ZP3 Board Tracking
Motivation behind this document is as we assemble boards we would like to keep track of their lifespan
First board to be powered up, marked on the label on the back with silver and black sharpie. Was check for shorts with DMM. 236k ohm VBATT input. 3V3 to GND 26.2k ohms. 5V to GND 1.1k ohms. Board kept reaching current limit at 1 A constantly as current limit. Initially powered on with 7 V then upped to 10 V then upped to 20 V for the following oscope captures. Board did not smoke at all, but the 5V and 3V3 power did not turn on. Oscilloscope captures of our input voltage after the power filter, 5V switch node and 5V output node are included below!
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So it seems the post power filter net has 1V ripple at roughly 200microseconds. The 5V SW node has 1V ripple at 8microseconds or 125kHz (as expected from the buck datasheet). 5V output is nearly zero. The power supply is also the culprit and was probed separately and has no noise within our scope range.
Buck Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max5033.pdf
I cannot find any issues in our application and suspect IC solder job. Ethan is inspecting. Reflowed the IC. Confirmed pinout is correct. No change in performance. Soldering photos were taken in discord and may be inserted below.
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The table below is for keeping track of the Status of the Zeropilot 3 primary boards being assembled
ZP3 Primary Num | Status |
---|---|
ZP3-1 |
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ZP3-2 |
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ZP3-3 |
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ZP3-4 |
|
ZP3-5 |
|
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The table below is for keeping track of the Status of the Zeropilot 3 interface boards being assembled
ZP3 Interface Num | Status |
---|---|
ZP3-1 |
|
ZP3-2 |
|
ZP3-3 |
|
ZP3-4 |
|
ZP3-5 |
|