TGP-651 Micropelt, TGP-651 Datasheet - Page 6

• Manufacturer Part Number: TGP-651
• Description: Power Management IC Development Tools THIN FILM THERMOGENERATOR
• Manufacturer: Micropelt
• Type: Energy Harvestingr

Specifications of TGP-651

• Rohs: yes
• Product: Prototype Products
• Tool Is For Evaluation Of: MPG-D651
• Output Voltage: 60 mV/k
• Description/function: TGP-651 is a packaged thermogenerator, which offers the superior performance of Micropelt's thin film generators in a standard package concept. TGP-651 is the most cost efficient thermal generator solution for many applications.
• Dimensions: 15 mm x 10 mm x 9.3 mm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: 0 C

TGP-751 / TGP-651
2.
2.1
A typical thermal energy harvesting application con-
tains a hot side surface and a heat sink (HS) in ambient
air as cold side. In between the TGP generator is
“sandwiched” and a heat energy (Q) is floating.
The output power of a thermogenerator depends on
the amount of heat energy floating through the device.
This is represented by the temperature difference di-
rectly over the thermogenerator, which depends on its
thermal resistance,. This can be described by a thermal
resistor network (equivalent to Ohm’s law for voltage,
current and electrical resistance).
The effective (net) temperature difference (Delta-T)
over the TGP is determined by:



Gross Delta-T = T
Thermal resistance TGP: R-th
Thermal resistance heat sink: R-th
T
HOT
Electrical parameters
Thermal path and heat sink
[K]
Network diagram for thermal system
Typical energy harvesting application
Heat source
Rth thermal resistance in K/W
DT
Heat flux Q
R-th
TGP
HOT —
TGP
Heat flow Q [W]
TGP generator
DT
T
COLD
R-th
hot-cold
TGP
HS
HS
Heat sink
T
COLD
[K]
The net Delta-T (DT) over the TGP can be analyzed as:
The larger the heat sink, the smaller the R-th
therefore the more heat energy (Q) is floating through
the TGP, resulting in a larger, net delta-T over the TGP.
Clear and brief:

The TGP-751 has a larger active area, than the
TGP-651, hence TGP-751 is better suited for applica-
tions, that require:


Operation optimum of a thermal system is when:

Therefore the higher output power capabilities of the
TGP-751 can be measured when using a larger heat
sink.
Performance results are given in 2.2 and 2.3:


a larger heat sink result in more output power
for the TGP
maximum output power
Operation from very small temperature
gradients
mal solution. This is important for thermal systems
that don’t interface to ambient air, like an applica-
tion where the TGP is mounted between two pipes
carrying hot and cold fluids.
and different practical heat sinks in
ambient air at a temperature of 25 ºC.
2.2: TGP component level, independent from a ther-
2.3: TGP in practical application with a hot source
Delta‐T
Micropelt - preliminary - Datasheet TGP v2.3 | Page 6
R-th
ThermoGenerator-Package
TGP
TGP
= R-th-
HS
*
HS
and