TGP-751 datasheet(18/35 Pages) ETC2

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Micropelt - preliminary - Datasheet TE-CORE /RF v1.4 | Page 18

Thermoharvesting Wireless Sensor System

Micropelt TE-CORE /RF

Solder pads J1 and J2

connection for heat flux

direction (standard de-

livered)

Solder pads J1 and J2

connection for reversed

heat flux direction

4.3 Connection to hot source

The best method to connect the TE-CORE /RF to a hot

source is:



Magnetic surface - in this case simply use the mag-

net on the reverse side from TE-CORE /RF



None magnetic surface - use the enclosed self-

adhesive magnetic disks to connect to the hot sur-

face. Just remove the protector foil from the self-

adhesive magnetic disks and connect to the warm

surface.



With bolts a firm connection is achieved between

the thermal input and the hot source. Attach bolts

though the isolated rings of the Energy Harvesting

module.

Thermal compound (paste) must be used between

the hot source and thermal input of the TGP

Thermal and Mechanical information

Use thermal compound (paste) between the hot

source and thermal input of the TGP, in order to

achieve a good thermal performance !

4.1 Heat sink and Convection

Both positioning and orientation of the TE-CORE /RF

are of major importance for the harvesting yield. The

orientation of the heatsink and its fins relative to the

heat source and the direction of natural or forced con-

vection deserve special attention.

Please avoid placing the TE-CORE /RF in horizontal ori-

entation on top of a heat source. This will minimize the

effective temperature differential. Prefer a mounting

position on the side or underside of a heat source.

A forced air flow along the heat sink fins, e.g. from a

motor fan or ventilator, usually maximizes power re-

Heat sink orientation matters!

Due to the uni-polar design of the TE-CORE /RF, a

manual polarity option is provided. Solder pads are

available on the bottom side of the PCB (J1 and J2), by

which the polarity can be determined.

4.2 Polarity and heat flux direction

Along with a change of the heat flux direction, the po-

larity of the TGP’s output voltage inverts.

Standard setting of TE-CORE /RF : the thermal input is

the hot side and the heat sink is the cold side or room

temperature.

Standard heat flux

Reverse heat flux

thermal paste

heat sink

heat source

thermal radiation

Magnet



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