I saw this press release where DCM was listed as a feature for a new Infineon driver chip.
I'm involved in LED driver design for Horticulture where DCM is undesirable.
In what case would DCM be desirable for any LED lighting application?
Or is DCM in reference to something other than the output to the LED? Still, if so, why is DCM desirable in any LED driver?
UPDATE: Why DCM is used in the power stage was answered in the comments. I still wonder if DCM is ever desirable in the output to the LEDs? This secondary question is not related to the linked AC powered LED driver.
Datasheet defines operating modes on Page 11 and has an appendix with definitions of related terminology.
Section 220.127.116.11 Other PFC Protections, mentions CCM.
Section 3.2 Flyback Controller Features, mentions DCM.
Datasheet: XDPL8221 Digital PFC+Flyback Controller IC