Fausto,
Let me clarify. I was referring to when both FETs are in the off state.
When the SSR circuit is "on", both FETs are on and current does conduct through both MOSFET (not body diodes). When the circuit is off, both FETs have the insufficient…
The optimal way to accomplish two isolated outputs would be to use an optocoupler feedback on the isolated output which has the highest power level. This would provide perfect regulation on that one output and reasonable regulation on the second (lower…
You do not need R3/R7 with the diff amp configuration. Connect the op-amp output to the FB input. Do not run the FB node long as this is a noise sensitive node and can create issue if not very short. Vout (total) should be 1.25V*(100k/3k) = 41.66V.
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Hi,
Yes, there will certainly be more TI Designs uploaded that will feature the LM5155 in SEPIC applications. This part is new, so it will take some time to create new designs and application material.
The challenge for your design will be to properly…
Larry,
PMP12072 was designed to switch at 60Hz, so a high speed turn off was not necessary. D2/C2 acts as a peak detector for the secondary side of the transformer. The voltage on C2 is likely staying charged because the D2 diodes are reversed biased…
I would recommend keeping the voltage at the VDD pin at 12V since that voltage creates the gate drive voltage on the transformer secondary side. Since you have 24V available, I suggest using a 12V zener diode (MMSZ4699T1) to clamp VDD to 12V. The value…
