BQ27411DRZR-G1A Integrated Circuits (ICs)

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Power management integrated circuits (PMICs) are chip-level solutions designed to convert, monitor, and manage energy sources from the likes of batteries, suppliers, and alternative energy sources. A popular PMIC in the industry is the BQ27411DRZR-G1A. This PMIC, or integrated circuit, is designed for use in battery-powered applications. It is an easy-to-use, highly integrated, cost-effective and reliable solution for managing a battery pack.

The BQ27411DRZR-G1A belongs to the family of smart battery ICs (integrated circuit) from Texas Instruments. The device provides a highly integrated, cost-efficient and reliable solution for managing battery-powered applications. This IC integrates the functionality of a gas gauge, system power measurement, safety, and communication features, making it an excellent choice for system integrators

Application Field:

The BQ27411DRZR-G1A is a highly-integrated SMBus-compatible battery IC designed for use in battery-powered systems. With an integrated gas gauge and high-side current sensing capability, this IC is capable of accurately measuring and managing energy levels, power delivery, and charging for applications such as portable electronics, automotive, and medical devices. The device enhances system safety and reliability by providing data monitoring, diagnostics, and protection features that enable it to monitor and control a wide range of system conditions.

Additionally, the device supports data logging and reporting of all system events for battery maintenance and service. This helps reduce downtime and the need for user intervention. It is designed for use with Li-Ion, LiPoly, LiFePO4, and NiMH battery chemistries and is compatible with 1-cell and 2-cell configurations.

Working Principle:

The BQ27411DRZR-G1A is an integrated battery fuel gauge IC that measures the charge and discharge characteristics of a Li-ion or Li-polymer battery stack. The device\'s high-side current sensing capability allows it to continuously measure the charge and discharge currents in the battery and compute the amount of charge available in the battery. A SMBus-compatible interface provides the host with the ability to remotely monitor, configure, and control the device via I2C/SMBus, thus eliminating the need for manual setup and configuration.

The device utilizes a custom analog to digital converter (ADC) with dual-slope architecture. It senses the battery’s current, voltage, temperature, and charge/discharge state via an inductor, voltage divider, current shunt, and thermistors connected to the IC. All battery characteristics such as charge and discharge taper, peak current, and temperature ranges are stored in the device\'s on-chip flash. These parameters are used for battery balancing, charge control, and over-discharge protection. The device supports user-defined thresholds for certain battery parameters.

The device automatically recalculates the remaining capacity in the battery pack based on the sensed parameters. It also estimates the remaining battery runtime and available power, and can provide the host with the estimated remaining capacity and state of charge readings. This helps the host in determining when to perform a battery recharge or power down the system. The device can be configured to enter low-power mode when the system is idle or in an extended shutdown state.

Conclusion:

The BQ27411DRZR-G1A is an integrated battery fuel gauge IC that is designed for use in battery-powered applications. With its integrated features, cost-efficiency, and reliability, it offers system integrators a high-performance and easy-to-use solution for managing battery packs. As a subset of the PMIC family, the device provides a comprehensive set of features, such as gas gauging, system power measurement, safety and communication features, data logging, and reporting, making it an excellent choice for system integrators.

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