I'm reviewing a single component DC converter for the TI SWIFT This blog is a request by genebren 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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genebren 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
AC 10 mV/ DIV, 50 ns /DIV
Cursors to show the switching frequency component of 4 MHz.
With 20 MHz bandwidth filter enabled - same as in the datasheet specifications.
I measure 12 mV without external caps, 14 V in and 0.6 V out, 7.75 A
Same settings as in the datasheet, except the capacitors - 14 V in, 1V out, 1 A:
| Related blog |
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TI SWIFT Power Module EVM RoadTest: Module Review and Test Setup |
| TI SWIFT Power Module EVM RoadTest: Noise Measurements |
| TI SWIFT Power Module EVM RoadTest: Efficiency |
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