TPS22996: Schematic Review

Prem Kumar

Part Number: TPS22996

Tool/software:

Hello,

Please review the following Schematic and suggest necessary changes required. The Load Switch is used for powering SFPs and QSFPs. Is this part compatible to be used for the given application?

20 days ago

0 Arush Gupta 13 days ago

TI__Mastermind 22470 points

Hi Prem,

I looks little wrong. Can you answer following question.

If you turn ON pin voltage low, won't the Vbias will also go low. I don't think you want this. In normal application, you want the load switch to remain powered and cut-off the path from IN to OUT.

Can you check this once.

Best Regards,
Arush

0 Prem Kumar 13 days ago in reply to Arush Gupta

Prodigy 95 points

Hello Arush,

We have connected VCC_3V3 to both VIN1 and VIN2 and the VOUT1 and VOUT2 are powering separate SFP/QSFP connector.
We won't be turning "ON" pin low at any time during the application. We want the load switch to turn-off the connection between VCC_3V3 and VOUT1/2 at any short conditions caused by the external SFP/QSFP connectors.
Please review the schematic for the application specified.

Regards,
Prem Kumar

0 Arush Gupta 13 days ago in reply to Prem Kumar

TI__Mastermind 22470 points

Hi Prem,

Understood your requirement but this leads to another question.

TPS22996 do not have short-circuit protection. Can you check if any of the following suits your requirement. Please do check current rating of them.

https://www.ti.com/power-management/power-switches/load-switches/products.html#1498=Catalog%3BAutomotive&2192=Short%20circuit%20protection&

Best Regards,
Arush

0 Arush Gupta 13 days ago in reply to Arush Gupta

TI__Mastermind 22470 points

TPS22996 will provide thermal shutdown if that is the only feature you need. In case of slow overload, that should be able to protect the device but if there is very high current due to sudden short, the load switch itself can get damaged.

Best Regards,
Arush

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TPS22996: Schematic Review