STMicroelectronics EVL9988 Evaluation Board
STMicroelectronics EVL9988 Evaluation Board is a promotional board for the L9988 device in the battery management system. This evaluation board features measurement of 4 single-cell voltages, with over/undervoltage detection. The board integrates the L9988 BMS device, a complete solution for monitoring, balancing, and protecting battery packs with up to four series-connected Li-ion or Li-polymer cells. This EVL9988 board also incorporates the SPC582B50E1 microcontroller, providing a comprehensive platform for battery management and system control. This evaluation board is ideal for 12V vehicle starters and backup batteries.
Features
- Measurement of 4 single-cell voltages, with over/undervoltage detection
- Measurement of stack voltage, with over/undervoltage detection and plausibility check vs. sum of cells
- Measurement of battery current (range ±1500A), with overcurrent protection
- Measurement of Coulomb counting for SoC estimation
- Continuous short-circuit detection
- Passive cell balancing (maximum 200mA) supporting time-continuous and PWM modes, with synchronized odd-even channels balance
- Measurement of battery pack temperature through an external NTC, with OT/UT detection
- Configurable double watchdog (QandA WD and time-windowed WD)
- Separate the Charge (CHG) and Discharge (DCHG) control paths by integrating a dual high-side VGS pre-driver: one channel drives the discharge high-side driver, while an external pre-driver independently controls the charge high-side driver
- Integrated PMIC with configurable regulators (BOOST, VCORE, VCC, CAN, VSTBY, and VTREF regulators)
- The possibility of interfacing the device via SPI from the MCU located on the EVL998 board
Schematic
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