TPS2663: PDU Design

Valentin Paderov

Part Number: TPS2663

I'm currently working on designing a PDU card that will be connected to a 28V/50A power supply. The PDU will be located 2 meters away from the power supply and will have 5x5A-protected outputs.

For this project, I was thinking of using the TPS2663 due to its compact size and its ability to block reverse currents. However, I have a few questions regarding its suitability for this application:

If a short circuit were to occur on one of the outputs, would the TPS2663 be able to block the DC2DC maximum current?
If I want the PDU card to meet MIL-STD-1275 requirements, would using the TPS2663 help me achieve this goal? And if so, what changes or modifications would be necessary?
Also, what about MIL-STD-461 compliance? Are there any considerations that I should keep in mind with regards to using the TPS2663?

Thank you for your time and I look forward to hearing your insights.

over 2 years ago

0 Kunal Goel over 2 years ago

TI__Guru* 78961 points

Hi Valentin,

Thanks for reaching out.

1. Yes it has short circuit protection.

2. I am not fully aware of MIL standards. But it looks to be passing surges and EMC/EMI related.

TPS2663 has :

If surge has voltage beyond abs max rating of eFuse then we will need TVS at input to clamp voltage beyond abs max rating of eFuse. We will also need some filtering circuits at in and out of eFuse for EMC/EMI.

You can also have a look at application section in datasheet.

Regards

Kunal Goel

0 Valentin Paderov over 2 years ago in reply to Kunal Goel

Prodigy 30 points

Thanks, Kunal Goel.

have a few follow-up questions:

Would you happen to know if TI has any application notes that can provide guidance on MIL-STD-1275 and MIL-STD-461 compliance?
The TPS2663 datasheet mentions the input RPP and PRB when using external FETs. However, I'm curious to know how the device will behave if reverse polarity voltage is applied to the output.
I'm also wondering if the TPS2663 has any indication or signal to let the user know when an input RP is applied to the IC.
Lastly, if I were to measure the input voltage of the eFuse using the MCU's internal ADC and take the measurement between the FET and IN pin, would the TPS2663 protect the ADC input of the MCU in case an input RP voltage is applied?