TPS25830A-Q1: Overcurrent on OUT action

Roy Chou1

Part Number: TPS25830A-Q1

Hi Team,

I see below Overcurrent on OUT action in datasheet. We use the external NFET to provide power path between Vbus and regulator out.

And my questions are showing as below.

1. What is the definition about minor overload conditions?

2. Will the fault assert when hard short event occur when we use the external NFET? We did the measurement and the result indicate that the fault pin will not have action. It's not make sense to us when hard short event occrred.

Regards,

Roy

over 2 years ago

0 Ansel Song over 2 years ago

TI__Expert 3890 points

Hi Roy,

We will reply next week.

Regards,

Ansel

0 Ansel Song over 2 years ago in reply to Ansel Song

TI__Expert 3890 points

Hi Roy,

1. There is no definition about minor overload conditions, just means 'few'.

2. Yes, there is no fault indication when using the external NFET under over-current condition.

Regards,

Ansel

0 Roy Chou1 over 2 years ago in reply to Ansel Song

TI__Genius 12595 points

Hi Ansel,

Thanks for comments.

I reviewed the datasheet and I would like double confirm if my understanding is correct or not. We use external NMOS structure.

1. If overload event occurred, the current will be limited. Could you let me know how could we know the event occurring?

2. If short circuit event occurred, the chip will go into hiccup mode like retry. Could you let me know how could we know the event occurring?

3. If we would like to test OVP feature in the factory, do you have any suggestion?

Regards,

Roy

0 Ansel Song over 2 years ago in reply to Roy Chou1

TI__Expert 3890 points

Hi Roy,

1. It can monitor LS_GD or VRimon/VILIMIT.

2. The same with 1st question. What is motivation to monitor this? Because 830A can handle itself.

3. I think it can monitor LS_GD, when OVP occurs, the LS_GD will turn to low.

Regards,

Ansel

Interface

Interface forum

TPS25830A-Q1: Overcurrent on OUT action