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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC4070 датащи(PDF) 13 Page - Linear Technology |
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LTC4070 датащи(HTML) 13 Page - Linear Technology |
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13 / 24 page  LTC3108-1 13 31081fa this manner, a Peltier cell is referred to as a thermoelectric generator (TEG). The low voltage capability of the LTC3108-1 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 LTC3108-1 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 LTC3108-1 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 Peltier cells are available in a wide range of sizes and power 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 Fujitaka www.fujitaka.com/pub/peltier/english/thermoelectric_power.html FerroTec www.ferrotec.com/products/thermal/modules 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 Kryotherm www.kryothermusa.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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