TPS1HC100-Q1: Switch for USB hub

Sobin Sebastian

Prodigy 90 points

Part Number: TPS1HC100-Q1
Other Parts Discussed in Thread: TPS22950-Q1

This switch is for a usb hub TUSB4041-Q1

Please review the schematics, this switch is not working.

over 1 year ago

0 Shreyas Dmello over 1 year ago

TI__Mastermind 32650 points

Hi Sobin,

TPS1HC100 is an automotive high side switch that is meant for 12V automotive applications.

3.3V is not supportable for the device.

If a current limiting power distribution switch is required please take a look at our load switch portfolio here:

https://www.ti.com/power-management/power-switches/load-switches/products.html

I would look at devices like TPS22950-Q1. For best support on these devices, please ask a new question on e2e with TPS22950-Q1 tagged.

Thanks,

Shreyas

0 Sobin Sebastian 12 months ago in reply to Shreyas Dmello

Prodigy 90 points

Thanks for replying.

Are you saying we cannot switch 3.3V using this switch ?

0 Shreyas Dmello 12 months ago in reply to Sobin Sebastian

TI__Mastermind 32650 points

Hi Sobin,

This is not a 3.3V switch. 3.3V DC is not supported.

Thanks,

Shreyas

0 Sobin Sebastian 12 months ago in reply to Shreyas Dmello

Prodigy 90 points

Hello Shreyas,

I am a bit confused

In the datasheet screenshot mention above its says wide operating range from 3 to 28,What i thought was VBB of this IC can be 3 to 28V am i right ?

But it the recommended operating condition table

its 3.5 to 18

So i am confused.

Considering your suggestion it means VBB should be >>3.3V

+1 Shreyas Dmello 12 months ago in reply to Sobin Sebastian

TI__Mastermind 32650 points

Hi Sobin,

The wide operating range is to account for automotive transients like cold crank and start stop conditions. The nominal operating range is between 3.5V and 18V for this reason. Since in normal conditions, the battery voltage will not be as low, all electrical characteristics are defined from 6V onwards

3.3V is lower than the minimum recommended operating range and can result in UVLO turn off especially in the event of loading the rail. Therefore we recommend the use of our load switch devices for DC 3.3V rails.

The logic level compatibility means that you can control the device with 1.8V, 3.3V or 5V signals.

For more information on the various product families in our portfolio, please view the following: https://www.ti.com/lit/eb/slyy168/slyy168.pdf

Thanks,

Shreyas

+1 Sobin Sebastian 12 months ago in reply to Shreyas Dmello

Prodigy 90 points

Hi Shreyas,

Thanku for details, its clear now

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TPS1HC100-Q1: Switch for USB hub