TAS5411-Q1: PWM frequency variation

Yasushi Fujiwara

Part Number: TAS5411-Q1

Hello Experts,

Customer wants to know output PWM frequency variation both of 400KHz setting and 500KHz setting. A below thread has answered that is around +/-5%. Is it at room temp, typical power supply voltage and is not included process variation, right?

https://e2e.ti.com/support/audio/f/6/t/599814?tisearch=e2e-sitesearch&keymatch=TAS5411-Q1%2520frequency

Best Regards,
Fujiwara

over 6 years ago

0 Gregg Scott over 6 years ago

TI__Mastermind 45085 points

Fujiwara-san,

The 5% tolerance in the other thread is valid. This does take into consideration the process variation. What is the concern?

0 Yasushi Fujiwara over 6 years ago in reply to Gregg Scott

TI__Genius 12725 points

Hi Gregg-san,

My customer is testing EMI by 400KHz PWM frequency setting but customer reported that 3rd harmonics of output PWM frequency was violated customer spec. Customer changes PWM frequency to 500KHz to see whether EMI test will pass or not. So customer wants to know the variation of PWM frequency.

Best Regards,
Fujiwara

0 Gregg Scott over 6 years ago in reply to Yasushi Fujiwara

TI__Mastermind 45085 points

Fujiwara-san,

5% tolerance is valid per my earlier post.

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TAS5411-Q1: PWM frequency variation