Other Parts Discussed in Thread: LM5175
Hello,
I am looking into TIDA-050017 reference design together with TIDUCA8 to control my TEC element for cooling application and I am having some trouble understanding the current flow.
What I have:
- TEC is rated at 128.7W, 13.1A, 15.7V
- Vin = 12V from Lab Power Supply
- IC: LM5175
- How I connect my TEC: Vin ----------------------- +[TEC]- ---------------------Vout
What I understand: according to the appnote, if I want to cool the TEC down, my Vout has to go to 12V+15.7V=27.7V and source current.
If so, how does the current flow through the TEC if my Vin is also sourcing the current? and how do I calculate the current through the TEC?
Side question: If I want to control 4 TECs of the same kind, can I get it done by connecting 2 TECs in series (Vdrop = 15.7*2 = 31.4) and use 1 cooling circuitry for each pair?