TGP-751 datasheet(28/35 Pages) ETC2

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Micropelt - preliminary - Datasheet TE-CORE /RF v1.4 | Page 28

Thermoharvesting Wireless Sensor System

Micropelt TE-CORE /RF

5.7 Power Budget Simulation

The right part of the “Power Budget Simulation” win-

dow is dedicated to configure and simulate a virtual

load, which should be powered by the thermogenera-

tor. This can be a real or just a conceived wireless ap-

plication with specific power consumption and duty

cycle parameters. These parameters are entered into

the respective fields under “Load Settings”. The calcu-

lation concept of this function assumes that

Duty Cycle = Sleep Time + Active Time.

Based on the known duty cycle specifications the first

part of the “Power Budget” is displayed as “Average

Power Demand”. This answers the first of two essential

questions:

How much power does my system consume on average?

The final question is: Does the thermogenerator supply

enough power to run my system sustainable ?

“Power Balance” Simulation

“Power Balance” with good margin

“Power Balance” near zero margin

Negative “Power Balance”: Charge indicator turns red

when load is connected

The “Power Balance” answers this question by sub-

tracting from the “Generated TGP Power” the

“Average power required“ by the virtual wireless sys-

tem. Any positive value means there is more power

generator than is required by the application. Hence,

continuous operation is possible.

If the “Power Balance” is negative, the attached system

will draw the difference from the energy storage. The

charge level indicator bar will turn red as soon as the

load is connected to the “Energy Storage”.

The thermal situation of the thermogenerator must be

considered carefully, e.g. by checking the histogram:

The Power Budget should be positive under all operat-

ing conditions and use-cases. With a sizeable energy

storage, though, it is possible to bridge supply gaps.

TGP-751 Datasheet(PDF) 28 Page - List of Unclassifed Manufacturers