WEBENCH® Tools/LM22672: high voltage modeling of the LM22672

Lucas Pucheta

Part Number: LM22672

Tool/software: WEBENCH® Design Tools

I’m planning on using the LM22672-ADJ but can’t seem to get this modeled in Web Bench. I’m planning on using this part at 12Vout with a Vin = 18V to 36V. Web Bench is trying to constrain me to use 5V as a max Vout but the datasheet says you can use this part at higher output voltages due to the adjustable nature of it. Can you provide some insight as to modeling this properly at 12Vout in Web Bench? Thanks in advance!

over 3 years ago

0 Marshall_Beck over 3 years ago

TI__Mastermind 29330 points

Looks to be issue with the model setup.

I will work to resolve with modeling team and if it can not be done quickly. I will create a design for you.

Please allow me a few days to get back to you.

0 Marshall_Beck over 3 years ago in reply to Marshall_Beck

TI__Mastermind 29330 points

Here is design calculator that can be used in forming the component selection for your design.

Please let me know if you run into any issues with the calculator tool.

https://www.ti.com/tool/LM2267X-22680DESIGN-CALC

0 Lucas Pucheta over 3 years ago in reply to Marshall_Beck

Intellectual 300 points

This is for a Housekeeping supply for a larger 650W isolated DC-DC converter. This Housekeeping supply provides 12V for driving the MOSFETs and running some other ICs. The expected current will likely be ~200mA or so, but I want to use the LM22672-ADJ since it’s already in our system. The spreadsheet you sent me will not allow me to model/use that part.

The input voltage is 18V to 36V. The LM22672-ADJ should work for this application, shouldn’t it?

0 Marshall_Beck over 3 years ago in reply to Lucas Pucheta

TI__Mastermind 29330 points

Design calculator is for LM22672 device.

Device is designed for your application.

Power management

Power management forum

WEBENCH® Tools/LM22672: high voltage modeling of the LM22672