TPS61041-Q1: On the result of switching frequency

Koji Hayashi92

Mastermind 6970 points

Part Number: TPS61041-Q1

Hi All

My customers are concerned about noise due to switching frequency.

Is there a graph or calculation formula showing the relationship below?

1,Switching frequency vs output current.

2,Switching frequency vs ambient temperature.

Best Regards,
Koji Hayashi

over 6 years ago

0 Helen chen over 6 years ago

TI__Mastermind 40080 points

1,Switching frequency vs output current. Please check the below formula.

2,Switching frequency vs ambient temperature. We didn't have this data.But we found the fsw get very high at high temp. We're checking the root cause.

0 Koji Hayashi92 over 6 years ago in reply to Helen chen

Mastermind 6970 points

Hi Helen-san

Thnak you for quick response.

1. I understood. I will reply to customers.
2.When can I receive confirmation results?

Best Regards,
Koji Hayashi

0 Helen chen over 6 years ago in reply to Koji Hayashi92

TI__Mastermind 40080 points

We check on the bench found the frequency changes little at high temp. The mainly change is caused by the inductor. So you need to check the indunctance change curve wtth temp then add around +_5% IC tolerance , this will be enough .

0 Koji Hayashi92 over 6 years ago in reply to Helen chen

Mastermind 6970 points

Hi Helen-san

Thank you for response.

I understood.

Best Regards,
Koji Hayashi

Power management

Power management forum

TPS61041-Q1: On the result of switching frequency