The L9961 from STMicroelectronics is a Battery Management IC that has been designed for Li-ion and Li-Polymer cells in 3, 4, or 5 series configurations. It requires an input voltage of 4.3 - 25 V.  This BMIC includes a power supply, cell voltage sensing, and balancing, current sensing, an NTC analog front end, HS/LS pre-drivers, digital IOs, a charger connection, a safety bypass, fuse circuitry. It uses a high-precision ADC to provide cell voltage, stack voltage, and temperature conversion via an external NTC. This BMIC includes voltage monitoring functions for cyclic performance using a programmable loop time. It also consists of a high-accuracy current sense ADC (CSA) to monitor stack current and perform coulomb counting. This BMIC offers cell balancing and can be simultaneously activated to operate on all the cells. It uses an I²C peripheral interface to configure the IC configuration and exchange information for SOC and SOH estimation.

This AEC-Q100-qualified IC integrates a dual pre-driver programmable in both HS and LS configurations for driving pack relays. It has a 3.3 V regulator with a high current capability for supplying the pack controller and other external circuitry under stand-by and normal operation modes. This BMIC stores safety-relevant configurations in the internal NVM to avoid reprogramming every time the device is activated. It implements battery pack fuse protection to prevent fire and explosion hazards. This BMIC protects the battery pack against over- and under-voltage conditions and monitors over- and under-temperature conditions. It also offers protection against overcurrent (both directions) and short-circuits discharge events. This AEC-Q100 qualified BMIC is available in a surface mount package that measures 5 x 5 x 1 mm and is ideal for cordless power tools, backup energy storage systems, UPS, light electric vehicles (e-bikes, scooters), portable and semi-portable equipment, and medical equipment applications.