response)
Rev. 0
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KETEK GmbH
KETEK Application Note TEC
Specifications
Parameter
Voltage
Current
Voltage
Current
∆T
Conditions/Comments
-35°C operating temp @ 20°C heat sink temp.
-35°C operating temp @ 20°C heat sink temp.
maximum cooling @ 20°C heat sink temp.
maximum cooling @ 20°C heat sink temp.
maximum cooling @ 20°C heat sink temp.
Min
1.6
250
3.0
600
Typ
1.7
300
3.3
650
75
Max
1.8
350
3.6
700
Unit
V
mA
V
mA
K
Absolute Maximum Ratings
Parameter
Peltier voltage
Peltier current
Stresses above those listed under Absolute
Rating
3.6V
700mA
Maximum Ratings may cause permanent
damage to the device. This is a stress rating
only; functional operation of the device at these
High currents may overheat the module,
or any other conditions above those indicated
leading to a worsened cooling performance of
in this application note is not implied. Exposure
the module. This can lead to performance
to absolute maximum rating conditions for
degradation of the SDD.
extended periods may affect device reliability.
ESD Caution
ESD (Electrostatic Discharge) sensitive device.
Charged devices and circuit boards can discharge without
detection. Although this product features patented or proprietary
protection circuitry, damage may occur on devices subjected to
high energy ESD. Therefore, proper ESD precautions should be
taken to avoid performance degradation or loss of functionality.
Rev. 0
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KETEK GmbH
KETEK Application Note TEC
Revision History
11/05 – Revision 0: Initial Version
Contact
KETEK Headquarter Sales Office
KETEK GmbH
Hofer Str. 3
81737 München
Email
[email protected]
Phone +49 (0) 89 673467 70
Fax
+49 (0) 89 673467 77
www.ketek.net
Rev. 0
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KETEK GmbH