Hi User,
You are likely not passing detection. Also, your bob smith termination is missing the 0.01uF capacitors on each pair, so there is leakage current moving through R73 & R74.
See the bob smith termination on TPS23751EVM-104 for an example…
Thanks Tom,
My outputs are 5V, and +/-15V, so a bit unusual.
I have ordered the TPS23751EVM-104, so will experiment with a custom designed transformer.
One other Question: My loading will vary between about 11W and 17W, depending on the features in use…
Hello Kevin,
Thank you so much for your question. So to reiterate, you don't want to use PoE at all on the front end, you want to inject 48V DC and then convert that voltage to a 12V output (isolated).
In TI terms, we would call that using an 'adapter…
Hi na na,
If small solution size and minimum components is needed, why not consider TPS23751EVM? This is 5V/5A solution that support 24V adatpers. It is a self-driven flyback so you don't have extra bulky components like a gate drive transformer in the…
Hi Namith,
Sorry for the delay:
1. To design for a lower voltage adapter, I would start from section 2.2 of this app note: www.ti.com/.../slva305c.pdf and work your way forward.
2. In the TPS23751EVM-104 board, the gate driver transformer is packaged…
Hi Lanjie,
The dimensions of the thermal pad should be shown on the figure on page 50 of the datasheet I linked to (seen below).
What’s more important than the mechanical dimensions of the pad is the layout footprint of the IC on the PCB since that is…
Other Parts Discussed in Thread: TPS23751 , TPS23752EVM-145 , TPS23751EVM-104 , TPS23752 Our customer is interested to TIDesign PMP9013 but I think they may not be able to buy this design.
Regarding test result of PMP9013 , this design is used TPS23751. What…
Other Parts Discussed in Thread: TPS23752 , TPS23754EVM-383 , TPS23751EVM-104 , TPS23752EVM-145 , TPS23754 , TPS23751 , TIDA-00617 Hi,
We plan to directly re-use the TI's TPS23752 PoE DC-DC converter circuit to one of our internal reference design. We really…
I have the same requirements. Can I remove the R30 in TPS23751EVM-104 for always in VFO mode? is there any power limitations for VFO mode(my power consumption is about 7W(5V 1.4A))?
Since I meet a strange situation, the TPS23751 switch VFO/PWM mode frequently…
TPS23751EVM-104 was designed with an extra circuit to reduce the natural hysteresis occurring between PWM and VFO (and VFO-PWM) modes using the Q8/R40 components below. This was done for efficiency "dead spot" reasons. If you want to tweak this…