TPS610982: Input capacitor short failure

Hi Dino:

Firstly, please allow me check if the battery is still connected when Vin shorted?

Hi Minqiu, 

Thank you for your reply. 

Do you mean the IC won't damage if just short the VIN to ground although the battery is still connected? 

If the VIN(battery) is suddenly short to GND during operation, I am concerned about damage by reverse current. Let me know your opinion. 

Thank you. 

Hi Dino:

The High side FET will turn off once detect reverse current. And if the Vout drop a lot, the converter will disable, and all FET turn off. There is no route for reverse current. And the leakage current is small and won't damage the IC.

Hi Minqiu, 

Thank you for your help. 

To clarify,

"And if the Vout drop a lot, the converter will disable, and all FET turn off."

==> Vout drop??, do you mean Vin drop? due to short the VIN to ground. Is it right?

Thank you. 

Hi Dino:

If the Vin is short to ground, it can't supply the load anymore. So the Vout will drop, and cause the IC back to start. (Sorry, I shouldn't call it disable before)

Is there any power supply for Vout?

Hi Minqiu, 

There is no additional supply for Vout. There is only Vin(VBAT) connected battery. 

Thank you for your opinion. The customer wanted to know if Vin is short to GND could cause IC damage(leakage current).Your reply was very helpful.  I will reply to the customer as follows. 

"The IC won't damage if just short the VIN to ground. But I afraid the power supply will damaged. 

Thank you.