TPS2400: How to clamp 12V/30A(max) supply rail

Kazuhiko Hirano

Part Number: TPS2400
Other Parts Discussed in Thread: LM25069, TPS24720

Hello,

Fujitsu is using 12V/30A(max) DC supply rail.
Since loaded devices absolute maximum input voltage is ~15V, they would like to clamp the 12V rail at 14V maximum. And they are thinking around if they can use TPS2400 to meet their requirements and have the following questions.

Q1:
Does TI think TPS2400 is the best device to meet the requirements?
If not, what else TI device would be the best?

Q2:
They are looking at Figure 2 of slva 163.pdf. What Q1 and Q2 does TI recommend in the figure 2 to meet their requirements?

Best regards,

K.Hirano

over 3 years ago

0 Rakesh over 3 years ago

TI__Guru** 103506 points

Hi Hirano,

Hot-swap controller like LM25069 or TPS24720 has overvoltage protection and are better suitable for this application.

Can you ask Fujitsu to look into those data sheets and get back for further inputs.

Best Regards,

Rakesh

0 Kazuhiko Hirano over 3 years ago in reply to Rakesh

TI__Genius 13158 points

Rakesh,

Thank you for your response.

Both LM25069 and TPS24720 can clamp the output voltage ~14V somehow, even if input voltage gets >15V?

Best regards,

K.Hirano

+1 Avishek Pal over 3 years ago in reply to Kazuhiko Hirano

TI__Mastermind 30915 points

Hi Hirano,

If the input voltage exceeds the OVLO threshold set by the resistor divider, the MOSFET is switched off by the 2 mA pull-down current at the GATE
pin, denying power to the load.

Clamping the output voltage may not be possible.

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

Power management

Power management forum

TPS2400: How to clamp 12V/30A(max) supply rail