Now customer want to use timing resistor to set TPS54388 operating frequency, but we find the Fsw accuracy is as below(20%) at 500kHz(Typ).
Customer application require to set above 1.7MHz operating frequency, so they want to set Fsw=2MHz(typ). Fsw will be 1.6MHz~2.4MHz from above information.
Customer can’t use external clock, because the EMC issue.
Could you help to verify:
1.The 20% tolerance is the worst case value?
2.Could you provide the test data and calculation method(tolerance)?
3.If we set Fsw=2MHz(typ), do you have some method to guarantee Fsw can’t goto 1.7MHz below?
