Hi Diang,
I have got the layout of PMP22806 by your mail, thanks.
Could I know that what is the function of D25(VSS-PGND) in PMP22806 schematic?
I don's see the diode in TPS23731EVM-095, but why we have this difference between PMP22806 schematic and TPS23731EVM…
Hi Kapil,
Thanks for reaching out!
1. VCC needs be > 9V normally to avoid UVLO. In a regular design, VCC is sourced by a transformer AUX winding and you do not need to use a LDO to source it.
2. Yes TPS23731 is good to use here. PMP22806 is a 12V design…
Hi Cameron,
You need to have a different transformer to change Vout = 5V to 12V. Normally 5V output transformer has Naux :Nsec = 2.4 : 1, and 12V output transformer has Naux : Nsec = 1:1. You can refer a 12V TPS23731 design PMP22806 via www.ti.com/..…
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?
