TPS23731: schematic check

Tommy Tzeng

Part Number: TPS23731

Tool/software:

Hi Sir,

as attached below, may we know there is something wrong with this schematic? after we check it, there seemed to be no problem.

we would like your help to check again, very thanks for you help and learn from you,

MIEAP-3220BE_NWA5090_C2_2025_0102_PoE-1.pdf

10 months ago

0 Diang Xing 10 months ago

TI__Mastermind 37111 points

Hi Tommy,

1. APDO is an open-drain pin. You can leave it NC if not needed.

2. Better to make R153 as 0805 or larger size. When pull DEN down, there will be a high-power consumption on R153.

3. It is not necessary to pull APD down to turn off the DC/DC since you already pull DEN to VSS to turn off the hotswap between RTN to VSS. You may not need the below circuit and only need tie APD to RTN.