ARM® Cortex®-M4F STM32G4 Microcontroller IC 32-Bit 170MHz 512KB (512K x 8) FLASH 64-LQFP (10x10) The STM32G491RET6 from STMicroelectronics is a high-performance 32-bit microcontroller based on the Arm® Cortex®-M4 core with Floating Point Unit (FPU), designed for advanced embedded applications requiring high computational performance, precise analog processing, and real-time control. It belongs to the STM32G4 series and integrates enhanced analog peripherals, motor-control timers, communication interfaces, security features, and hardware accelerators such as CORDIC and FMAC. The device operates at up to 170 MHz, provides 512 KB Flash memory, and includes 96 KB SRAM, making it suitable for applications such as motor control, digital power conversion, industrial automation, robotics, and embedded control systems. Key Features Core: Arm® Cortex®-M4 32-bit CPU with FPU, DSP instructions, and MPU Maximum CPU Frequency: Up to 170 MHz (up to 213 DMIPS) Memory: 512 KB Flash memory with ECC support 96 KB SRAM with parity checking features Quad-SPI memory interface Operating Voltage: 1.71 V to 3.6 V Package: LQFP-64 Advanced Analog Features: 3 × 12-bit ADCs with high-speed conversion 4 × 12-bit DAC channels 4 × Rail-to-Rail operational amplifiers 4 × Fast analog comparators Internal voltage reference buffer Hardware Accelerators: CORDIC accelerator for trigonometric calculations FMAC (Filter Math Accelerator) for digital filtering applications Timers & Motor Control: Advanced PWM timers for motor-control applications Multiple 16-bit and 32-bit timers Support for encoder and PWM control Communication Interfaces: 2 × FDCAN interfaces 5 × USART/UART 3 × SPI interfaces 3 × I²C interfaces USB 2.0 Full-Speed interface SAI audio interface Security Features: True Random Number Generator (TRNG) CRC calculation unit Unique device ID Debug & Programming: SWD and JTAG debugging support Typical Applications Motor control and BLDC controllers Digital power converters Industrial automation equipment Robotics and motion control Smart sensors and embedded control systems Power management applications #STM32G491RET6 #STM32G4 #STMicroelectronics #ARM_CortexM4 #Microcontroller #MCU #EmbeddedSystems #MotorControl #DigitalPower #IndustrialAutomation #Robotics #IoT #ElectronicsDesign #PCBDesign

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