Power Profile Design Tip

When optimizing a power profile, one should always consider the temperature profile of their battery. In some circumstances a power profile is optimized to have one short large pulse of power consumption, this is a common low power software technique that allows for maximum sleep time of the cpu. While this might reduce overall power consumption, this strategy might deplete the battery more so than a power profile which consumes more power however requires lower peak current at a longer duration. This is because some battery chemistries have optimal performance at different temperatures. For example, one could draw 100 mA for 1s and end up depleting more energy than if one draws 10mA for 10s, this occurs most commonly at low temperatures. The point to take away is that designers should always consider the target operating temperature in their designs optimization.

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