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Part Number: PMP11257
Hello, I would like to find a proper IC which replace under the full bridge rectifier in PMP11257, for saving the space on PCB.
Critical condition : Replaced IC should be applied to PoE architecture. (PAIR12, PAIR34 pin should be…
Hi Vivien,
Thanks for your patience.
CDB pin is an open drain pin (so does T2P). So it only has two status: High impedance or tie to RTN. It needs a pull up resistor to make its output between H/L.
PMP11257 ( https://www.ti.com/tool/PMP11257 ) is a reference…
Part Number: PMP11257 Other Parts Discussed in Thread: TPS2378 , TPS2372-4EVM-006 , LM76005 , , LM5145 , LM5116 In this design (11257), DEN resistor seems to be 27.4K, However Datasheet of TPS2378 states that TI recommends a resistor of 24.9K. Could you please…
Hi Neil,
For low-side switching Buck converter I think TPS23755 and TPS23758 have no difference.
PMP11257 ( www.ti.com/.../PMP11257) uses TPS2378 + LM5116 which is a synchronous Buck converter in PoE design. But it is discrete solution.
Best regards,
Di…
Hi Kazuya,
Thanks for your updates.
1. In most of cases, 12-V isolated adapter can be oringed on the secondary side. Checking https://www.ti.com/lit/an/slva306a/slva306a.pdf for more details.
2. About non-isolation design: most of PoE PD design relies on…
Hi Subin,
Yes, we have a reference design PMP11257 ( https://www.ti.com/tool/PMP11257 ) which uses TPS2378 and LM5116. It is a 12-V 2-A output design. You may configure it to 5-V but the efficiency may drop due to a larger step-down-ratio (from 57Vin-12Vout…
Part Number: TPS2378 Other Parts Discussed in Thread: PMP10812 , PMP11257 hi team,
do we have TPS2378 non-isolation solution reference design? or are there any special requirements for the downstream DCDC to co-work with TPS2378 for non-isolation solution…
Hello,
Please accept my connect request.
The TPS23755 can be used as a PWM controller only, but we do not have a 12V output reference design.
You could just remove the POE section of PMP11257: https://www.ti.com/tool/PMP11257
We do have other Buck 12V…
Hi Jamie,
For a non-isolated small size reference design with 12V/2A output please take a look at PMP11257.
Please let me know if you have any additional questions. Thanks!
Best Regards,
Brett Colteaux
PoE Product Marketing Engineer
