Hello,
There are 2 contradicting descriptions for FPWM light load operation in the datasheet shown below. Which one of CCM and DCM is correct?
p.20:
8.4.3 Active Mode
• FPWM mode – light load operation: Discontinuous conduction mode (DCM) when the load current is lower
than half of the inductor current ripple
p.23:
8.4.3.3 FPWM Mode – Light Load Operation
In FPWM mode, frequency is maintained while lightly loaded. To maintain frequency, a limited reverse current is
allowed to flow through the inductor.
In FPWM mode, continuous conduction (CCM) is possible even if IOUT is less than half of Iripple.
Thank you.
Regards,
Oguri (TIJ automotive FAE)
