Part Number:TPS548B22
Hello TI,
We're using TPS548B22 as our DCDC Buck converter solution. Our customer and we have a question regarding the VBP voltage for MODE / VSEL / FSEL setting.
The VBP is 5.07V in normal operation so we are confused why you particularly listed down the Vdetect_th range that calculated with VBP = 2.93V?
We know the controller will detect the external resistor divider ratio during initial power up (VDD = 3 V and VBP = 2.9 V).
It means the table in datasheet page 7 only happens at the moment when BP starts rising from 2.93V to 5.07V.
It looks like an unusual way to get config and we even cannot control VDD / VBP rising time. Or the VBP would keep at 2.93V and wait for all config settle down?
Is it necessary to use different RES divider ratio to get the same target voltage on each pin as page 7 listed ?
Stan.