Part Number: TPS54531
Tool/software:
Hi,
Please review the schematics attached and kindly verify the compensation circuit , And share your valuable feedbacks.
Best Regards
Akin
Part Number: TPS54531
Tool/software:
We kindly request the thermal modeling data and power dissipation characteristics for the component TPS54531, including clarification on whether their thermal models are of the 2R type or lumped model type.
Part Number: TPS54531
Tool/software:
Hello,
Should the thermal vias for this design be filled or not filled?
I have seen some thermal vias on power pads which have a custom solder stencil which does around the vias. This footprint specifies the solder stencil over the thermal vias. Does this not allow solder to be wicked into the via?
I am hoping to avoid having to fill the vias to save cost on the PCB fabrication.
Thanks,
Dimitri
Part Number: TPS54531
Tool/software:
Hi,
Am I correct in understanding that the simulation tool that Ryan-san is referring to in the following thread is Webench?
If it's a different tool, would you be able to provide it?
Best Regards,
Nishie
Part Number: TPS54531
Tool/software:
Hello, I have a power supply design with the schematic as below using IC TPS54531DDAR. I have 2 power options, one of which is power from a 12VDC adapter via a TPS54531 for 5VDC output. The other is 5VDC backup power from the battery. Both are connected to the load and controlled through a P-channel mosfet. When the adapter loses power, the system will switch to the battery. But there is a problem: when the system runs on battery (loses power adapter), there will be a leakage voltage (~3.6V) running back from the output through TPS54531 to the VCC_12V input side. This voltage is not small and I haven't found a way to handle it. Do you have any suggestions? I was thinking of using a diode at the output of the power Ic but it will reduce the system performance.
Part Number: TPS54531
Tool/software:
Hello.
I made a typical diagram as indicated in the documentation:
In my circuit, I increased the output voltage by 0.6V to level out the voltage
drop across the output diode (VD12 in my PCB).
In this design, at a current of 3 amperes, the circuit can heat up to 80°C, and at 5 amperes, up to 104°C.
L1, AV2 and VD4 in my circuit heat up the most. The output voltage under load has a high-frequency ripple in the 1V range.
When the current exceeds 5A, the microcircuit does not go into protection.
Please tell me, is this normal mode of operation of the circuit?
What could be causing such intense heating?
Part Number: TPS54531
Tool/software:
Hello TI forum members,
I needed some help regarding usage of a catch diode part in my design for converting 24V input to 5V output with 5A max output and 4A nominal output current. The part being used is TPS54531DDAR
For the catch diode, which is connected to PH pin w.r.t Ground, I want to use this particular Schottky diode CR4 in design part number MBRB20200CTT4G from On semi, considering its forward current rating and low thermal res for junction to ambient
But looking at its forward voltage drop of 0.7 to 0.8V at 4A current, I am slightly hesitant to use this as it my cause the PH pin of this part having max neg voltage rating of -0.6V.
Can you please let me know if I can go forward using this Schottky diode part from On semi (MBRB20200CTT4G)
Part Number: TPS54531
Hi
We have apply TPS54531 sample as below.
May I know it before PCN PCN# 20231222000.1A or after? thank you!
Jeff
Part Number: TPS54531
Hi there,
I want to calculate the input current of the device TPS54531 for the Input voltage 6.1V, output voltage is3.3V, since the efficiency is not clear, please let me know how to calculate it?
Part Number: TPS54531
Hello,
We are having sporadic startup issues with a design that implements a TPS54531, this design takes 5V to 3.3V with an average load of ~2A.
Cin = 9.4uF (x2 4.7uF in parallel) ; Css = 8.2nF ; Rcomp = 51.1k ; Ccomp = 820pF ; Ccomp2 = 15pF ; L = 3.3uH ; Cout = 200uF
The startup wave form will ramp as expected up to 3.3V then after a short period of time (~1ms) the output of the regulator becomes unstable and starts oscillating between ~2V and ~3V every 500ms or so.
If I change the L to 2.2uH from 3.3uH then everything functions as expected, all else remain the same. Using web bench set to balanced I get the following bode results:
Low F gain Cross F Phase Marg. Gain Marg Inductor Val
29.83 dB 24.02 kHz 47.09 deg -17.11 dB 3.3 uH
29.98 dB 26.82 kHz 54.99 deg -17.39 dB 2.2uH
Is there something we are violating by using the 3.3uH inductor? We are seeing the failure in roughly 5% of the boards that come off the line.
Thanks,
Brian