L9962

概要

The L9962 is part of a complete battery pack monitoring, balancing, and protection system for Li-Ion and Li-Polymer cells in 4-10 series configurations. The L9962 uses a high precision ADC to provide cell voltage, stack voltage and temperature conversion via external NTC. Voltage monitoring functions are cyclically performed with a programmable loop time. Stack current is also monitored via a high-accuracy CSA, continuously running and also performing Coulomb counting. Cell balancing is available and can be simultaneously activated on all cells. IC configuration and information exchange for SOC/SOH estimation are performed via an I2C peripheral. The IC also integrates a dual pre-driver programmable in both HS/LS configurations for driving pack relays. The L9962 also implements battery pack fuse protection to prevent fire and explosion hazards. A 3.3 V regulator with a high current capability is available for supplying the pack controller and other external circuitry in both standby and normal operation modes. The IC protects the battery pack against over-/undervoltage conditions and monitors for over-/undertemperature. It also features protection against overcurrent (both directions) and short-circuit in discharge events. Safety-relevant configurations can be stored in the internal NVM to avoid re-programming the device at each wake-up.