Battery Multi-Function Controller IC Lithium Ion/Polymer 32-VFQFPN (5x5) L9961 is part of a complete battery pack monitoring, balancing, and protecting system for Li-Ion and Li-Polymer cells in 3, 4 or 5 series configurations. The L9961 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 performing also 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 I2C peripheral. The IC also integrates a dual pre-driver programmable in both HS/LS configurations for driving pack relays. L9961 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 pack controller and other external circuitry in both standby and normal operation modes. The IC protects the battery pack against over/under voltage conditions and monitors for over/ under temperature. 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. Features • 2 μA shipment - DEEP SLEEP mode current and 5 μA standby consumption (with VREG LDO active) standby consumption (with VREG LDO active) • Integrated 3.3 V VREG LDO for supplying MCU and LEDs • Measures cell voltage (3 to 5 cells), with over/undervoltage detection and balance undervoltage protection • 12-bit voltage measurement with maximum error of ±15 mV in the [1.5 – 4.5] V range, for -40 °C < TJ < 105 °C • Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells • Measures pack temperature via NTC, with over/undertemperature detection • Ratiometric temperature measurement with ±0.8% max. gain error in the [0.2 – VREG] V range, for -40 °C < TJ < 105 °C • Measures battery current, with Coulomb counting, overcurrent (both directions) and short-circuit in discharge protection. • 16-bit signed current measurement with 0.1% full scale error at room temperature • I 2C peripheral for device programming and data transfers over I2C bus • Cell balancing supporting up to 70 mA per cell • Dual configurable HS/LS predriver for pack relay management • Pack fuse management • Embedded NVM for configuration parameters storage • High hotplug robustness Applications • Cordless power tools • Backup energy storage systems and UPS • Light electric vehicles (e-bikes, scooters, etc.) • Portable and semi-portable equipment • Medical equipment #L9961TR #BatteryManagement #BMS #LiIonBattery #LiPoBattery #STMicroelectronics #BatteryProtection #CellBalancing #CoulombCounting #PowerManagement #EmbeddedSystems #EnergyStorage #EBike #PowerTools #ElectronicsDesign

BQ7961x-Q1 family (BQ79612-Q1, BQ79614-Q1, BQ79616-Q1, BQ79616H-Q1) are automotive-grade, functional safety-compliant battery monitoring and balancing ICs from Texas Instruments for high-voltage Battery Management Systems (BMS). The devices support 12, 14, or 16 series-connected lithium-ion battery cells and provide high-accuracy voltage measurements, integrated cell balancing, hardware protection, temperature monitoring, and isolated daisy-chain communication. Designed for hybrid and electric vehicles (HEV/EV) and energy storage systems (ESS), the BQ7961x-Q1 family supports ISO 26262 functional safety up to ASIL D, integrated diagnostics, redundant voltage measurement paths, configurable digital filtering, and stackable architectures for large battery packs. The family offers precise battery state monitoring, enhanced safety, and scalable BMS implementation for automotive and industrial energy storage applications. Search Keywords: BQ79612-Q1, BQ79614-Q1, BQ79616-Q1, BQ79616H-Q1, BQ7961x-Q1, Texas Instruments BQ79616, Battery Monitor IC, Battery Management System IC, BMS Controller, Automotive BMS, EV Battery Monitor, Cell Balancing IC, High Voltage Battery Monitor, ISO26262 ASIL-D, Automotive Battery Protection, Lithium Battery Monitor, Energy Storage BMS, Stackable Battery Monitor, Battery Pack Monitoring, Cell Voltage Measurement IC, Electric Vehicle Battery Management Hashtags: #BQ79612Q1 #BQ79614Q1 #BQ79616Q1 #BQ79616HQ1 #BQ7961xQ1 #TexasInstruments #BatteryManagementSystem #BMS #CellBalancing #BatteryMonitor #ElectricVehicle #EVBattery #EnergyStorage #LithiumBattery #AutomotiveElectronics #ISO26262 #ASILD #PowerElectronics #EmbeddedSystems #HardwareDesign BQ79612-Q1

BQ29209DRBR – Integrated 2-cell Li-ion/Li-polymer battery protection and management IC. Provides overvoltage, undervoltage, and overcurrent protection for each cell while incorporating automatic cell balancing to maintain uniform charge levels. Designed for compact 2S battery pack applications, it ensures safe and reliable operation in portable electronics, battery-powered devices, and custom BMS circuits. Ideal for extending battery life, preventing overcharge or deep discharge, and supporting high-efficiency energy management. #2SLiIonBMS #BatteryProtectionIC #CellBalancing #OvervoltageProtection #UndervoltageProtection #OvercurrentProtection #PortableElectronics #BMSDesign