BQ771602DPJR

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PMIC (Power Management Integrated Circuits) is an important component of the electronics industry. Battery Management is one of the many application fields concerned with PMICs, and has applications in a wide range of industries. This article will discuss BQ771602DPJR as an example of a battery management PMIC and explain its working principle.

BQ771602DPJR is a monolithic integrated circuit (IC) which integrates a number of functions related to battery management. It is intended for use in tablets, mobile phones and other battery-operated portable devices in order to provide a safe and reliable battery management system. The chip is designed to reduce the possibility of overcharging and over-discharging of the battery, as well as providing various protections for the battery when necessary.

The main functions of the BQ771602DPJR include:

• Battery Management: This chip is designed to manage the charge and discharge of the battery, such as controlling the charging current, measuring the voltage, protecting the battery from overcharge, and shutdown of the device when necessary.
• System Monitoring: The chip is capable of accurately monitoring the system voltage, current and temperature as needed in a battery-operated device.
• Gas Gauging and Pack Balancing: The chip will monitor the state of battery health, as well as being able to calculate the remaining capacity and accurately calculate the amount of remaining power of a single battery cell or the whole battery pack.

The working principle of the BQ771602DPJR is based on two main features, namely the Analog Front-End (AFE) and the Battery Management System (BMS). The AFE is responsible for measuring battery voltage, temperature and current, conversion, and threshold detection. The BMS is then responsible for monitoring, alarming and safety control. The chip is also designed to be compatible with a broad range of battery packs, such as Li-ion, Li-Polymer, NiCd and NiMH.

The AFE is composed of two main components, namely an analog section and a digital section. The analog section consists of three Integrated Circuits (ICs); the voltage monitor, temperature monitor and charge current monitor. The voltage monitor is responsible for measuring the battery voltage and setting a threshold level. The temperature IC measures the temperature of the battery and can detect the onset of thermal runaway. The charge current IC then measures the current in and out of the battery, in order to accurately calculate the amount of charge left in the battery, as well as protect the battery from overcharge. All three ICs send the voltage, temperature and current readings to the digital section for further analysis.

The BMS is responsible for taking the measurements from the AFE and making decisions regarding the battery and system health. The BMS will then initiate safety control or alerts depending on the measurements. The chip is also designed to integrate with the system\'s power management system, allowing the device to be powered down if necessary in order to prevent damage to the battery such as overcharging. The chip can be further integrated with other monitoring devices, such as fuel gauges, in order to accurately measure the remaining battery capacity.

In conclusion, the BQ771602DPJR is an important PMIC chip used in battery management systems in a variety of industries. It is composed of two main elements, namely an analog front-end and a battery management system. The chip is also capable of integrating with other monitoring devices and systems to accurately measure the battery health and remaining capacity for a safe and reliable battery management system.

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