BQ2063DBQG4

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Power Management Integrated Circuit (PMIC) is a single integrated circuit capable of managing the power of an electronic device. Battery Management is one of the categories of PMIC and its purpose is to monitor and control the power supplied to a battery or set of batteries. BQ2063DBG4 is an example of Battery Management chip designed for charging and monitoring Li-Ion/polymer batteries. This paper will focus on the application field and working principle of BQ2063DBG4.

This Battery Management chip is designed for use in portable electronics, including smartphones and digital cameras. It supports up to 4-cell Li-Ion/Polymer batteries with or without PCB current-sense resistor. BQ2063DBG4 provides protection against overcharger, overtemperature, and over-discharge conditions. Also, it is available in a UQFN packaging and has an onboard 32-bit microcontroller that allows setting of various charge parameters with minimal external components.

BQ2063DBG4 contains an internal voltage regulation circuit and an advanced battery charger. The voltage regulation circuit provides constant regulation voltage to the battery, while the battery charger regulates the amount of current from the power source going into the battery. This helps in extending the lifespan of the battery, avoiding overcharging. BQ2063DBG4 communicates alarms and errors through an I2C and SMBus serial interface.

The BQ2063DBG4 employs a hysteretic charging topology, which is based on constant maximum and minimum current limits. During the charge cycle, the maximum current limit is monitored to detect the end of the charge. When the maximum current is detected, the charge cycle is stopped temporarily and the minimum current is monitored, until the battery is deemed discharged. When the minimum current level is reached, the charger resumes the cycle, ensuring the accurate charge and avoiding overcharging of the battery.

Another key feature of BQ2063DBG4 is the introduction of charge profiling. This allows the user to configure the charger for a variety of charging scenarios, such as fast charging and trickle charging. The profiles can also be configured for temperature and voltage-based charging, optimizing battery performance at different levels of discharge, temperatures, and voltages.

BQ2063DBG4 also has a low power shutdown/standby mode, which helps in conserving energy, especially when the device is in standby. It also has a power-on reset timer, which is used to automatically turn off the device after charging, preventing overcharging and extending the battery life. Furthermore, the chip has an accurate current sense amplifier, which provides precise readings of the current supplied to the battery.

In summary, BQ2063DBG4 is a highly integrated Battery Management chip designed for Li-Ion/Polymer batteries. Its features include over-voltage, over-temperature, and over-discharge protection, voltage regulation, adjustable charge profiles, and current sense for precise readings. This chip is suitable for use in smartphones, digital cameras, and other portable electronic devices.

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