Other Parts Discussed in Thread: TPS40210, , LM5156
Dear Representative,
I'm planning to design automotive DC/DC with the next characteristics: Vin: 9-36VDC, Vout=195VDC, Iout=0.1A, Temperature range: -40..+70.
Before this design started, we got sample of fly-back DC/DC based on TPS40210 from our client. The most important problem - is transformer, which has T=63C with 25C ambient.
So I deceded to do redesign of that DC/DC to reduce significantly temperature of transformer.
According to what Webench offered I choose LM5156-Q1. But there are some questions:
1. Will be LM5156 efficient for parameters I described above?
2. After quick preliminary design in Webench, the tool show alert like: "Phase margin is too low: 0 degree < 35.0 degree. This may lead to unstable design. Sorry, we don't have auto compensation enabled for this device. You
may still manually update compensation components or optimize the design" - so is it critical or it can be corrected?
3. May be you can advise another IC or topology for that DC/DC if LM5156 is not good for the task?
Thank you!
Sergej.
