Customer is are going to settle on 24V for system voltage.
Weblink for the TEC chip (http://www.kryotherm.ru/modulez/down.phtml?filename=/dir2attz/Frost-74.pdf)spec.
As you can see at dT=50C the voltage at 5A is 12V and at 3A it is 8V. From what I understand on the ADN8831 datasheet the “L” FETs operate in linear region either sourcing or sinking current. This is a problem in that the LFB pin is spec’d at 6V abs max. Making the power dissipation on the high side linear FET be: (24V – 6V) x 5A = 90W! when driving current in this direction.
Any suggestion possible options to drive higher voltage of 24V system voltage?