TPS254900-Q1: resistor on IMON pin

Elec Cheng

Expert 7055 points

Part Number: TPS254900-Q1

Hi Expert,

Can I change the resistor value between IMON pin and GND? I see in datasheet that the res is all 2.55kΩ.

BR,

Elec Cheng

over 2 years ago

0 Kuno Wu over 2 years ago

TI__Mastermind 18556 points

Hi Elec,

Will reply to you soon.

Kuno.

0 Jianhua Liu over 2 years ago

TI__Intellectual 1000 points

Hi Elec,

We recommend to use the datasheet typic resistor 2.55kOhm. Since all data on the datasheet is based on R(IMON) = 2.55 kΩ.

If you have to change the R(IMON), it is also should be fine. About the resistor value and related voltage on IMON, please refer to below information:

Jianhua

0 Elec Cheng over 2 years ago in reply to Jianhua Liu

TI__Expert 7055 points

Hi Jiahua,

Thanks for reply! In above table, why is 2.5V special? According to the parameter, Vimon max is 337uA * 2.25K=0.86V. Does it mean that Vimon should be lower than 2.5V? Thanks!

BR,

Elec Cheng

0 Jianhua Liu over 2 years ago in reply to Elec Cheng

TI__Intellectual 1000 points

Hi Elec,

This is our test condition. and to ensure the precision, better to make sure the Vimon less than 2.5V.

Jianhua

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TPS254900-Q1: resistor on IMON pin