TPS562201: SNUBER circuit suppresses NOISE intensity

Kevin Huang8

Genius 4791 points

Part Number: TPS562201

Hi Team,

Please comfirm TPS562201 snuber circuit(R92;C82;R94;C100),

Cause when programming the code in mcu,

TPS562201 have EMC issue to influences system stable.

can_bus干擾分析.pdf

over 4 years ago

0 Kevin Huang8 over 4 years ago

Genius 4791 points

R92: 10R

C82 : 2200pF

R94 : 4.7R

C100: 10pF

0 Jiandong Liu over 4 years ago in reply to Kevin Huang8

TI__Intellectual 1801 points

Hi Kevin,

R92,C82,R94 value is reasonable, C100 is feedforward capacitor which is used to improve loop stability, have no effect on EMI issues.

Could you capture SW pin waveforms to see the amplitude of ring?

Regards,

Jiandong

0 Kevin Huang8 over 4 years ago in reply to Jiandong Liu

Genius 4791 points

Hi Team,

CH3 is SW pin wavephone, is have spike influences CAN bus data.

0 Jiandong Liu over 4 years ago in reply to Kevin Huang8

TI__Intellectual 1801 points

Hi Kevin,

Sorry for missed your attached analysis report. From report, customer has solved this issue by adding snubber circuit. Snubber circuit values seems reasonable from my side. Are there any other concerns from customer?

Regards,

Jiandong

0 Jiandong Liu over 4 years ago in reply to Kevin Huang8

TI__Intellectual 1801 points

Hi Kevin,

As there are no reply from you for days, I'll close this thread.

Regards,

Jiandong

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TPS562201: SNUBER circuit suppresses NOISE intensity