The main factors affecting the power consumption of Bluetooth chips

The main factors affecting the power consumption of Bluetooth chips include broadcast interval, connection interval, transmission power, main frequency, sleep and wake-up time, and power supply mode. The following is a specific analysis:

Broadcast interval and connection interval

The larger the broadcast interval (such as increasing from 20ms to 10240ms), the lower the power consumption; The longer the connection interval (such as increasing from 7.5ms to 4000ms), the lower the power consumption. But it is necessary to balance connection stability and power consumption requirements
transmit power

The transmission power directly affects the power consumption. The transmission power range of Bluetooth low-power versions (such as 5.1/5.2) is -20dBm to 20dBm, while traditional Bluetooth versions can reach 10dBm. Under the same conditions, the smaller the transmission power, the lower the power consumption

Main frequency and clock source

The higher the main frequency (such as 48MHz compared to 6MHz), the higher the power consumption; A 32K clock source is more energy-efficient than an external crystal oscillator. Suggest choosing a low frequency and precise clock source to reduce power consumption

Sleep wake-up mechanism

The shorter the sleep wake-up time, the lower the power consumption; Deep sleep mode (such as Power off mode) only supports GPIO wake-up, and the system needs to be restarted after wake-up, which is suitable for scenarios with low real-time requirements

Power supply mode and voltage

DCDC power supply mode is more energy-efficient than LDO power supply; The lower the voltage (such as 1.8V compared to 3.6V), the lower the power consumption. Suggest using a low dropout linear regulator (LDO) to reduce energy consumption
Broadcast data length and peripheral impact

The shorter the broadcast data length, the lower the power consumption; The higher the switching frequency of peripherals such as LED indicator lights and gyroscopes, the greater the power consumption. Suggest turning off unnecessary peripherals or reducing their operating frequency

The main factors affecting the power consumption of Bluetooth chips

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