Question
Can the 4 bucks run at different frequency?
Answer
No. the 4 bucks would run the same switching frequency by external RT resistor
setting or synchronization with input clock.
However, additional pre-defined configurations are possible upon request and as
indicated in ADP5052 datasheet, Channel 1 and Channel 3 can be program to half
of master frequency set by RT pin. This will require a minimum quantity to be
ordered.