The number indicates the model and version information of the power management chip. Each model of chip has different features and specifications, and the numbers can help people accurately identify and distinguish between different models of chips. In addition, the number can also represent the version information of the chip, so that people understand the updates and improvements of the chip. In electronic products, the power management chip plays an important role, it can monitor the battery level, control the charging and discharging process, so choosing the correct chip model and version is very important for product performance and stability.