TPA3123D2: Unused Pin Connection

hideyuki sakai

Mastermind 6250 points

Part Number: TPA3123D2

Dear, Sir.

My customer will use only Left channel (use only LIN).

The right channel will not use.

How is the better pin connection for

- RIN?

- ROUT?

- BSR?

All open is ok?

Please give your advice.

Best Regards,

H. Sakai

over 4 years ago

0 Yanming Gong over 4 years ago

TI__Mastermind 19030 points

Hi Sakai,

Unused input pins should be connected to ground through 1uF capacitors.

Since PWM still switching, unused out pins, BST pins connect to out pins through 0.22uF capacitors.

Regards,

Derek

0 hideyuki sakai over 4 years ago in reply to Yanming Gong

Mastermind 6250 points

Dear, Derek-san.

Thank you so much for your valuable advice.

Sorry again, I would like to double-confirm.

Unused ROUT & BSR pins should connect to LOUT pin through 0.22uF capacitors. Correct?

Best Regards,

H. Sakai

0 Yanming Gong over 4 years ago in reply to hideyuki sakai

TI__Mastermind 19030 points

Hi Sakai,

Unused BSR is connected to ROUT through 0.22uF capacitor.

Unused BSL is connected to LOUT through 0.22uF capacitor.

Regards,

Derek

0 hideyuki sakai over 4 years ago in reply to Yanming Gong

Mastermind 6250 points

Dear, Derek-san.

Sorry again.

The Left channel is used. The Right channel is unused.

How about the connection for ROUT? Open is ok?

Best Regards,

H. Sakai

0 Yanming Gong over 4 years ago in reply to hideyuki sakai

TI__Mastermind 19030 points

Hi Sakai,

If right channel is unused, Unused BSR is connected to ROUT through 0.22uF capacitor.

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TPA3123D2: Unused Pin Connection