JAJSJT8C May 2020 – June 2021 TPS543620
During soft start, the converter operates in discontinuous conduction mode (DCM) during the first 16 PWM cycles. During this time, a zero-cross detect comparator is used to turn off the low-side MOSFET when the current reaches zero amps. This prevents the discharge of any pre-biased conditions on the output. After 16 cycles of DCM, the converter enters FCCM mode.