Looking for replacement of TOP223P in non isolated buck converter

Posted by: d.schouten on 10/03/2018

Hi all,

For some years we are using the TOP223P in a non isolated DC-DC buck converter design. The output power is only 3 - 5W, the input voltage range is 30 - 200Vdc and the output voltage is tuned to around 20Vdc. This design is based on PI's first Design Idea (DI-1, as attached to this message).

The TOP223P currently has a NRND status, so we are considering to redesign the board a little bit and implement a newer PI part. My question is, which newer PI part(s) are the best replacements in this application?

Thanks in advance for your feedback!

Dan

Files

Topswitch_buck_1.pdf (349 KB)

Comments

Hi Dan,

Thank you for considering Power Integrations for your power supply application.
The suggested alternative for TOP223P is the TOP-JX family of ICs.

https://ac-dc.power.com/products/topswitch-family/topswitch-jx/

Best Regards,
PI-Kryten

Hi Kryten,

Thanks for sharing an alternative for the TOP223P.
Do you think the JX series can also be used in a non isolated buck dc-dc configuration, similar the earlier attached design note?

Thanks in advance!

Hi,

Yes you can

Regards,
PI-Kryten

Great. Thanks!