STMicroelectronics L9961: Advanced Battery Management IC

Overview

The STMicroelectronics L9961 is a sophisticated integrated circuit designed for comprehensive battery pack management. It is engineered to monitor, balance, and protect Lithium-Ion and Lithium-Polymer battery cells, supporting configurations of 3, 4, or 5 series cells.

Key Features

• Low power consumption in SHIPMENT - DEEP SLEEP and Standby modes.
• Integrated 3.3 V VREG LDO for powering MCUs and LEDs.
• Precise cell voltage, stack voltage, and temperature measurements with over/under voltage and temperature detection.
• Accurate current measurement with Coulomb Counting and protection against over-current and short-circuits.
• I²C peripheral for device programming and data communication.
• Cell balancing capability for up to 70 mA per cell.
• Dual configurable HS/LS pre-drivers for pack relay management.
• Embedded NVM for storing configuration parameters.
• High hot plug robustness.

Applications

The L9961 is ideal for a range of applications, including:

• Cordless Power Tools
• Backup Energy Storage Systems and UPS
• Light Electric Vehicles (E-bikes, Scooters)
• Portable and Semi-portable Equipment
• Medical Equipment

Package Information

The L9961 is available in a VFQFPN package measuring 5x5x1.00 mm, designed to meet environmental requirements.