MagicWolfiThe board survived 4.95 A through the 0.05 Ohm shunt and test jig 0.5 Ohm resistor for > 1 minute. The shunt did not get too hot. My index finger temperature probe stayed rare.
The 5 W power resistor on the test jig got too warm to touch, so some forced air cooling will be required for longer tests. Or a bigger resistor to handle the 12.5 W.
Todo: Getting a log of the measured data from the INA209 and more testing to follow.
| Load | Measurement with 0.05 Ohm Shunt | Multimeter Verification Fluke 179 | Accuracy |
|---|---|---|---|
| 0.5 Ohm | 4983.4 mA | 5.0 A | 99.7% |
| 193.2 mA | 0.194 A | 99.6% | |
| 5.271 A | 5.29 A | 99.6% | |
| 2 Ohm | 220.6 mA | 222.1 mA | 99.3% |
| 400.9 mA | 399.4 mA | 99.6% | |
| 110 Ohm | 52.4 mA | 50.0 mA | 95.4% |
| 25.6 mA | 25.0 mA | 97.7% | |
| 9.8 mA | 10.01 mA | 97.9% | |
| 4.2 mA | 5.01 mA | 83.0% |
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