Semiconductor device, battery pack, and mobile terminal including voltage measurement, current measurement, and control

A battery pack comprising:

• the semiconductor device;
• and
• the battery,
• the semiconductor device comprising:
• a voltage measurement unit that measures an output voltage of a battery and a voltage on a power supply path between the battery and an internal circuit supplied with electric power from the battery;
• a current measurement unit that measures a discharge current of the battery;
• and
• a processor, executing program instructions stored in a non-transitory computer readable medium, that calculates a theoretical value of the output voltage in a normal measurement mode assuming that the discharge current measured in a large current measurement mode is a maximum available current of the battery in the large current measurement mode, and calculates an amount of maximum available power of the battery in the large current measurement mode based on the calculated theoretical value of the output voltage and the voltage on the power supply path measured in the large current measurement mode,
• wherein the theoretical value of the output voltage is calculated according to an internal resistance of the battery, and a resistance on a side including the voltage measurement unit, current measurement unit, and the processor.

A mobile terminal comprising:

• a battery pack including a semiconductor device and a battery;
• and
• the internal circuit driven by electric power supplied from the battery,
• the semiconductor device comprising:
• a voltage measurement unit that measures an output voltage of the battery and a voltage on a power supply path between the battery and an internal circuit supplied with electric power from the battery;
• a current measurement unit that measures a discharge current of the battery;
• and
• a processor, executing program instructions stored in a non-transitory computer readable medium, that calculates a theoretical value of the output voltage in a normal measurement mode assuming that the discharge current measured in a large current measurement mode is a maximum available current of the battery in the large current measurement mode, and calculates an amount of maximum available power of the battery in the large current measurement mode based on the calculated theoretical value of the output voltage and the voltage on the power supply path measured in the large current measurement mode,
• wherein the theoretical value of the output voltage is calculated according to an internal resistance of the battery, and a resistance on a side including the voltage measurement unit, current measurement unit, and the processor.