Other Parts Discussed in Thread: LM5148
Tool/software:
Dear All,
we are designing a power supply with the following features:
--> Vin= 48V (-10%,, +15%)
--> Vout= 21..30V (28V nominal)
--> Iout=15A max
Because we uses the LM5149 for the other power supply, we want to use this chip.
PRIMARY CHIP:
--> Active EMI filter: Yes
--> Vccx: connected to external +5V
--> Rcnfg: 71k5
--> Rt: 82k5
--> PFM/SYNC: to VDDA
--> FB: Diveder of Vout
--> SYNCOUT: connected to PFM/SYNC of Secondary chip
--> EXTCOMP: RC filter connected to GND
SECONDARY CHIP:
--> Active EMI filter: No
--> Vccx: conneted to external +5V
--> Rcnfg: 90k9
--> Rt: 82k5
--> PFM/SYNC: connected to SYNCOUT of Primary chip
--> FB: connected to VDDA
--> SYNCOUT: float
--> EXTCOMP: connected to EXTCOMP of Primary chip
--> INJ and SEN: connected to REFAGND
--> REFAGND: connected to GND
The main question is if these connections are right or I forgot something...
Then, in the Seconday chip, do I need to connect Vccx to external power supply even if I don't use the Active EMI filter?
Thank You and Best Regards
Federico Battaglin
