TPS65270: To estimate power dissipation

Hi Statham,

Thanks for reaching out! You can refer to Section 11.3 for details introduction about how to check power dissipation. Anything unclear, please kindly let us know!

BRs

Lucia

Hi Lucia:

Please let me know how to calculate PDIS of TPS65270?

4. PDIS is the sum of losses in all converters

Thanks.

Hi Statham,

PDIS is the sum of losses in all converter. You can refer to figure 19-22 about power loss under different Vin and VOUT/Load condition. You can also order an EVM to test the power loss. 

Thanks!

BRs

Lucia

Hi Lucia:

Thanks your feedback.

I have below questions.

1. Can you let me know the unit of Y axis?

2. if the output voltage of buck2 changes to 9V, how about the power loss will be?

3. what the color defined of these curves?

Looking forward your feedback.

Thanks a lot.

Hi Statham,

1. The unit of Y axis is Watt.

2. The figures shown in the datasheet is tested with 12Vin. If you want to check the power loss of 9Vin, it's recommended that you can check it with EVM board.

3. For these figures, from top to bottom represent 5 V, 3.3 V, 2.5 V, 1.8 V, 1.2 V.

Thanks! Kindly let us know any of your concern!

BRs

Lucia