Part Number: TPS56C215
Other Parts Discussed in Thread: TINA-TI,
Tool/software: TINA-TI or Spice Models
Hi,
My customer is simulating the TPS56C215 running in DCM using TINA, and noticed that the inductor current in their simulations goes negative even though it should be operating in discontinuous mode (see below). There is also an increase in Vout followed by turn-off until it reaches the regulation voltage. Can you please share some detail about these behaviors? Shouldn't the low-side FET turn off when it senses inductor current reaching 0A? I have attached their simulation (it has a relatively small inductor to cause the negative current, but it happens with larger inductance as well).
Thanks,
Antonio
