Webench symmetrical output smps

Panoss

Other Parts Discussed in Thread: LM5023, UCC28710, UCC28711

How can I design a symmetrical (±12 V) smps with Webench?
I don't see any option for symmetrical smps.
Can I do it in Webench?

over 10 years ago

0 Tommy Jewell - WEBENCH Design Center over 10 years ago

TI__Intellectual 2930 points

Hi,

The closest we have would be a 2-Output Flyback with the LM258x. You can do this while in WEBENCH by clicking the new button and then putting 12V out in the Vout 1 box and -12 Vout in the Vout2 box.

Best regards,
Tommy

0 Panoss over 10 years ago in reply to Tommy Jewell - WEBENCH Design Center

Prodigy 70 points

In WEBENCH I clicked the new button.
I put 12V out in the Vout 1 box
and -12V out in the Vout2 box.
I clicked 'show all recommended Power Management ICs".
I clicked "compare all part types".

Result: Solution found 3:
LM5023
UCC28710
UCC28711

LM258x does not appear in the solutions.

I click on LM5023 "Open Design" and shows me a design with one output only, the +12V.

0 Tommy Jewell - WEBENCH Design Center over 10 years ago in reply to Panoss

TI__Intellectual 2930 points

My apologies,

I did not realize you were doing an AC/DC design. The LM258x series is only enabled for DC/DC conversions. We are really just starting to enable our lineup of AC/DC parts in WEBENCH and have not yet done any multi-output topologies.

You may want to look at some reference designs for what you are doing and possibly some app notes.

A couple good places to start are listed below:

90V to 270V AC Input, -12V to +12V/3W Quasi-Resonant Flyback(12V @ 250mA):
http://www.ti.com/tool/pmp7263.1

Improving Cross Regulation of Multiple Output Flyback Converters:
http://www.ti.com/lit/an/snva562/snva562.pdf

Hope this helps

0 Panoss over 10 years ago in reply to Tommy Jewell - WEBENCH Design Center

Prodigy 70 points

Ok thank you very much!

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Webench symmetrical output smps