• Author Author: Jan Cumps
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TI SWIFT™︎ Power Module EVM RoadTest: Noise Measurements

Jan Cumps

I'm reviewing a single component DC converter for the TI SWIFTTm Power Module EVM RoadTest.

This blog is a request by to characterise the noise at output.

 

Feel free to comment with the tests you'd like to see done with the module.

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  wrote:

 

...  Have you characterized the noise levels on the output?  It would be interesting to see what the output looks like.  ...

Gene

 

Test Conditions

 

I've chosen the highest input voltage aloud and the lower end of the output voltage.

The current is the maximum I can draw from the device with the tools I have.

  • VIN: 14 V
  • VOUT: 0.6 V
  • IOUT: 7.75 A

 

I've put an oscilloscope probe on the output, in x10 mode.

Measurements

 

DC 200 mV /DIV

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AC 10 mV/ DIV, 50 ns /DIV

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Cursors to show the switching frequency component of 4 MHz.

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With 20 MHz bandwidth filter enabled - same as in the datasheet specifications.

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I measure 12 mV without external caps, 14 V in and 0.6 V out, 7.75 A

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Same settings as in the datasheet, except the capacitors - 14 V in, 1V out, 1 A:

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Related blog
TI SWIFTTm Power Module EVM RoadTest: Module Review and Test Setup
TI SWIFTTm Power Module EVM RoadTest: Noise Measurements
TI SWIFTTm Power Module EVM RoadTest: Efficiency