TPA3112D1-Q1: Schematic review

Ivy Jin

Expert 5955 points

Part Number: TPA3112D1-Q1

Tool/software:

Hi team,

Could you please help review the schematic and give some comments? Thanks in advance!

Regards,

Ivy

over 1 year ago

+1 Dylan Yao over 1 year ago

TI__Genius 11440 points

Ivy,

Here is the feedback.

1. the C35 GND connection position should be nearby DAC, and the trace should be matched with INP trace.

2. take care of L1 and L2 inductor's saturation current. it should be larger than 2A

3. C29 and C34 should be larger, typically 1uF or 2.2uF should be used. see datasheet section '8.2.2.5 When to Use an Output Filter for EMI Suppression'

Dylan

0 Ivy Jin over 1 year ago in reply to Dylan Yao

TI__Expert 5955 points

Hi Dylan,

May I ask if the SD and fault can be pulled up to external 5V? or they must need to be pulled up by PVDD or ACDD.

Regards,

Ivy

+1 Shadow He over 1 year ago in reply to Ivy Jin

TI__Guru 56230 points

Hi Ivy

SD pin internally is TTL structure powered by AVCC. If externally give a different power, will keep having leakage current, not recommend to do that.

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TPA3112D1-Q1: Schematic review