LM5156H: is there design reference for DC/DC boost power board for DC 12V input and 120W+ output for 8 port PoE-PSE box（8x 802.3af） application

Jasper Ni

Part Number: LM5156H
Other Parts Discussed in Thread: LM5155

Tool/software:

Hi TI team，

I am looking for DC/DC boost power module or solution that support DC 12V input and 120W+ output（48V*2.6A） for a 8 port PoE-PSE box（8x 802.3af） application, so will you recommend any TI's boost IC for designing for that senario？

To say the least, two power module separately output 60W+ could be combined to provide 120W+ capability is an alternative solution, and is there any boost ICs or reference design is available. isolation solution is better from safety consideration.

Thanks!

Jasper

20250711

2 months ago

0 Mounika Girish 2 months ago

TI__Intellectual 2426 points

Hi Jasper,

Thank you for using e2e forum.

Please allow me sometime to check here for reference design, I can reply you latest on Monday,

You are looking for a flyback solution at the PoE PSE end? for 12V input and 120W output power?

Thank you for your understanding and patience.

Best regards,

Mounika

0 Mounika Girish 2 months ago in reply to Mounika Girish

TI__Intellectual 2426 points

Hi Jasper,

I wanted to confirm if you need Boost or flyback device.

If Boost then please check out our - https://www.ti.com/product/LM5122 device

In case of Flyback, https://www.ti.com/tool/PMP22764 attaching the reference design with LM5155 in flyback topology for a 24-V input to isolated 56-V/1.25-A output.

Best regards,

Mounika

Power management

Power management forum

LM5156H: is there design reference for DC/DC boost power board for DC 12V input and 120W+ output for 8 port PoE-PSE box（8x 802.3af） application