Other Parts Discussed in Thread: UCC2897A, TPS23881
Hi :
I already follow "www.ti.com/.../PMP21103" design product(poe splitter).
- IC:TPS2373+UCC2897A)
- Isolation mode/Class8/ DC 12V output
And our Taiwan TI agent "ARROW" FAE already review circuit OK.
After Sample Run. Poe splitter function not correct.
Although I have provided to ARROW's FAE debug, But I still hope to understand
and expedite the resolution this problem.
Product status
1. If use PSE input (please see the circuit 02) VPP have 48V voltage.
But Vcout only have a few pulse voltage(very low). And LD1(TPL/TPH)always blinking.
2. 12V DC no any output voltage
(Give up PSE input) I try to use power supply provide DC power(please see circuit 04 & 05).
- point 01=DC 48V
- point 02=DC 12V
But still no any output voltage.
Could you please assist review the circuit?
Please see the below.
Thanks!
Caspar