Power optimization - enable the DC/DC regulator. #1755
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The DC/DC regulator reduce the power consumption of the MCU compared to the default LDO regulator. The DC/DC regulator needs additional HW that is mounted on the PineTime. This change reduces the power usage by 380µA during fast advertising, by 200µA during slow advertising and by 186µA when BLE is disabled.
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Apparently this is supported in Mynewt - but not in FreeRTOS I guess: # Enable DC/DC regulator
MCU_DCDC_ENABLED: 1
If DCDCEN has any effect, it means that something is still draining power: DCDCEN does not (significantly) reduce current consumption when the nrf52832 is fully asleep. (But I guess the other PRs should help with that). |
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commit d863d1c Author: Jean-François Milants <jf@codingfield.com> Date: Sun May 7 18:15:33 2023 +0200 Power optimization - enable the DC/DC regulator. The DC/DC regulator reduce the power consumption of the MCU compared to the default LDO regulator. The DC/DC regulator needs additional HW that is mounted on the PineTime. This change reduces the power usage by 380µA during fast advertising, by 200µA during slow advertising and by 186µA when BLE is disabled.
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According to my measurement, the watch uses ~240µA more during fast BLE advertising, and ~15µA during slow advertising. However, the measurements are the same when BLE is disabled, exactly as you said! |
mark9064
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May 27, 2023
commit d863d1c Author: Jean-François Milants <jf@codingfield.com> Date: Sun May 7 18:15:33 2023 +0200 Power optimization - enable the DC/DC regulator. The DC/DC regulator reduce the power consumption of the MCU compared to the default LDO regulator. The DC/DC regulator needs additional HW that is mounted on the PineTime. This change reduces the power usage by 380µA during fast advertising, by 200µA during slow advertising and by 186µA when BLE is disabled.
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The DC/DC regulator reduce the power consumption of the MCU compared to the default LDO regulator. The DC/DC regulator needs additional HW that is mounted on the PineTime.
This change reduces the power usage by 380µA during fast advertising, by 200µA during slow advertising and by 186µA when BLE is disabled.