Other Parts Discussed in Thread: TPS56221
Hello everyone,
I have designed a 12V to 8V DC-DC converter using spec and circuit layout given for TPS56121. I calculated feedback parameters using Type 3 loop stability excel sheet. Unfortunately, I have no output signal so I can identify where is the problem!?! Any idea?
I have attached the circuit layout and schematic is as same as the data sheet. My PCB is 4 layers.
Thanks,
Babak