TGP-751 datasheet(14/19 Pages) ETC2

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Micropelt - preliminary - Datasheet TE-CORE v2.5 | Page 14

Thermoharvesting Module

Micropelt TE-CORE

Solder pads J1 and J2

connection for heat flux

direction (standard de-

livered)

Solders pad J1 and J2

connection for reversed

heat flux direction

4.3 Connection to hot source

The best method to connect the TE-CORE power har-

vesting kit to a hot source is by:



Magnetic surface - in this case simply to use the

magnet on the bottom side from TE-CORE Module



None magnetic surface - use the enclosed self-

adhesive magnetic disks to connect to the hot sur-

face. Please remove the protector foil from the self-

adhesive magnetic disks and connect to the warm

surface. In the next step set the middle of the TE-

CORE module above the magnetic disks.

For the best thermal connection from TGP to warm sur-

face you can use a thermal compound (paste).

Thermo Meets Electrics

4.1 Heatsink and Convection

Both positioning and orientation of the TE-CORE are

of major importance for the harvesting yield. The ori-

entation of the heatsink and its fins relative to the heat

source and the direction of natural or forced convec-

tion deserve special attention.

Please avoid placing the TE-CORE in horizontal orienta-

tion on top of a heat source. This will minimize the ef-

fective temperature differential. Prefer a mounting po-

sition on the side or underside of a heat source.

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

motor fan or ventilator, usually maximizes power re-

gardless of mounting position and natural convection.

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

polarity option is provided. Solder pad are available on

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

polarity can be determined.

This gets around the losses that a rectifier would intro-

duce but requires an engineering action to change the

direction of the heat flux.

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 is for the TGP TOP side to be the

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

temperature of the thermal path.

Standard heat flux

Reverse heat flux

thermal glue

heat sink

heat source

thermal radiation

Magnet

Heatsink orientation matters!



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