TPS1HB50-Q1: Datasheet clarifications: RILIM pull-up, resistance value, and FAULT pin

Ashiful Khurashi

Part Number: TPS1HB50-Q1
Other Parts Discussed in Thread: TPS1HC100-Q1

Hello,

I am planning to use the TI TPS1HB50-Q1 Smart High Side Switch for a project I am working on and I have some questions about it.

Should the ILIM pin should be pulled up to VBB? Just want to verify this. Typically I have seen this pulled to GND for other smart switches.
In the datasheet, it mentions the “FAULT” pin quite a lot but I don’t see this pin as being part of this IC. Is this a typo? It looks like this is a typo and is meant for another part.
We are planning to drive only about 50mA (maybe max 100mA) through this IC. If I’m reading the datasheet correctly, it looks like it’s recommended to use a max resistor value of 25kOhm for the RILIM resistor, this would be nominally about a max current limit of 3.4A. This is correct? I was going to use a 100kOhm resistor but this would go against the recommended values.

Thank You,

Ashiful

over 4 years ago

+1 Yichi Zhang. over 4 years ago

TI__Genius 16390 points

Hi Ashiful,

Let me try to answer the questions.

1. Yes, this one is connected to VBB to set the limit.

2. Nice catch. Let me talk to the team for the fix.

3. Version A has current limit range from 2-10A while version B has 3.6-18A. These are the limits for these parts, and out of range resistor value might not work properly.

Hope this answer your questions.

Regards,

Yichi

0 Ashiful Khurashi over 4 years ago in reply to Yichi Zhang.

Prodigy 40 points

Thanks. On page 4 (Section 6.1) it mentions the TPS1HC100-Q1 part and I think the table is from that datasheet, which has the fault pin. Would be good to get an updated datasheet.

0 Yichi Zhang. over 4 years ago in reply to Ashiful Khurashi

TI__Genius 16390 points

Sounds good. Thank you Ashiful for pointing it out!

Regards,

Yichi

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TPS1HB50-Q1: Datasheet clarifications: RILIM pull-up, resistance value, and FAULT pin