TPS56121: Current rating

Danilo A.

Part Number: TPS56121
Other Parts Discussed in Thread: TPS56221

Hi Team,

The TPS56121 is rated up to 15A as stated at page 1 of the datasheet. However, it states in section 8.2.2.12 it can handle 20A. Our customer would like to know how does this affect the reliability of the device and which one is correct?

Regards,

Danilo

over 2 years ago

0 David_Daniels over 2 years ago

TI__Mastermind 19080 points

The power stage for the TPS56121 is using same power stage at the TPS56221 device which is sized for 25A.

0 Danilo A. over 2 years ago in reply to David_Daniels

TI__Mastermind 25765 points

Hi David,

Thank you for your response. Does it mean that the 15A and 20A stated at page 1 and section 8.2.2.12 respectively are incorrect?

Regards,

Danilo

0 David_Daniels over 2 years ago in reply to Danilo A.

TI__Mastermind 19080 points

Not a mistake, the TPS56121 is a 15A spin from the 25A TPS56221. Section 8.2.2.12 is a design method and states the current limit can be set to a minimum 20A to assure developers that 15A output current can be achieved.

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TPS56121: Current rating