TPS56C215: TPS56C215 Design Review

user5270072

Intellectual 275 points

Part Number: TPS56C215

Hi There,

Can you Check my circuit about TPS56C215, thanks!

over 3 years ago

0 Gerold Dhanabalan - Online Design Tools over 3 years ago

TI__Genius 14455 points

Did you try creating a design using WEBENCH? The tool gives me a 1.2uH inductor. Any specific reason for choosing a 2.2uH inductor?

Below is the WEBENCH design. You will need to optimize based on your load transient requirement.

https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=5BEE1F53443BB936

Regards,

Gerold

0 Lishuang Zhao over 3 years ago in reply to Gerold Dhanabalan - Online Design Tools

TI__Expert 7500 points

Hi,

12Vin-5Vout-800KHz, using 2.2uH inductor is okay.

1. Recommend to change the PG pull up resistor from 1K to 10K.

2. For FB resistors, to improve efficiency at very light load consider using large value resistor, too high resistance will be more susceptible to noise. So recommend the R1+R2 value setting to 10K, PR72 setting to 73.4K.

3. Recommend PC100 welding.

Thanks,

Lishuang

0 user5270072 over 3 years ago in reply to Gerold Dhanabalan - Online Design Tools

Intellectual 275 points

Hi Gerold,

There is some difference between your simulation parameter and my design:

1. The Mode pin resistors setting value.

2. The FB pin resistors setting value.

3. The PC 100 value.

4. The SS pin serial cap value.

0 Lishuang Zhao over 3 years ago in reply to user5270072

TI__Expert 7500 points

Hi,

Please check updates from my last post.

Thanks,

Lishuang

0 user5270072 over 3 years ago in reply to Lishuang Zhao

Intellectual 275 points

Hi Lishuang,

1. There is a pull up 10k at the other side.

2. I'll modify the resistors value from your recommand.

3. Stuff PC100 now!

Thanks

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TPS56C215: TPS56C215 Design Review