TPS82140: Output shorted to GND

Iain Davis1

Part Number: TPS82140
Other Parts Discussed in Thread: TPS62140

Hello,

The TPS82140 has an upper switch current limit of 4A (range 3-4A) - if the output is shorted to GND, would the module essentially hiccup to 4A at some frequency, with Thermal protection kicking in at some point thereafter?

Although there isn't inherit Short circuit protection (as far as I can tell), would the device at lease survive?

Thank you in advance,

Iain

over 4 years ago

0 Vincent Zhang(BSR) over 4 years ago

TI__Expert 4795 points

Hi Lain,

TPS82140 will survive at short circuit condition. I will check its behavior and feedback to you.

0 Jean Picard over 4 years ago

TI__Intellectual 1125 points

Iain Davis1

0 Jean Picard over 4 years ago

TI__Intellectual 1125 points

Iain Davis1 (6065815)

The TPS82140 uses the TPS62140 IC. During that condition, the switching goes while following the current limit.

Note that as explained in TPS62140 data sheet, it maintains the nominal current limit as long as the overload is not strong enough to bring Vout below 0.5 V.

If the overload forces Vout to go below 0.5V, the current limit is temporarily reduced, but still the switching goes on, unless thermal limit kicks in.

Regards

0 Jean Picard over 4 years ago in reply to Jean Picard

TI__Intellectual 1125 points

Iain Davis1

Hi Iain

The TPS82140 uses the TPS62140 IC. During that condition, the switching goes while following the current limit.

Note that as explained in TPS62140 data sheet, it maintains the nominal current limit as long as the overload is not strong enough to bring Vout below 0.5 V.

If the overload forces Vout to go below 0.5V, the current limit is temporarily reduced, but still the switching goes on, unless thermal limit kicks in.

Regards

0 Iain Davis1 over 4 years ago in reply to Vincent Zhang(BSR)

Prodigy 245 points

Thank you for confirming Vincent.

0 Iain Davis1 over 4 years ago in reply to Jean Picard

Prodigy 245 points

Thank you for confirming Jean (Truly appreciate the detailed explanation).

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TPS82140: Output shorted to GND