Difference between revisions of "Novena power characterization"
(Created page with "A power draw of 110 mA @ 12V was observed on multiple boards during suspend. Other i.MX6 boards report much lower current consumption, for example 40 mA @ 5V. In order to deter...") |
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| − | A power draw of | + | A power draw of 106 mA @ 12V was observed on multiple boards during suspend. Other i.MX6 boards report much lower current consumption, for example 40 mA @ 5V. In order to determine the sources of current drain, components are selectively depopulated and current draw is measured. |
| + | |||
| + | For this test, components are removed and then the board is booted. The board is running linux-3.16-rc4. The serial port is set as a wakeup source, although the difference in current draw is negligible when the serial port is not set as a wakeup source, or when the serial cable is detached. | ||
| + | |||
| + | {| class="wikitable sortable" | ||
| + | |+ Current draw | ||
| + | |- | ||
| + | ! scope="col" | Current (mA @ 12V) | ||
| + | ! scope="col" | Component removed | ||
| + | ! scope="col" | Notes | ||
| + | |- | ||
| + | | 106 || None || Board fails the factory test -- USB Loopback Test failed | ||
| + | |- | ||
| + | | 106 || None || Board fails the factory test -- USB Loopback Test failed | ||
| + | |} | ||
Revision as of 09:59, 29 July 2014
A power draw of 106 mA @ 12V was observed on multiple boards during suspend. Other i.MX6 boards report much lower current consumption, for example 40 mA @ 5V. In order to determine the sources of current drain, components are selectively depopulated and current draw is measured.
For this test, components are removed and then the board is booted. The board is running linux-3.16-rc4. The serial port is set as a wakeup source, although the difference in current draw is negligible when the serial port is not set as a wakeup source, or when the serial cable is detached.
| Current (mA @ 12V) | Component removed | Notes |
|---|---|---|
| 106 | None | Board fails the factory test -- USB Loopback Test failed |
| 106 | None | Board fails the factory test -- USB Loopback Test failed |
