Optimize Your Mobile Device’s Subcircuits for Battery Run Time
Technische Überblicke
Measure and analyze power consumption and control of subcircuits to gain greater insights for optimizing your mobile device’s battery run time.
Just as it is necessary to measure and analyze your mobile device’s overall power consumption for optimizing battery run time, you also need to measure and analyze your device’s subcircuits. Often, you will want to do this in conjunction with the overall power consumption to gain further insight on their relationship. Examples of measuring and analyzing a mobile device’s subcircuits include:
– Display illumination power in relation to the contrast and color controls
– Baseband microcontroller voltage and current in relation to its operating state and clock rate when voltage-frequency scaling is used
– RF power ampliier current and voltage in relation to RF transmit power, with additional consideration when dynamic voltage control is used
– Powering on individual subcircuits at the appropriate time for speciied operations
All the various subcircuits are most always powered by the power management unit (PMU). The PMU provides independent, regulated bias voltages to each of the subcircuits so they can be individually turned on or off, or their power can be adjusted as needed for power management purposes. Because of this arrangement, it is usually necessary to measure the respective voltage and current powering a subcircuit instead of directly powering it with an external DC source during test.