TPS1663: Bidirectional switch connecting the eFuse devices

open-af

Part Number: TPS1663
Other Parts Discussed in Thread: TPS2663, LM5069, TPS2595

Tool/software:

Hi there,

I'm planing on building a bidirectional switch which can operate at from 5 V to 48 V and 5 A. The circuit should be as small as possible and take up as little space as possible. I have read the document SLVA948 and have questions about it.

1. Are there any reasons not to install the TPS1663 in a back to back configuration?

2. Is there any reason to prefer the common drain configuration? I actually think the common source would be better, because the parasitic diode in blocking direction (when it's off then no voltage is on the common connection).

3. Is there maybe a full integrated IC which can operate bidirectional at 48V and 5 A?

Thanks and best regards.

over 1 year ago

0 Amrit Jit over 1 year ago

TI__Mastermind 32781 points

Hello User,

Thanks for reaching out to E2E.

Please check TPS2663 which has back-to-back FET configuration.

Thanks\

Amrit

0 open-af over 1 year ago in reply to Amrit Jit

Prodigy 10 points

Hello Amrit,

Thanks for the quick response. I think the TPS2663 does not meet my needs. I want to use the eFuse features in both current directions. Measuring the current with IMON would be possible only when the current flows form IN to OUT, right?

Actually my plan was to pack the TPS1663 back-to-back like this:

But I am unsure what consequences would it have if I pack them with common source together. have you any thouts on that?

Regards

0 Amrit Jit over 1 year ago in reply to open-af

TI__Mastermind 32781 points

Hi,

The other options are external FET based hot-swap controller solution. You can connect high voltage controller LM5069 like Figure 24 in https://www.ti.com/lit/ds/symlink/lm9061-q1.pdf to achieve bidirectional overcurrent protection.

Best Regards,

Rakesh

0 open-af over 1 year ago in reply to Amrit Jit

Prodigy 10 points

Hi,

please don't understand me wrong. I do not search for another solution. I'd like to know if it's possible to use the TPS1663 in back-to-back configuration like the TPS2595 in SLVA948 document.

Regards

0 Amrit Jit over 1 year ago in reply to open-af

TI__Mastermind 32781 points

Hello,

Sorry for the confusion. Yes. you can use TPS1663 in back-to-back configuration for bi-directional use as shown in the app note.

Thanks

Amrit

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TPS1663: Bidirectional switch connecting the eFuse devices