BQ771807DPJT

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Power Management Integrated Circuit(PMIC) is an important element in the modern consumer electronics. PMIC can provide a variety of power regulation to the system, so that the system can run smoothly and efficiently. For the consumer electronics which equipped with a battery, battery management must be taken into account. The BQ771807DPJT is a battery management integrated circuit developed for consumer electronics. This article will analyze the application fields and working principle of BQ771807DPJT.

Application Field

The BQ771807DPJT was primarily designed for consumer electronics powered by a single lithium-ion battery. It provides a complete set of protection functions to protect the battery from over-voltage, over-current and short-circuit, making sure that charge and discharge of battery is within safe operation range. It also implements an integrated system-level sequence so that correct charging and discharging procedure can be followed. The BQ771807DPJT is a small and low-power device, supports I2C and SMBus communication protocol, making it suitable for use in portable computers and mobile phones.

Working Principle

The core function of BQ771807DPJT is its ability to detect battery health and temperature, and then regulate the charging or discharging process according to battery\'s state. The device interface external charge IC and battery voltage sense resistor, by measuring voltage across the resistor and monitor system current through the placed current sense resistor. Under certain specifications, the device decides the battery\'s current is pluged in or ready to use. During charger connection and battery connection, the device can detect the voltage of battery and measure the charge current of system. A voltage regulator will determine the charging voltage which is based on battery temperature, used power source and battery capacity.

BQ771807DPJT is equipped with protection mode which can protect battery from over-voltage, over-current, under-voltage and over-temperature. In addition, the BQ771807DPJT supports open wire detection, it can monitor the charging cable connection, determining whether the connection and polarity is correct. The BQ771807DPJT can generate hardware interrupt and signaling to host processor when an abnormal situation is detected.

The BQ771807DPJT has the ability to store calibration and state data in on-chip non-volatile storage. This data can be read by the host processor, so that system can continuously monitor the battery\'s health and temperature. The device also supports various system management protocols, such as PMBus, allowing the host processor to remotely monitor and control the BQ771807DPJT.

Conclusion

The BQ771807DPJT is a battery management integrated circuit designed for consumer electronics powered by a single lithium-ion battery. It provides a complete set of protection functions to protect the battery from over-voltage, over-current and short-circuit, making sure that charge and discharge of battery is within safe operation range. The BQ771807DPJT is small and low-power device and supports I2C and SMBus communication protocol, making it suitable for use in portable computers and mobile phones. The device can store calibration data and state data in on-chip non-volatile storage, so that system can continuously monitor the battery\'s health and temperature.

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