TPS2557 - the function of OUT-terminal

Dice-K

Other Parts Discussed in Thread: TPS2557

Hello,
I am using TPS2557.
I set Iosnom to 3.5A using Rilim=31.6kohm.
When the load current is 3.5A, OUT-terminal remains High though FAULT-terminal is Low.

Is this function correct?
Does this phenomenon occur between Iosmax and Iosmin?

When the load current is 3.55A, OUT-terminal changes to Low.

Regards,
Daisuke

over 10 years ago

0 Eric Wright over 10 years ago

TI__Mastermind 42795 points

The recommended range for Rilim is 20kohm to 187kohm.

For Ios=3.5A, Rilim should be 31.6kohm.

0 Dice-K over 10 years ago in reply to Eric Wright

Mastermind 6330 points

Hello Eric,
I'm sorry. I made an error in writing.
I am using a 31.6kohm.

Could you please give me an answer again?

Best regards,
Daisuke

0 Eric Wright over 10 years ago in reply to Dice-K

TI__Mastermind 42795 points

Please review the "OVERVIEW" and "OVERCURRENT CONDITIONS" text in the datasheet (page 9) and if you have further questions regarding that text, please post them.

0 Dice-K over 10 years ago in reply to Eric Wright

Mastermind 6330 points

Hello Eric,
I think as follows by the behavior of the EVM.
There is a small error between the current that changes FAULT-terminal to Low and the current that changes OUT-terminal to Low.
Is this correct?

Best regards,
Daisuke

0 Dice-K over 10 years ago in reply to Dice-K

Mastermind 6330 points

Hello Eric,
I attach the behavior of the EVM.
Is this behavior correct?
My question is FAULT-terminal changes to Low before entering Constant Current mode (Condition1).

Best regards,
Daisuke

TPS2557_FAULT_FLAG.pdf

Power management

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TPS2557 - the function of OUT-terminal