TPS548A28: SW level

Jeff YANG

Genius 5425 points

Part Number: TPS548A28

Tool/software:

I have a question to ask. The attachment is the signal measurement of the TPS548A28 Switch node.

The level difference between the two signals is close to 1V. Is this normal? Please help confirm, thank you!

CH1 TPS548A28 SW pin

CH2 TPS548A28 VIN pin

Thanks!

Jeff

2 months ago

0 Ryan Chen 2 months ago

TI__Expert 7676 points

Hi Jeff,

What does your schematic look like? Is this measured on our EVM or customer board?

Do you have a boot resistor or snubber?

What are your design conditions? (Vin, Vout, Iout, FSW, etc)

Best,

Ryan

0 Jeff YANG 2 months ago in reply to Ryan Chen

Genius 5425 points

Hi Ryan,

Sorry that I don't mention the details.

It is measure by TPS548A28 EVM board. thanks!

Jeff

0 Ryan Chen 2 months ago in reply to Jeff YANG

TI__Expert 7676 points

Hi Jeff,

Did you make any modifications? I am using a default TPS548A28EVM with 12 Vin and this is the VIN and SW node. I am seeing that they have the same level.

Best,

Ryan

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TPS548A28: SW level