Hi Tommy,
Thanks for your reply.
Yes, you will need to change the transformer turns ratio. For 15V output, PRI:SEC = 2 to 3 : 1, AUX:SEC = 0.8 : 1 make VCC always below 16V.
Feedback loop resistor, output side capacitors, FET Vds rating voltage also need…
Hi Brandon,
Thank you a lot for your many supports.
Could I ask additional questions as the below? Q1. You said " In customers case here, since they wish to use primary side adapter OR'ing they need to use TPS23755 since the TPS23758 supports secondary…
Hi Hemal,
Thanks for reaching out!
On the PoE PD side, I would recommend you to using Option 3 as the circuit below to enable seamlessly PoE PD <-> adapter transition.TPS23731 is recommended for your case considering TPS23731 has EMPS that can automatically…
Part Number: TPS23734EVM-094 Other Parts Discussed in Thread: TPS23734 , TPS23731 , TPS23731EVM-095 , PMP22806 Hello,
TPS23734EVM-094 have been designed for evaluating the TPS23734 in a forward SMPS topology.
There is an existing (or in design) evaluation…
Part Number: TPS23731 Other Parts Discussed in Thread: PMP22806 , , PMP22477 Hii Team,
We want to give priority to DC Adapter when both POE and DC Supply [12V DC Adapter] present as a input supply source. We are using TPS23731 PD Controller in POE design…
Part Number: TPS23731EVM-095 Other Parts Discussed in Thread: PMP22806 Can TPS23731EVM-095 be modified to supply 12V?
Do we just modify based on PMP22806?
- Does T1 need to be different as well?
Hi Hemal,
Thanks for your patience.
Looks that you want seamless transition for both AUX->PoE and PoE->AUX cases. Meanwhile, the AUX priority should be higher than PoE.
I would recommend you to use TPS23731 if your target is Class-3 considering TPS23731…
Hi Subin,
Thanks for your diagram.
Looks like you will need a 12-V output from a PoE + DC/DC, and a Buck to transform 12V to 5V. >15 W is needed.
In that case, I would recommend you to use TPS23731. PMP22806 ( https://www.ti.com/tool/PMP22806 ) is a 12…
Hi Andrzej,
Thanks for reaching out!
PMP22806 ( https://www.ti.com/tool/PMP23278 ) is a 12-V output flyback converter reference design using TPS23731. PMP22806 with flyback uses primary side regulation (no optocoupler is needed in feedback loop), while TPS23278…
Part Number: TPS23731 Other Parts Discussed in Thread: PMP22806 , Hi all,
I have recently designed a DC/DC converter based on TPS23731 in flyback topology with primary side regulation and diode rectifier on the secondary side. The converter is intended…