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SparkFun will be closed May 25, 2015 for Memorial Day. Orders placed after 2pm on Friday the 22nd will ship out on Tuesday. Thanks!

DayBlur

Member Since: November 22, 2006

Country: United States

  • I’m considering purchasing this, but from the schematic it looks like there is a pullup on PIO7 which would always force the module to start up at 9600 baud, regardless of the configured setting. There seem to be several forum posts supporting the existence of this error. Can someone on the SparkFun staff comment on the issue?

  • It’s more than just a buck converter, it has a down conversion mode which regulates properly when the input voltage is higher than the desired output, albeit at a reduced efficiency.
    From the datasheet:
    “If the input voltage reaches or exceeds the output voltage, the converter automatically changes to a Down Conversion mode. In this mode, the control circuit changes the behavior of the two rectifying switches. While continuing switching it sets the voltage drop across the rectifying switches as high as needed to regulate the output voltage”

No public wish lists :(