WEBENCH® Tools/UCC256303: Can I change the "UCC256303 SIMPLIS Model" to output 48V/10A,which component do I need to modify?

JansonWu

Part Number: UCC256303

Tool/software: WEBENCH® Design Tools

Hello all,

Can I change the "UCC256303 SIMPLIS Model" to output 48V/10A? If i only change the transformer ' turns ratio,the transient result was wrong.So ,how can i change the SIMPLIS Model?

over 5 years ago

0 Mike O' over 5 years ago

TI__Guru* 86266 points

Hello,

Did you adjust the feedback resistor divider that controls the output voltage?

Regards,

0 JansonWu over 5 years ago in reply to Mike O'

Prodigy 90 points

Which values do I need to adjust?

0 Mike O' over 5 years ago in reply to JansonWu

TI__Guru* 86266 points

Hello,

You should be R23 to get the correct output voltage. Vout = VREF*R23/(R23+R4). I believe VREF should be 2.5V.

R23 = Vout*R24/(Vref-Vout).

Regards,

Mike

Power management

Power management forum

WEBENCH® Tools/UCC256303: Can I change the "UCC256303 SIMPLIS Model" to output 48V/10A,which component do I need to modify?