STMicroelectronics’ L9963F automotive battery-management IC (BMIC) includes all of the features needed to manage lithium battery packs in hybrid-electric (HE) and full-electric (FE) vehicles, as well as industrial energy storage systems and 48/96-V applications. The BMIC also brings under-the-skin improvements to the industry-proven L9963E as a fully compatible replacement that requires no hardware or software changes for existing users of the L9963 series. Coulomb counting inside the L9963F supports pack overcurrent detection in both ignition on and off states. It integrates circuitry to generate stable internal references and ensure measurement precision, including a voltage regulator and bootstrap. This high synchronization accuracy extends across multiple stacked ICs, leveraging the 2.66-Mb/s isolated serial communication interface to ensure maximum 4-µs latency between the first and 31st device in the chain.