LM5122: Webench simulation question

Patrick Chen

Part Number: LM5122

Hello,

Below is LM5122 condition. But customer can not simulate by this condition on Webench. Has any problem for it? Does LM5122 support this power? Thank you.

Input:9~36V

Output:36V

Output Current 5A

Patrick

over 8 years ago

0 EricLee over 8 years ago

TI__Guru 53821 points

Moving to WEBENCH forum.

0 Flora Carreto over 8 years ago in reply to EricLee

TI__Intellectual 2510 points

Hello Patrick,

The desired design test conditions of

Input:9~36V, Output:36V,Output Current 5A

corresponds to a buck-boost converter and there is NOT WEBENCH solution.

If you make VinMin=VinMax-36V, Vout=35V, Iout=5A, there are several solutions and LM25085x are the highest ranked models.

Regards,

Flora

PS. Most WEBENCH solutions cannot reach Dmax=100% because our calculations include Rds(on), DCR, dead time and other losses

0 Patrick Chen over 8 years ago in reply to Flora Carreto

Mastermind 8875 points

Hello Flora,

Below is customer condition. They have power source 12V~24V. IOUT=2A. That could be simulate design. But while change IOUT 5A, we can get the it. Could LM5122 not support IOUT 5A while 12V~24Vin ? Thank you.

Patrick

0 Patrick Chen over 8 years ago in reply to Patrick Chen

Mastermind 8875 points

Hello

Have any comments for that? Thank you.

BR
Patrick

0 Mahantesh Chanagoudar over 8 years ago in reply to Patrick Chen

TI__Intellectual 1045 points

Hi Patrick,

We are looking into this. We will get back to you soon.

Best Regards,
Mahantesh

0 Mahantesh Chanagoudar over 8 years ago in reply to Mahantesh Chanagoudar

TI__Intellectual 1045 points

Hi Patrick,

For Vin=12V to 24V. IOUT=5A and Vout-=36V Webench is not creating the design because suitable FET is not present in the Webench database. However up to 4A you can create design for this condition.

Best Regards,
Mahantesh

Simulation, hardware & system design tools

Simulation, hardware & system design tools forum

LM5122: Webench simulation question