L9988-TR

12V Li-Ion Battery Management System Solution

Parameters

ECCN US	EAR99
ECCN EU	NEC
Packing Type	Tape And Reel
RoHs compliant	Ecopack2
Grade	Automotive Safety
Package Name	TQFP 80 14x14x1.0 ExPad Down

Description

The L9988 is a multicell battery stack monitor that measures up to four series-connected battery cells with a total measurement error of less than 2 mV. The IC has one battery stack current measurement channel, which can support synchronous current and voltage measurement, performing Coulomb...
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Key features

Key features
AEC-Q100 grade 1 qualified Full ISO26262 compliant, ASIL-D systems ready [4 V÷28 V] Power supply operating range Voltage measurement: 15-bit sigma delta ADC with programmable filter time with cutoff down to 30 Hz Measures 4 single cell voltage, with over/under voltage detection and balance timeout protection Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells Full 0÷5 V measurement range, with total error < ±2 mV in the [1.8 V÷4.5 V] range with -40°C ≤ T_J≤ +105°C Current measurement: 20-bit current sense ADC for battery current measurement (range ± 1500 A), with overcurrent protection Total error < 0.23% for ±200 A, considering 100 µΩ R_SHUNTtypical value (no spread contribution) 20-bit Coulomb counting ADC for SoC estimation Total error < 3.9% for ±100 mA in STANDBY MODE, considering 100 µΩ R_SHUNTtypical value (no spread contribution) Continuously short-circuit detection Passive cell balancing: max 200 mA, supporting time-continuous and PWM modes, with synchronized odd-even channels balance 4 analog inputs measure pack temperature via NTCs, withOT/UT detection; 2 GPIOs are available Ultralow power consumption of 190 µA in STANDBY MODE and 50µA in SLEEP MODE Integrated PMIC with configurable regulators: Boost preregulator to support system full operation at low battery level V_CORE regulator for MCU supply [1.125 V÷5 V] V_CC regulator for MCU ADCs supply [3.3 V/5 V] Fixed 5 V regulator for external CAN power supply V_VSTBY regulator for external RTC supply [3.3 V/5 V] Fixed 5 V V_VTREF regulator to bias external NTCs Integrated dual high-side V_GS predriver: Drive 2 independent groups back-to-back MOSFETs. Switch OFF MOSFETs in case of SC during NORMAL and STANDBY MODE. Standard 4-wire, 4 MHz, 40-bit SPI interface for device configuration and diagnostics data read-out Watchdogs: Configurable double watchdog (Q&A WD and time windowed WD) Real-time clock: selectable timer from 1 s to 180 days Configurable wake-up monitoring OV/UV/OT/OVC/SC Hardware wake-up module: IGN level triggered and WAKE edge triggered Embedded NVM for configuration parameters storage and runtime configuration integrity check Hot plug robustness

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Parameters

ECCN US	EAR99
ECCN EU	NEC
Packing Type	Tape And Reel
RoHs compliant	Ecopack2
Grade	Automotive Safety
Package Name	TQFP 80 14x14x1.0 ExPad Down

Description

Key features

Key features
AEC-Q100 grade 1 qualified Full ISO26262 compliant, ASIL-D systems ready [4 V÷28 V] Power supply operating range Voltage measurement: 15-bit sigma delta ADC with programmable filter time with cutoff down to 30 Hz Measures 4 single cell voltage, with over/under voltage detection and balance timeout protection Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells Full 0÷5 V measurement range, with total error < ±2 mV in the [1.8 V÷4.5 V] range with -40°C ≤ T_J≤ +105°C Current measurement: 20-bit current sense ADC for battery current measurement (range ± 1500 A), with overcurrent protection Total error < 0.23% for ±200 A, considering 100 µΩ R_SHUNTtypical value (no spread contribution) 20-bit Coulomb counting ADC for SoC estimation Total error < 3.9% for ±100 mA in STANDBY MODE, considering 100 µΩ R_SHUNTtypical value (no spread contribution) Continuously short-circuit detection Passive cell balancing: max 200 mA, supporting time-continuous and PWM modes, with synchronized odd-even channels balance 4 analog inputs measure pack temperature via NTCs, withOT/UT detection; 2 GPIOs are available Ultralow power consumption of 190 µA in STANDBY MODE and 50µA in SLEEP MODE Integrated PMIC with configurable regulators: Boost preregulator to support system full operation at low battery level V_CORE regulator for MCU supply [1.125 V÷5 V] V_CC regulator for MCU ADCs supply [3.3 V/5 V] Fixed 5 V regulator for external CAN power supply V_VSTBY regulator for external RTC supply [3.3 V/5 V] Fixed 5 V V_VTREF regulator to bias external NTCs Integrated dual high-side V_GS predriver: Drive 2 independent groups back-to-back MOSFETs. Switch OFF MOSFETs in case of SC during NORMAL and STANDBY MODE. Standard 4-wire, 4 MHz, 40-bit SPI interface for device configuration and diagnostics data read-out Watchdogs: Configurable double watchdog (Q&A WD and time windowed WD) Real-time clock: selectable timer from 1 s to 180 days Configurable wake-up monitoring OV/UV/OT/OVC/SC Hardware wake-up module: IGN level triggered and WAKE edge triggered Embedded NVM for configuration parameters storage and runtime configuration integrity check Hot plug robustness