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| 型号： | LTC3108EDE#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.45 A SWITCHING REGULATOR, PDSO12 |
| 封装： | 4 X 3 MM, LEAD FREE, PLASTIC, MO-229WGED, DFN-12 |
| 文件页数： | 5/22页 |
| 文件大小： | 1300K |
| 代理商： | LTC3108EDE#PBF |
LTC3108
3108fa
this manner, a Peltier cell is referred to as a thermoelectric
generator (TEG).
The low voltage capability of the LTC3108 design allows
it to operate from a TEG with temperature differentials
as low as 1°C, making it ideal for harvesting energy in
applications in which a temperature difference exists
between two surfaces or between a surface and the am-
bient temperature. The internal resistance (ESR) of most
cells is in the range of 1Ω to 5Ω, allowing for reasonable
power transfer. The curves in Figure 2 show the open-
circuit output voltage and maximum power transfer for a
typical Peltier cell (with an ESR of 2Ω) over a 20°C range
of temperature differential.
TEG Load Matching
The LTC3108 was designed to present a minimum input
resistance (load) in the range of 2Ω to 10Ω, depending
on input voltage and transformer turns ratio (as shown
in the Typical Performance Characteristics curves). For
a given turns ratio, as the input voltage drops, the input
resistance increases. This feature allows the LTC3108 to
optimize power transfer from sources with a few ohms
of source resistance, such as a typical TEG. Note that a
lower source resistance will always provide more output
current capability by providing a higher input voltage
under load.
Peltier Cell (TEG) Suppliers
Peltiercellsareavailableinawiderangeofsizesandpower
capabilities, from less than 10mm square to over 50mm
square. They are typically 2mm to 5mm in height. A list
of Peltier cell manufacturers is given in Table 3.
Table 3. Peltier Cell Manufacturers
CUI, Inc.
www.cui.com (Distributor)
Fujitaka
www.fujitaka.com/pub/peltier/english/thermoelectric_power.html
Ferrotec
www.ferrotec.com/products/thermal/modules
Kryotherm
www.kryothermusa.com
Laird Technologies
www.lairdtech.com
Marlow Industries
www.marlow.com
Micropelt
www.micropelt.com
Nextreme
www.nextreme.com
TE Technology
www.tetech.com/Peltier-Thermoelectric-Cooler-Modules.html
Tellurex
www.tellurex.com
applicaTions inForMaTion
Table 4. Recommended TEG Part Numbers by Size
MANUFACTURER
15mm × 15mm
20mm × 20mm
30mm × 30mm
40mm × 40mm
CUI Inc. (Distributor)
CP60133
CP60233
CP60333
CP85438
Ferrotec
9501/031/030 B
9501/071/040 B
9500/097/090 B
9500/127/100 B
Fujitaka
FPH13106NC
FPH17106NC
FPH17108AC
FPH112708AC
Kryotherm
TGM-127-1.0-0.8
LCB-127-1.4-1.15
Laird Technology
PT6.7.F2.3030.W6
PT8.12.F2.4040.TA.W6
Marlow Industries
RC3-8-01
RC6-6-01
RC12-8-01LS
Tellurex
C2-15-0405
C2-20-0409
C2-30-1505
C2-40-1509
TE Technology
TE-31-1.0-1.3
TE-31-1.4-1.15
TE-71-1.4-1.15
TE-127-1.4-1.05
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