The MSP430 family chips are designed to be a low power controllers. This fact allows designers to use all kinds of energy harvesting technologies to keep the controller powered for long duration.
One of the emerging technologies involves the usage of the Seebeck effect – where certain materials under the effect of heat can generate an electric current that is proportional to the temperature difference between the hot and cold side. Although this effect has seen a lot of use in conceptual phases and designs, there has not been much practical use of the effect.
TI’s TIDA-00246 application note gives a detailed description on how to harvest heat using a commercial TEG generator with a MSP430FR5969 Launchpad. The design uses the BQ25570 power management IC to supervise harvesting and battery charging duties. It takes in a TEG generator designed by Marlow Industries – The EVERGEN® POWERSTRAP that attaches to objects such as pipes and stacks with high heat content.
The design uses a MSP430FR5969 in LPM4.5 which is deep sleep. A TPL5100 times wakes up the MSP430 every 17 minutes.
The design application gives you access to schematics, code as well as test data to get you started.
- Generic nergy Harvesting Adapter Module for TEG – TIDA00246.
- Marlow Industries Energy Harvesting TEG Power Strap White Paper.
- BQ25570 – Ultra Low Power Harvester Power Management IC with Boost Charger.
- TPL5100 – Nano Power Programmable Timer with Power Gating Functionality.
- MSP-EXP430FR5969 Launchpad.