UCC2897A: Design tool question for UCC2897A

Jimmy Lai

Expert 6845 points

Part Number: UCC2897A

Dear Team,

I have some questions listed below, could you please ask your internal? Thanks

How to get Rslope? If the Rslope is obtained from the following formula please to ask how to set dVL/dt and m?

Many Thanks,

Jimmy

over 3 years ago

0 Steven Mappus1 over 3 years ago

TI__Mastermind 33115 points

Jimmy,

UCC28977A data sheet: dVL/dt is the measure of downslope of the output inductor current waveform

UCC28977A data sheet: m=1 for a conservative starting point:

SLUA535A Application Note: How to calculate UCC2897A, Rslope

Regards,

Steve M

0 Jimmy Lai over 3 years ago in reply to Steven Mappus1

TI__Expert 6845 points

Hi Steve,

We appreciated your great support!

We would like to modify the circuit to make 36Vin workable, what parameters should I change? The best is to give me a modified design tool with updated parameters.Another question is how to set Ncs that apply to our circuit? Thanks so much.
The transformer spec. as follows
1.Np=16
2.Ns=8
3.Lm=100uH

Could you help to review the schematic as below?

UCC2897(Current desgn).pdf

Many Thanks,

Jimmy

0 Steven Mappus1 over 3 years ago in reply to Jimmy Lai

TI__Mastermind 33115 points

Jimmy,

Download the UCC2897A Design Tool and set up your converter for 36V operation. You can also run a Webench sim and I would also recommend using TI Power Stage Designer.

Steve

Power management

Power management forum

UCC2897A: Design tool question for UCC2897A