Hi! I am currently updating a driver/controller solution for a TEC. The current design consists of an H-bridge, a buck DC/DC-controller and a digi-pot. The digi-pot sets the output voltage of the buck controller, and the H-bridge switches the polarity of the applied voltage to the TEC. The entire system design uses +5 and +12V for power supply.
This design has several weaknesses, the first being that it requires three ICs to control the TEC. If possible I would like to replace the solution with fewer ICs to reduce complexity. Furthermore the TEC can be run with up to +24V, but it was earlier deemed that +12V was enough to achieve the required thermal performance. This is not the case anymore.
I would therefore like to at the very least upgrade the buck controller which currently regulates the +12V down to lower voltages to some form of boost regulator, which should be able to regulate the +12V between 0 - 16V at least, with a current requirement of at least 6A. If this boost regulator could be controlled via PWM or some other form of communication from an MCU that would also be extremely useful.
If all three ICs could be replaced by something like a DRV595, but with a voltage boost functionality as well as higher current output, that would be optimal.
Thanks for any replies
