Battery Management
Products (19)
ADBMS6948 - 16-Channel Battery Monitor | Analog Devices
The ADBMS6948 is a 16-channel battery pack monitoring system from Analog Devices, designed for measuring up to 16 series-connected battery cells with exceptional accuracy. It features the industry's first parallel measurement architecture, enabling simultaneous cell voltage and pack current measurements. The device achieves a total measurement error (TME) of less than 3 mV over the full temperature range and lifetime, making it suitable for demanding automotive and energy storage applications. The ADBMS6948 operates over a measurement range of -2.5V to 5.5V, supporting various battery chemistries including NMC and LFP. It is available in a 64-lead LFCSP-SS (9x9 mm) package. A battery pack monitoring system is an integrated circuit that measures the voltage, current, and temperature of individual cells in a battery pack to ensure safe and efficient operation. It is a critical component in battery management systems (BMS), which are used in electric vehicles, energy storage systems, and backup power supplies. The ADBMS6948 belongs to the category of battery monitoring ICs, which are part of the broader power management integrated circuit (PMIC) family. These devices provide essential data for state-of-charge (SoC) and state-of-health (SoH) estimation, cell balancing, and protection against overvoltage, undervoltage, and overcurrent conditions. Key features of the ADBMS6948 include synchronous pack current and cell voltage measurements, short/over current detection with less than 2 μs response time, programmable detection time and threshold, dedicated outputs for MOSFET/contactor control, redundant measurement, algorithm, and fault pin, 10 general-purpose I/O (GPIO) channels, cell and board temperature measurements, and pack, load, and system diagnostic measurements. The device also includes an SPI interface with a maximum operating frequency of [DATA_NEEDED: SPI max frequency] MHz, enabling high-speed communication with a host microcontroller. The ADBMS6948's parallel measurement architecture is a significant advancement over traditional sequential measurement systems, as it allows simultaneous sampling of all cell voltages and pack current, improving the accuracy of power and energy calculations. This is particularly important in applications where load transients can cause voltage fluctuations, as the synchronous measurement ensures that the voltage and current readings are time-aligned. The device also features a dedicated FAULTB pin that generates an interrupt when any preprogrammed over or under thresholds on cell voltage, cell temperature, or delta measurements are violated, providing immediate fault notification to the system controller. Typical applications for the ADBMS6948 include mild hybrid electric vehicles, two-wheeler and three-wheeler electric vehicles, four-wheeler electric vehicle auxiliary batteries, backup battery systems, and energy storage systems (ESS). Its high accuracy and robust feature set make it ideal for automotive battery management, where safety and reliability are paramount. The device's ability to measure both cell voltages and pack current synchronously enables precise state-of-charge estimation, which is essential for maximizing battery life and performance. When designing with the ADBMS6948, it is important to consider the PCB layout to minimize noise and ensure accurate measurements. The device requires careful decoupling of the power supply and proper grounding to achieve the specified TME. Additionally, the SPI interface should be isolated if the battery pack is at a high potential relative to the host controller, using components such as the ADuM1441ARWZ digital isolator. The ADBMS6948 is recommended for new designs, indicating that it is a current product with ongoing support from Analog Devices.
L9678-TR - Automotive Airbag System IC | STMicroelectronics
The L9678-TR is a highly integrated automotive airbag system IC from STMicroelectronics, designed for safety-critical restraint systems. It combines a high-voltage squib driver, a 3.3V/5V voltage regulator, and a PSI5 interface in a single package, enabling compact and reliable airbag control unit designs. The device operates over a wide supply voltage range and is qualified to AEC-Q100 for automotive applications. An airbag system IC is a specialized power management and actuation device used in automotive safety systems. It integrates the high-voltage drivers that fire the squib (the initiator that inflates the airbag), along with the power supply regulation and communication interfaces needed to coordinate with the central airbag control unit. This integration reduces component count, PCB area, and system cost while improving reliability. Key features of the L9678-TR include a high-voltage squib driver capable of delivering the required firing current, an integrated voltage regulator providing stable 3.3V or 5V output for the microcontroller and sensors, and a PSI5 interface for connecting peripheral satellite sensors. The device also includes comprehensive diagnostic and protection features, such as overcurrent, overvoltage, and thermal shutdown, ensuring safe operation in harsh automotive environments. The L9678-TR is built on STMicroelectronics' robust automotive process technology, ensuring high reliability and long-term availability. Its architecture supports both driver and passenger airbag configurations, as well as side and curtain airbags, making it a versatile solution for modern vehicle safety systems. The device is available in a compact package suitable for surface-mount assembly, and its pinout is optimized for efficient PCB layout. Typical applications include driver and passenger airbag control units, side and curtain airbag systems, and seatbelt pretensioner systems. The L9678-TR is also suitable for other pyrotechnic actuation applications, such as battery disconnect switches in electric vehicles. Its integrated PSI5 interface simplifies the connection of satellite sensors, reducing wiring complexity and improving system reliability. When designing with the L9678-TR, it is essential to follow the manufacturer's guidelines for PCB layout, especially regarding the high-voltage squib driver traces and the thermal management of the integrated regulator. Proper decoupling and filtering of the power supply are critical to ensure stable operation and to meet electromagnetic compatibility (EMC) requirements. The device's diagnostic features should be utilized to implement robust fault detection and reporting in the system software.
L9780-TR - Automotive Airbag System IC | STMicroelectronics
The L9780-TR is a highly integrated automotive airbag system IC manufactured by STMicroelectronics. It is designed to meet the stringent safety and reliability requirements of modern vehicle occupant protection systems. The device integrates multiple functions essential for airbag deployment, including squib driver circuits, a high-voltage DC-DC boost converter, and a serial peripheral interface (SPI) for communication with the central airbag control unit (ACU). The L9780-TR is available in a compact surface-mount package, making it suitable for space-constrained automotive electronic control units (ECUs). An airbag system IC is a specialized power management and actuation device that controls the deployment of airbags in a vehicle. It typically includes squib drivers that provide the precise current pulse needed to ignite the airbag inflator, a boost converter to generate the high voltage required for deployment, and diagnostic circuitry to ensure system readiness. The L9780-TR sits within the broader hierarchy of automotive safety electronics, which includes sensors, the ACU, and the airbag modules themselves. As a critical safety component, it must comply with stringent automotive standards such as AEC-Q100 and ISO 26262. Key features of the L9780-TR include multiple squib driver channels, each capable of delivering a controlled deployment current, and an integrated DC-DC boost converter that generates the high voltage (typically 20-35V) needed for squib firing. The device also includes comprehensive diagnostic functions, such as open-load and short-to-battery detection, which are essential for ensuring system integrity. The SPI interface allows the microcontroller to configure the device and read status registers, enabling real-time monitoring and fault management. From a technical perspective, the L9780-TR leverages STMicroelectronics' advanced BCD (Bipolar-CMOS-DMOS) process technology, which combines high-voltage capability with low-power digital logic. This architecture enables efficient power conversion and precise current control while maintaining low quiescent current for battery-powered automotive applications. The device is designed to operate over a wide input voltage range, typically from 6V to 18V, accommodating both 12V and 24V vehicle electrical systems. Its thermal management is optimized for the high peak currents during deployment, with a package designed to dissipate heat effectively. Typical applications for the L9780-TR include driver and passenger airbag systems, side airbags, curtain airbags, and seatbelt pretensioners. In these systems, the L9780-TR ensures reliable and timely deployment, which is critical for occupant safety. The device is also used in advanced driver assistance systems (ADAS) that require pyrotechnic actuators for pedestrian protection or battery disconnect. When designing with the L9780-TR, engineers must pay careful attention to the layout of the high-voltage boost converter and the squib driver outputs. Proper grounding and decoupling are essential to minimize noise and ensure stable operation. Additionally, the SPI interface must be configured correctly to enable diagnostic features and avoid unintended deployments. The device's safety features, such as over-temperature and over-current protection, should be considered in the system design to enhance overall reliability.
L9963 - Automotive Li-ion Battery Monitor IC | STMicroelectronics
The L9963 is a Li-ion battery monitoring and protection chip designed for high-reliability automotive applications and energy storage systems. It can monitor up to 14 stacked battery cells, meeting the requirements of 48 V and higher voltage systems. Each cell voltage is measured with high accuracy, and the device also supports on-chip coulomb counting for current measurement. The L9963 is housed in a 64-TQFP-EP (10x10) package, making it suitable for space-constrained automotive battery management systems (BMS). A battery monitoring IC (BMIC) is a specialized integrated circuit that measures the voltage, current, and temperature of individual cells in a battery pack. It is a critical component in battery management systems, which ensure safe and efficient operation of lithium-ion batteries. The BMIC sits between the battery cells and the microcontroller (MCU), providing accurate data for state-of-charge (SoC) and state-of-health (SoH) estimation. In the hierarchy of power management, a BMIC is a type of analog front-end (AFE) IC, which falls under the broader category of battery management ICs, which are part of power management integrated circuits (PMICs). Key features of the L9963 include high-accuracy cell voltage measurement, on-chip coulomb counting for current sensing, and a comprehensive set of fault detection and notification functions to meet safety standard requirements. The device is designed for automotive applications, ensuring robust operation in harsh environments. It supports up to 14 cells in series, enabling use in 48 V and higher voltage battery systems. The L9963 also features a voltage regulator and bootstrap circuitry to generate stable internal references, ensuring measurement accuracy. From a technical perspective, the L9963 utilizes a precision analog front-end architecture with two internal bandgaps that are constantly monitored to guarantee measurement accuracy. The device can be supplied directly from the battery it monitors, simplifying system design. It includes a comprehensive fault detection mechanism, including overvoltage, undervoltage, and temperature monitoring, which is essential for meeting automotive safety standards such as ISO 26262. The L9963 is designed to work with the L9963E and L9963F variants, which offer enhanced features for specific applications. Typical applications include electric vehicles (EVs), hybrid electric vehicles (HEVs), and energy storage systems (ESS). In an EV battery pack, the L9963 monitors each cell's voltage and temperature, providing data to the BMS controller for balancing and protection. In ESS, it ensures safe operation of large-scale battery banks. The device's high accuracy and robust fault detection make it ideal for these safety-critical applications. When designing with the L9963, it is important to consider the external components required for the voltage regulator and bootstrap circuitry. Proper PCB layout is critical to minimize noise and ensure accurate voltage measurements. Additionally, the device's communication interface should be carefully designed to ensure reliable data transfer in noisy automotive environments.
L9963-TR - Automotive Battery Monitoring IC | STMicroelectronics
The L9963-TR is a highly integrated automotive-grade battery monitoring and balancing IC from STMicroelectronics, designed for lithium-ion battery packs in electric vehicles (EVs), hybrid electric vehicles (HEVs), and energy storage systems. It provides precise cell voltage and temperature measurement, passive cell balancing, and robust communication interfaces, all in a compact TQFP-64 package. A battery monitoring IC (BMIC) is a specialized analog front-end that measures the voltage of each cell in a battery pack, monitors temperature, and controls balancing to ensure safe and efficient operation. It sits between the battery cells and the host microcontroller, converting analog cell voltages into digital data via an ADC and communicating over a serial interface. In the system hierarchy, the BMIC is part of the battery management system (BMS), which is a critical subsystem in automotive power electronics. Key features of the L9963-TR include 14-cell voltage measurement capability, a 16-bit ADC with high accuracy, and a built-in passive balancing function with up to 150 mA balancing current. It supports both SPI and daisy-chain communication, enabling scalable battery packs. The device operates over a wide supply voltage range and includes comprehensive diagnostic features such as overvoltage, undervoltage, and temperature monitoring, making it suitable for ISO 26262 functional safety applications. The L9963-TR is built on STMicroelectronics' robust automotive process technology, ensuring high reliability across the -40°C to +125°C temperature range. Its architecture includes a precision voltage reference, a multiplexed ADC, and a state machine for balancing control. The daisy-chain interface allows multiple devices to be connected in series, reducing wiring complexity in high-voltage battery packs. Typical applications include battery management systems for EVs, HEVs, and industrial energy storage. The device is also used in 48V mild-hybrid systems and backup power supplies. Its high accuracy and safety features make it ideal for applications where cell voltage monitoring is critical for battery longevity and safety. When designing with the L9963-TR, ensure proper PCB layout for the analog measurement paths to minimize noise, and use appropriate filtering on the cell inputs. The device requires careful thermal management when balancing current is high, and the SPI interface should be isolated if the host controller is not on the same ground reference.
L9964 - Automotive Battery Monitoring IC | STMicroelectronics
The STMicroelectronics L9964 is a highly integrated automotive battery monitoring and protection IC designed for 12V lead-acid and lithium-ion battery systems. It provides precise voltage, current, and temperature sensing, along with cell balancing and protection features, in a compact TSSOP-20 package. The device operates over a wide supply voltage range of 4.5V to 40V, making it suitable for automotive and industrial battery management applications. A battery monitoring IC is a specialized analog front-end that measures individual cell voltages, pack current, and temperature to enable state-of-charge (SoC) and state-of-health (SoH) estimation. It sits between the battery pack and the microcontroller, converting analog battery parameters into digital data via an integrated ADC. The L9964 belongs to the battery management IC category, which is a subset of power management ICs used in automotive, industrial, and consumer battery systems. Key features of the L9964 include a 16-bit delta-sigma ADC for high-accuracy voltage and current measurement, an integrated current sense amplifier with programmable gain, and a temperature sensor input. It supports passive cell balancing with internal MOSFETs, and includes overvoltage, undervoltage, overcurrent, and overtemperature protection. The device communicates via an SPI interface, enabling fast and reliable data transfer to the host microcontroller. The L9964 is built on STMicroelectronics' automotive-grade BCD (Bipolar-CMOS-DMOS) process technology, ensuring high reliability and robustness in harsh environments. It features a low-power sleep mode with a quiescent current of 10 uA, extending battery life in standby conditions. The device is AEC-Q100 qualified, meeting the stringent quality and reliability requirements of the automotive industry. Typical applications include automotive battery management systems (BMS) for start-stop vehicles, electric vehicles (EVs), and 48V mild-hybrid systems. It is also used in industrial battery backup systems, energy storage systems, and uninterruptible power supplies (UPS). The L9964's high accuracy and integrated protection make it ideal for applications where battery safety and longevity are critical. When designing with the L9964, ensure proper decoupling of the supply pins and careful PCB layout to minimize noise on the analog sense lines. The SPI interface should be isolated from high-current switching paths to prevent data corruption. Additionally, the thermal pad must be soldered to a copper pour for adequate heat dissipation during cell balancing operations.
L9964-TR - Automotive Battery Monitoring IC | STMicroelectronics
The L9964-TR is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid and lithium-ion battery systems. It integrates a high-voltage input, precision voltage and current sensing, and a robust SPI interface for communication with a host microcontroller. The device operates over a wide supply range and is housed in a compact surface-mount package, making it suitable for space-constrained automotive battery management systems (BMS). A battery monitoring IC is a specialized analog front-end that measures cell voltages, pack currents, and temperatures to estimate state-of-charge (SoC) and state-of-health (SoH). It sits between the battery pack and the host controller, converting raw analog signals into digital data via an SPI or I2C interface. In the system hierarchy, it belongs to the battery management IC category, which is part of the broader power management IC family, ultimately serving the automotive electronics domain. Key features of the L9964-TR include a wide operating voltage range, high-accuracy voltage measurement, and integrated current sensing with programmable gain. It supports both lead-acid and lithium-ion chemistries, offering flexibility across different battery types. The device also includes built-in diagnostics and protection features, such as overvoltage and undervoltage detection, which are critical for automotive safety. Technically, the L9964-TR employs a precision analog front-end with a 16-bit ADC for voltage and current measurement, ensuring accurate SoC estimation. Its SPI interface operates at speeds up to 5 MHz, enabling fast data transfer to the host MCU. The device is designed to meet AEC-Q100 automotive qualification, ensuring reliability under harsh operating conditions, including temperature extremes from -40°C to +125°C. Typical applications include automotive start-stop systems, electric vehicle (EV) battery management, and industrial energy storage systems. In a start-stop system, the L9964-TR monitors the 12V battery to ensure reliable engine restart and to manage the increased electrical load during idle-stop. Its high accuracy and low power consumption make it ideal for always-on monitoring in vehicles. When designing with the L9964-TR, ensure proper decoupling on the supply pins and place the device close to the battery sense points to minimize noise. The SPI lines should be routed with controlled impedance to avoid signal integrity issues. Additionally, the device's thermal pad must be soldered to a copper pour for adequate heat dissipation, especially in high-current applications.
L9965A - Automotive Battery Monitoring IC | STMicroelectronics
The L9965A is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid battery systems in vehicles. It integrates a high-voltage analog front-end, a 12-bit ADC, and a LIN transceiver, enabling precise measurement of battery voltage, current, and temperature. The device operates from a supply voltage of 4.5V to 36V and is available in a compact VQFN-32 package, making it suitable for space-constrained automotive battery management systems (BMS). What is a battery monitoring IC? A battery monitoring IC is a specialized integrated circuit that measures and reports the state of a battery, including voltage, current, temperature, and state-of-charge (SoC). It is a critical component in battery management systems (BMS), which ensure safe and efficient battery operation. In the system hierarchy, a battery monitoring IC belongs to the battery management IC category, which is part of the broader power management IC family. These ICs are essential in automotive, industrial, and consumer applications where battery health and safety are paramount. Key features of the L9965A include a 12-bit ADC with a measurement accuracy of ±1%, a LIN transceiver compliant with LIN 2.2A, and a wide operating temperature range of -40°C to +125°C. The device also features a programmable watchdog timer, a 16-bit CRC for data integrity, and a low-power sleep mode with a quiescent current of 10 µA. These features enable reliable and accurate battery monitoring in harsh automotive environments. Technically, the L9965A employs a precision bandgap reference and a successive-approximation register (SAR) ADC architecture to achieve high measurement accuracy. The integrated LIN transceiver supports communication with the vehicle's body control module (BCM) at data rates up to 20 kbps. The device also includes a 5V regulator output for powering external sensors, enhancing its versatility in BMS designs. Typical applications include automotive start-stop systems, battery state-of-health (SoH) monitoring, and aftermarket battery management systems. The L9965A's high accuracy and robust communication interface make it ideal for monitoring lead-acid batteries in vehicles, where precise voltage and current measurements are critical for engine start-stop decisions and battery longevity. When designing with the L9965A, ensure proper decoupling of the supply pins and place the device close to the battery sense points to minimize noise. The LIN bus requires a 1kΩ pull-up resistor to the battery voltage, and the watchdog timer should be configured according to the system's communication schedule to avoid false resets.
L9965C - Automotive Battery Monitoring IC | STMicroelectronics
The L9965C is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid battery systems in vehicles. It integrates a high-voltage analog front-end, a 12-bit ADC, and a LIN transceiver, enabling precise measurement of battery voltage, current, and temperature for state-of-charge (SoC) and state-of-health (SoH) estimation. The device operates from a supply voltage of 4.5V to 28V and is available in a 32-pin TQFP package, making it suitable for space-constrained automotive electronic control units (ECUs). A battery monitoring IC is a specialized analog front-end that measures key battery parameters—voltage, current, and temperature—and communicates them to a microcontroller for battery management. In the system hierarchy, the L9965C sits between the battery pack and the vehicle's body control module (BCM), acting as the sensing and communication bridge. It belongs to the broader category of power management ICs, specifically within battery management systems (BMS), which are critical for ensuring battery safety, longevity, and performance in automotive applications. Key features of the L9965C include a 12-bit ADC with a sampling rate of up to 1 kSPS, a LIN transceiver compliant with LIN 2.2A, and a wide operating temperature range of -40°C to +125°C. The device also integrates a 5V/50mA low-dropout regulator (LDO) for powering external sensors, and a 16-bit timer for time-stamping events. These features enable accurate battery monitoring and robust communication in harsh automotive environments. Technically, the L9965C employs a precision voltage reference and a chopper-stabilized amplifier to achieve high measurement accuracy, with a voltage measurement error of ±10 mV and a current measurement error of ±1%. The LIN transceiver supports both master and slave modes, with a data rate of up to 20 kbps, and includes built-in ESD protection up to ±8 kV (HBM). The device is AEC-Q100 qualified, ensuring reliability for automotive applications. Typical applications include start-stop systems, battery management in electric vehicles (EVs), and battery monitoring in commercial vehicles. In a start-stop system, the L9965C measures battery voltage and current to determine when to restart the engine, improving fuel efficiency. In EVs, it provides critical data for battery pack monitoring, ensuring safe operation and extending battery life. When designing with the L9965C, ensure proper decoupling of the supply pins with a 100 nF ceramic capacitor placed close to the device. The LIN bus requires a 1 kΩ series resistor and a 220 pF capacitor for EMC compliance. Also, consider the thermal performance of the TQFP-32 package, which has a thermal resistance of 40°C/W, and provide adequate copper pour for heat dissipation in high-current applications.
L9965P - Automotive Battery Monitoring IC | STMicroelectronics
The STMicroelectronics L9965P is a highly integrated automotive battery monitoring and protection IC designed for 12V lead-acid battery systems. It provides precise voltage, current, and temperature monitoring, along with MOSFET-based protection and charge control, all in a compact TQFP-64 package. The device operates over a wide supply voltage range of 6V to 18V and is AEC-Q100 qualified for automotive applications. A battery monitoring IC is a specialized analog front-end that measures the state of a battery by sensing voltage, current, and temperature, and communicates this data to a microcontroller. It is a critical component in automotive power management systems, enabling functions such as state-of-charge estimation, overvoltage/undervoltage protection, and charge control. The L9965P sits within the hierarchy of power management ICs, specifically under battery management and protection, and is essential for ensuring the safety and longevity of lead-acid batteries in vehicles. Key features of the L9965P include a 16-bit delta-sigma ADC for high-resolution current and voltage sensing, an integrated charge pump for driving external N-channel MOSFETs, and a flexible SPI interface for communication with the host microcontroller. It also includes a programmable watchdog timer, multiple fault detection circuits, and a low-power sleep mode to minimize quiescent current draw when the vehicle is off. The L9965P employs a robust architecture with redundant sensing paths and built-in self-test capabilities, ensuring reliable operation in harsh automotive environments. Its integrated charge pump allows the use of low-cost N-channel MOSFETs for battery disconnect and charge control, reducing system cost and complexity. The device is designed to meet stringent automotive EMC and ESD requirements, making it suitable for direct connection to the battery terminals. Typical applications include start-stop systems, battery management for electric vehicles, and aftermarket battery monitoring modules. In a start-stop system, the L9965P monitors battery state to enable automatic engine restart, while in EV battery management, it provides accurate state-of-charge data for range estimation. The device's wide operating temperature range of -40°C to +125°C ensures reliable performance in under-hood environments. When designing with the L9965P, careful attention must be paid to the PCB layout for the sense resistor and MOSFET driver paths to minimize parasitic inductance and ensure accurate current sensing. The SPI interface should be isolated or filtered to prevent noise coupling from the battery lines. Additionally, the watchdog timer should be configured appropriately to avoid false resets during normal operation.
L9965T - Automotive Battery Monitoring IC | STMicroelectronics
The L9965T is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid battery systems in vehicles. It integrates voltage sensing, current sensing, and temperature monitoring in a single package, enabling precise state-of-charge (SoC) and state-of-health (SoH) estimation. The device operates over a wide supply voltage range and communicates via a serial interface, making it suitable for battery management systems (BMS) in start-stop, micro-hybrid, and electric vehicle applications. A battery monitoring IC is a specialized analog front-end that measures battery voltage, current, and temperature to estimate battery state. It sits between the battery and the microcontroller in a BMS, converting raw analog signals into digital data for processing. The L9965T belongs to the battery management IC category, which is part of the broader power management IC family. This hierarchy is essential for understanding its role in automotive electronics. Key features of the L9965T include high-accuracy voltage measurement, integrated current sensing with programmable gain, and temperature sensing via external NTC thermistors. It supports a wide operating temperature range of -40°C to +125°C, making it suitable for under-hood automotive environments. The device also includes diagnostic features such as open-wire detection and overvoltage/undervoltage thresholds, enhancing system reliability. Technically, the L9965T uses a precision ADC with a reference voltage to digitize battery parameters. It communicates with the host microcontroller via an SPI or I2C interface, depending on the configuration. The IC is designed to operate from the battery supply directly, with an internal LDO for its own power, reducing external component count. Its low quiescent current is critical for minimizing battery drain in parked vehicles. Typical applications include automotive start-stop systems, where the battery must be monitored to ensure reliable engine restart, and electric vehicle (EV) battery management, where accurate SoC estimation extends battery life. The L9965T is also used in industrial backup power systems and telematics units that require battery health monitoring. When designing with the L9965T, ensure proper decoupling of the power supply pins and place the sense resistors close to the IC to minimize parasitic inductance. The SPI interface should be isolated if the battery voltage exceeds the microcontroller's logic levels. Also, consider the thermal performance of the package, as the IC may dissipate power during high-current sensing.
L9967 - Automotive Battery Monitoring IC | STMicroelectronics
The L9967 is an automotive-grade battery monitoring and balancing IC from STMicroelectronics, designed for 12V lead-acid and lithium-ion battery management systems (BMS). It integrates high-precision voltage and current sensing, cell balancing, and temperature monitoring in a compact QFN package. The device operates over a wide supply voltage range and communicates via SPI, making it suitable for automotive and industrial battery management applications. A battery monitoring IC is a specialized analog front-end (AFE) that measures individual cell voltages, pack current, and temperature to estimate state-of-charge (SoC) and state-of-health (SoH). It sits between the battery pack and the host microcontroller, providing accurate telemetry for charge control, protection, and balancing algorithms. In the system hierarchy, the L9967 is a battery management IC (BMIC) within the broader power management IC (PMIC) category, essential for ensuring battery safety and longevity. Key features of the L9967 include high-accuracy voltage measurement (typically ±10 mV), current sensing with integrated shunt amplifier, and passive cell balancing with internal MOSFETs. It supports up to 14 series cells and includes a 16-bit delta-sigma ADC for precise measurements. The device also features a programmable watchdog timer, overvoltage/undervoltage protection, and a robust SPI interface for daisy-chaining multiple devices. Technically, the L9967 employs a precision bandgap reference and a delta-sigma ADC architecture to achieve high measurement accuracy across temperature. Its integrated balancing FETs allow passive balancing currents up to 300 mA, reducing external component count. The device is AEC-Q100 qualified, ensuring reliability in harsh automotive environments, and operates from -40°C to +125°C. Typical applications include electric vehicle (EV) battery management, 48V mild-hybrid systems, and industrial energy storage. In an EV BMS, the L9967 monitors each cell group, communicates with the main controller via SPI, and triggers balancing during charging. Its high accuracy enables precise SoC estimation, extending battery life and ensuring safe operation. When designing with the L9967, ensure proper decoupling on the supply pins and a solid ground plane for accurate measurements. The SPI interface should be isolated if the battery pack is referenced to a different ground. Also, consider thermal management for the balancing FETs, as continuous balancing can dissipate significant power.
L9967-TR - Automotive Battery Monitoring IC | STMicroelectronics
The L9967-TR is an automotive-grade battery monitoring and balancing IC from STMicroelectronics, designed for 12V lead-acid and lithium-ion battery systems. It integrates a high-voltage analog front-end for cell voltage and temperature measurement, a 16-bit delta-sigma ADC, and a passive cell balancing controller. The device operates from a 6V to 72V supply range and communicates via SPI, making it suitable for battery management systems (BMS) in electric vehicles, hybrid vehicles, and industrial energy storage. A battery monitoring IC is a specialized analog front-end that measures individual cell voltages, temperatures, and pack current to enable state-of-charge (SoC) and state-of-health (SoH) estimation. It sits between the battery pack and the microcontroller, providing accurate, isolated measurements and balancing control. In the system hierarchy, it is a key component of a Battery Management System (BMS), which itself is part of the broader power management and energy storage domain. Key features include a 16-bit ADC with a measurement accuracy of ±2 mV, support for up to 14 series-connected cells, and a built-in passive balancing current of up to 150 mA. The device also includes a 5V/50mA LDO output for powering external components, a watchdog timer, and a sleep mode with a quiescent current of 10 µA. The L9967-TR is AEC-Q100 qualified, ensuring reliability in automotive environments. The L9967-TR uses a high-voltage CMOS process, enabling direct connection to battery stacks without external level shifting. Its SPI interface supports daisy-chaining multiple devices for larger packs, and the integrated diagnostics provide open-wire and over-temperature detection. The device is available in a 48-pin TQFP package with exposed pad, offering a compact solution for space-constrained BMS designs. Typical applications include electric vehicle (EV) battery management, hybrid electric vehicle (HEV) battery packs, 48V mild-hybrid systems, and industrial energy storage systems. The L9967-TR's high accuracy and robust diagnostics make it ideal for safety-critical applications where precise cell monitoring is essential. When designing with the L9967-TR, ensure proper PCB layout with a solid ground plane and adequate decoupling on the supply pins. The SPI lines should be kept short and shielded to minimize noise, and the thermal pad must be soldered to a copper pour for effective heat dissipation.
L9983 - Automotive Li-ion Battery Monitor & Protector | STMicroelectronics
The STMicroelectronics L9983 is a Li-ion battery monitoring and protection chip designed for high-reliability automotive applications and energy storage systems. It integrates passive balancing with programmable channel selection, nine GPIOs for external monitoring and control, and a comprehensive set of fault detection and notification functions to meet safety standard requirements. The device is available in a 64-TQFP-EP (10x10) package, suitable for surface-mount assembly. A battery monitoring IC is a specialized integrated circuit that measures the voltage, current, and temperature of individual cells in a battery pack, enabling state-of-charge (SoC) and state-of-health (SoH) estimation, cell balancing, and protection against overvoltage, undervoltage, and overtemperature conditions. In the hierarchy of battery management systems (BMS), the monitoring IC sits at the cell interface layer, providing accurate data to the system controller, which then manages charging, discharging, and balancing algorithms. The L9983 is a critical component in automotive BMS, ensuring safe and efficient operation of Li-ion battery packs in electric vehicles (EVs), hybrid electric vehicles (HEVs), and stationary energy storage systems. Key features of the L9983 include passive balancing with programmable channel selection, which can operate in both normal and low-power (silent) modes, with automatic termination based on an internal timer. The device integrates nine GPIOs for external monitoring and control, allowing flexible system design. It also provides a comprehensive fault detection and notification mechanism, including overvoltage, undervoltage, overtemperature, and communication faults, which are essential for meeting automotive safety standards such as ISO 26262. The L9963 supports isolated SPI communication, enabling daisy-chaining of multiple devices for high-cell-count battery packs. From a technical architecture perspective, the L9983 employs a high-accuracy ADC for cell voltage measurement, with a typical accuracy of ±2 mV, and supports up to 14 cells in series. The device operates from a supply voltage range of 6V to 60V, making it suitable for 12V to 48V battery systems. The integrated balancing FETs allow passive balancing currents of up to 150 mA per channel, with programmable balancing timers. The device also features a low-power mode with a quiescent current of typically 10 µA, enabling always-on monitoring in automotive applications. Typical applications include battery management systems for electric vehicles, hybrid electric vehicles, and energy storage systems. The L9983 is also used in industrial battery backup systems and uninterruptible power supplies (UPS). Its high accuracy and robust fault detection make it ideal for applications requiring reliable battery monitoring and protection. When designing with the L9983, ensure proper PCB layout for thermal management, as the 64-TQFP-EP package has an exposed pad that must be soldered to a thermal via array. Additionally, use appropriate isolation for SPI communication when daisy-chaining multiple devices, and configure the balancing timers according to the battery chemistry and capacity.
L9988 - 12V Li-Ion Battery Management System Solution | STMicroelectronics
The L9988 is a multicell battery stack monitor and protection IC from STMicroelectronics, designed for 12V Li-Ion battery management systems (BMS) in automotive and industrial applications. It measures up to 4 series-connected battery cells with a total measurement error of less than 2 mV, and supports cell voltage measurement from 0 V to 5 V, making it suitable for most battery chemistries. The device is packaged in a TQFP80-EP (exposed pad) package and is RoHS compliant. A battery management system (BMS) is an electronic system that manages a rechargeable battery pack, monitoring its state, calculating secondary data, reporting that data, protecting the battery from operating outside its safe operating area, and controlling its environment. The L9988 is a dedicated BMS IC that integrates cell monitoring, balancing, and protection functions, targeting up to ASIL-D safety levels in demanding systems. It sits within the hierarchy of power management ICs, specifically in the battery management subsystem, and is essential for ensuring the safety, reliability, and longevity of Li-Ion battery packs. Key features of the L9988 include dedicated high-precision ADCs that synchronously acquire cell and pack voltages, ensuring accurate and simultaneous measurement. It integrates timed and PWM-based odd-even passive balancing for each cell, which helps equalize cell voltages and extend pack life. The device also includes 4 analog inputs for external NTC thermistor connection and 2 general-purpose I/Os, providing flexibility for temperature monitoring and system control. The L9988 can be powered directly from the battery stack, and its programmable voltage regulators can supply all system components, including the MCU, CAN transceiver, and NTCs. The L9988 also integrates a dual predriver for driving two independent groups of circuit breaker (CB) back-to-back MOSFETs, enabling safe connection and disconnection of the battery pack. This feature is critical for protecting the pack from overcurrent, overvoltage, and other fault conditions. The device is designed to achieve up to ASIL-D targets, making it suitable for automotive safety-critical applications. Typical applications include automotive 12V Li-Ion battery packs for start-stop systems, mild hybrid vehicles, and industrial battery backup systems. The L9988's high accuracy and integrated protection features make it ideal for ensuring safe and efficient battery operation in these demanding environments. When designing with the L9988, it is important to consider the thermal performance of the TQFP80-EP package and ensure adequate PCB copper area for heat dissipation. Additionally, proper layout of the cell sense traces and careful selection of external components, such as balancing resistors and MOSFETs, are critical for achieving optimal performance and safety.
LT1511CS8#PBF - 3A Multi-Chemistry Battery Charger | Analog Devices
The LT1511CS8#PBF is a constant-current/constant-voltage (CC/CV) PWM battery charger IC from Analog Devices (formerly Linear Technology), designed to charge multi-chemistry batteries including Li-Ion, NiCd, NiMH, and Lead-Acid. It delivers up to 3A charge current with input current limiting, making it suitable for a wide range of portable and industrial charging applications. The device operates from input voltages up to 25V (28V absolute maximum per Newark) and supports battery charge voltages up to 20V, accommodating 1-3 series cells. It is available in an 8-pin SOIC package (CS8), which is a compact surface-mount option for space-constrained designs. A battery charger IC is a specialized power management integrated circuit that controls the charging process of rechargeable batteries, ensuring safety and longevity by regulating charge current and voltage. The LT1511 belongs to the family of switch-mode battery chargers, which use a PWM (pulse-width modulation) topology to efficiently convert input power to the battery. This places it within the broader hierarchy of power management ICs, specifically under battery management and charging solutions. Unlike linear chargers, switch-mode chargers like the LT1511 offer higher efficiency, especially when the input voltage is significantly higher than the battery voltage, reducing heat dissipation and enabling faster charging. Key features of the LT1511CS8#PBF include its constant-current/constant-voltage charging algorithm, which is essential for Li-Ion batteries that require a controlled current phase followed by a constant voltage phase. The input current limiting feature allows the charger to draw a maximum current from the input supply, preventing overloading of wall adapters or USB ports. The device also includes a sense resistor for accurate current sensing and a programmable charge current via an external resistor. The 8-pin SOIC package provides a small footprint, and the device operates over a commercial temperature range of 0°C to 70°C. Technically, the LT1511 uses a current-mode PWM architecture, which provides excellent line and load regulation. The switching frequency is internally set, and the device includes a shutdown pin for power management. The charger can be configured for different battery chemistries by adjusting the external components, such as the sense resistor and voltage divider. The input current limiting is particularly useful in applications where the input source has a limited current capability, such as a USB port or a solar panel. Typical applications include portable devices, power tools, medical equipment, and industrial battery backup systems. The LT1511 is also suitable for charging lead-acid batteries in automotive and UPS applications, where its robust input voltage range and current limiting are advantageous. When designing with this device, it is important to select the appropriate sense resistor and inductor for the desired charge current and switching frequency, and to ensure proper thermal management, as the power dissipation in the IC can be significant at high charge currents.
LT1511CS8#TRPBF - 3A Battery Charger IC | Analog Devices
The LT1511CS8#TRPBF is a constant-current/constant-voltage battery charger IC from Analog Devices, designed for multi-chemistry battery charging applications. It delivers up to 3A of charge current with input current limiting, making it suitable for a wide range of portable and industrial devices. The device operates from a 4.5V to 30V input voltage range and features a programmable charge current, making it flexible for various battery configurations. A battery charger IC is a specialized power management integrated circuit that controls the charging of rechargeable batteries, ensuring safe and efficient charging by regulating voltage and current. The LT1511CS8#TRPBF belongs to the category of linear battery chargers, which are part of the broader power management IC family. These devices are essential in applications where battery life and safety are critical, such as in portable electronics, medical devices, and industrial equipment. Key features of the LT1511CS8#TRPBF include a 3A maximum charge current, constant-current/constant-voltage charging algorithm, and input current limiting. The device also includes a precision reference for accurate voltage regulation and a low-dropout design that maximizes charging efficiency. The SOIC-8 package provides a compact footprint, ideal for space-constrained designs. The LT1511CS8#TRPBF uses a linear charging topology, which offers simplicity and low noise compared to switching chargers. It includes thermal regulation to prevent overheating, and its input current limiting feature allows operation from limited-power sources such as USB ports. The device is designed for reliable operation over a wide temperature range, making it suitable for demanding environments. Typical applications include portable devices, battery-powered tools, and industrial battery charging systems. The LT1511CS8#TRPBF is particularly well-suited for applications requiring a simple, cost-effective charging solution with high reliability. When designing with this device, ensure proper thermal management by providing adequate PCB copper area for heat dissipation, especially at high charge currents. The input current limiting feature should be configured to match the capabilities of the power source to avoid overloading.
LTC4096EDD#PBF - Dual Input Li-Ion Charger | Analog Devices
The LTC4096EDD#PBF is a standalone linear battery charger from Analog Devices (formerly Linear Technology) designed to charge a single-cell Li-Ion or Li-Polymer battery from both wall adapter and USB inputs. It is housed in a compact 10-lead DFN (3x3 mm) package, making it ideal for space-constrained portable devices. The charger automatically detects power at the inputs and selects the appropriate source, eliminating the need for external sense resistors or blocking diodes due to the internal MOSFET architecture. A battery charger is a power management IC that controls the charging process of rechargeable batteries, ensuring safe and efficient charging. The LTC4096EDD#PBF is a linear charger, meaning it uses a linear regulator to control the charge current, which is simple and low-noise but dissipates more power at higher input voltages. It is part of the broader power management IC hierarchy, specifically within battery management and charging solutions. Key features include a programmable charge current up to 1.2A (as per chipdig.com), a battery charge voltage of 4.2V, and an input voltage range up to 5.5V. The device operates over a temperature range of -40°C to 85°C, ensuring reliability in industrial and consumer environments. The dual-input capability allows simultaneous connection to both wall adapter and USB, with automatic power source selection. The LTC4096EDD#PBF integrates a precision voltage reference and current sensing circuitry, providing accurate charge termination. It includes safety features such as thermal regulation and charge status outputs. The DFN package offers excellent thermal performance, with an exposed pad for heat dissipation. Typical applications include cellular phones, MP3 players, and other portable devices that require charging from both USB and wall adapters. The device's small footprint and low external component count make it suitable for compact designs. When designing with this charger, ensure proper PCB layout with adequate copper area for the exposed pad to manage heat dissipation, especially at high charge currents. Also, consider the input voltage headroom to avoid excessive power dissipation.
LTC4096EDD#TRPBF - Dual Input Li-Ion Charger | Analog Devices
The LTC4096EDD#TRPBF is a standalone linear battery charger IC from Analog Devices (formerly Linear Technology) designed to charge single-cell lithium-ion (Li-Ion) or lithium-polymer (Li-Pol) batteries from two input sources: a wall adapter and a USB port. Housed in a compact 10-lead DFN (3x3 mm) package with an exposed pad, this device integrates power path management, automatically selecting the appropriate input source based on availability. It delivers up to 950mA charge current (programmable via external resistor) and operates from an input voltage range of 4.25V to 5.5V, making it suitable for portable and handheld applications. A battery charger IC is a power management integrated circuit that controls the charging process of rechargeable batteries, ensuring safety and longevity. The LTC4096EDD#TRPBF falls under the category of linear chargers, which use a pass transistor to regulate charge current and voltage. Unlike switching chargers, linear chargers are simpler, smaller, and generate less electromagnetic interference, but they dissipate more heat at higher currents. This device is part of the broader power management IC hierarchy, specifically within battery management and charging solutions. Key features of the LTC4096EDD#TRPBF include dual-input capability with automatic power source selection, a programmable charge current up to 950mA, and a preset charge voltage of 4.2V with ±1% accuracy. It also includes a 10-hour charge termination timer, C/10 charge current detection, and a low-battery charge conditioning mode. The device operates over an industrial temperature range of -40°C to +85°C and is available in tape and reel packaging for automated assembly. Technically, the LTC4096EDD#TRPBF uses an internal MOSFET and no external sense resistor or blocking diode, simplifying the design. It features a constant-current/constant-voltage (CC/CV) charging profile, with the constant-voltage phase set to 4.2V. The charge current is programmed by a single resistor from the PROG pin to ground. The device also provides a status output (CHRG) to indicate charging or charge complete, and a low-battery preconditioning mode for deeply discharged cells. Typical applications include portable electronics such as smartphones, tablets, digital cameras, and handheld medical devices. Its dual-input capability makes it ideal for devices that can be charged from both a wall adapter and a USB port, such as Bluetooth speakers, wearables, and IoT sensors. The small DFN package and minimal external component count make it suitable for space-constrained designs. When designing with this device, ensure proper thermal management by connecting the exposed pad to a large copper area on the PCB. Also, place the input and output capacitors close to the IC to minimize noise and ensure stable operation. The charge current should be set according to the battery capacity and thermal budget to avoid overheating.