BQ29401PWR

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PMIC - Battery Management

The BQ29401PWR is an application-specific integrated circuit (ASIC) from Texas Instruments, designed to provide powerful battery management functionalities in a single, small package. It is part of the company\'s Battery Management Series, based on their TPS61800 architecture, which offers a comprehensive solution for engineers looking for an easy, reliable, and compact power supply. As a battery management IC, the BQ29401PWR offers integrated features that can help designers extend battery life, reduce board size, and ensure proper protection of the battery module from overcharge, overdischarge, and short circuit.

The BQ29401PWR is capable of providing precise voltage regulation with a wide variety of controller configurations. Its two linear regulators, two buck converters, and two integrated voltage references provide a wide range of output voltage. The two buck converters offer either 6.5V regulated or 6.5V adjustable output, while the two linear regulators provide 3.3V and 5V adjustable outputs. Moreover, it also provides external current limit settings, ensuring safe operation even with higher current loadings. Additionally, its charge control loop features a programmable current limit, input current monitor, and an internal programmable temperature monitor, as well as system temperature sensing capabilities.

On top of providing voltage regulation and current limit settings, the BQ29401PWR also provides state-of-charge (SoC) monitoring and cell balancing. Its two integrated analog-to-digital converters (ADCs) support up to 3-cell monitoring and up to 7 current limit settings. Furthermore, it has a leakage current sense amplifier to help protect the cells from excess discharging current. The cell balancing feature allows the device to actively monitor voltage drops across cells and symmetrically balance cell voltages, ensuring that the battery pack remains healthy.

The BQ29401PWR also has a wide range of safety features to ensure reliable operation. Its embedded protections include overvoltage, undervoltage, overcurrent, and short-circuit protection. Additionally, it has an integrated thermal shutdown mechanism to prevent thermal runaway and thermal runaway protection to protect cells from overcharging. Finally, its optional input reverse current protection helps protect the system from reverse current flows.

All of these features combine to make the BQ29401PWR a powerful and comprehensive battery management solution. To enhance its flexibility and scalability, the device is available in a number of package versions, allowing designers to scale their system based on their individual needs. Its wide range of monitoring and protection features make it an ideal solution for designers in a variety of applications, including wireless power, automotive, and industrial systems.

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