TAS5414B-Q1: Synchronized Operation with External Clock

Sadanori Kato

Part Number: TAS5414B-Q1

Hi,

Is the master clock from 357kHz to 500kHz able to be applied to OSC_SYNC pin to synchronize 2 parts if I2C_ADDR pin is set to OSC SLAVE1/2/3 ?

Best regards,
Kato

over 7 years ago

0 Jeff Kohnle over 7 years ago

TI__Expert 6985 points

Hello Kato-san! Tuan can look into this question for you. Thanks, Jeff

0 Sadanori Kato over 7 years ago in reply to Jeff Kohnle

Guru 36500 points

Hi Jeff-san,

Thank you for your quick response.
I am looking forward to getting the information from Tuan-san.

Best regards,
Kato

0 Tuan over 7 years ago

TI__Mastermind 33420 points

Hi Kato-san,

The OSC_SYNC pin in master device is capable of drive two slave devices as long as they are on the same board and in proximity of the master device.

Regards,

Tuan

0 Sadanori Kato over 7 years ago in reply to Tuan

Guru 36500 points

Hi Tuan-san,

Thank you for your reply.

According to the data sheet, there is mentioned on page 18 of the data sheet that "An external oscillator can also be applied to this pin for external control of the switching frequency".
Therefore, is my understanding correct that an external clock from 2.68MHz to 4.24MHz is able to be applied to OSC_SYNC pin in the slave mode ?

Best regards,
Kato

0 Tuan over 7 years ago in reply to Sadanori Kato

TI__Mastermind 33420 points

That is correct BUT all three devices have to be in slave mode AND oscillator frequency should not be in the same PWM frequency to avoid beat frequency.

BR,

Tuan

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TAS5414B-Q1: Synchronized Operation with External Clock