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Hi team,
We put a 12ohm resistor with a current meter in series to the Vout0 of the eval board. When we used the GUI (LP8758-xxEVM GUI — SNVC189.ZIP (6093KB)) to program the output voltage, the GUI read back much lower current. We got the same results after changing to different Vouts and even the 2nd eval board. We understand LP8758 has the resolution of current measurement as 20mA. Is this expected at low current scenario?
| Programmed output voltage | Ideal current draw | Current reading from the current meter | Current reading from TI GUI |
| 1V | 83mA | 80mA | 0mA |
| 2V | 166mA | 160mA | 60mA |
Thank you,
Tony
Hi Tony,
The device’s load current measurement is good for Iout ≥ 2 A within 10% accuracy; for small load current, its accuracy may be very low.
Thanks!
Phil
