High Efficiency Bidirectional Multicell Battery Balancer Features: Bidirectional Synchronous Flyback Balancing of Up to 6 Li-Ion or LiFePO4 Cells in Series Up to 10A Balancing Current (Set by Externals) Integrates Seamlessly with the LTC680x Family of Multicell Battery Stack Monitors Bidirectional Architecture Minimizes Balancing Time and Power Dissipation Up to 92% Charge Transfer Efficiency Stackable Architecture Enables >1000V Systems Uses Simple 2-Winding Transformers 1MHz Daisy-Chainable Serial Interface with 4-Bit CRC Packet Error Checking High Noise Margin Serial Communication Numerous Fault Protection Features 48-Lead Exposed Pad QFN and LQFP Packages AEC-Q100 Qualified for Automotive Applications

Addressable High Efficiency Bidirectional Multicell Battery Balancer Features: Bidirectional Synchronous Flyback Balancing of Up to 6 Li-Ion or LiFePO4 Cells in Series Up to 10A Balancing Current (Set by Externals) Integrates Seamlessly with the LTC680x Family of Multicell Battery Stack Monitors Bidirectional Architecture Minimizes Balancing Time and Power Dissipation Up to 92% Charge Transfer Efficiency Stackable Architecture Enables >800V Systems Uses Simple 2-Winding Transformers 1MHz Serial Interface with 4-Bit CRC Packet Error Checking Individually Addressable with 5-Bit Address Numerous Fault Protection Features 48-Lead Exposed Pad QFN and LQFP Packages AEC-Q100 Qualified for Automotive Application

Lead Acid Battery Balancer Features: Single IC Balances Up to Four 12V Lead-Acid Batteries in Series All NFET Design Stackable to Balance Larger Series Battery Packs Standalone Balancing Operation: Requires No External μP or Additional Control Circuitry Balancing Current Limited by External PTC Thermistor Continuous Mode and Timer Mode Programmable UV and OV Fault Thresholds Programmable Termination Time and Termination Voltage Thermally Enhanced 38-Lead TSSOP Package Click here to read "Life Extension Through Charge Equalization of Lead-Acid Batteries" on IEEE Xplore

Battery Gas Gauge with I2C Interface Features: Indicates Accumulated Battery Charge and Discharge High Accuracy Analog Integration High Side Sense 1% Charge Accuracy ±50mV Sense Voltage Range SMBus/I2C Interface Configurable Alert Output/Charge Complete Input 2.7V to 5.5V Operating Range Quiescent Current Less Than 100µA Small 6-Pin 2mm × 3mm DFN and 8-Lead MSOP Packages

Battery Gas Gauge with I2C Interface Features: Indicates Accumulated Battery Charge and Discharge High Accuracy Analog Integration High Side Sense 1% Charge Accuracy ±50mV Sense Voltage Range SMBus/I2C Interface Configurable Alert Output/Charge Complete Input 2.7V to 5.5V Operating Range Quiescent Current Less Than 100µA Small 6-Pin 2mm × 3mm DFN and 8-Lead MSOP Packages

Battery Gas Gauge with Temperature, Voltage Measurement Features: Indicates Accumulated Battery Charge and Discharge High Accuracy Analog Integration ADC Measures Battery Voltage and Temperature Integrated Temperature Sensor High Side Sense 1% Voltage and Charge Accuracy ±50mV Sense Voltage Range SMBus/I2C Interface Configurable Alert Output/Charge Complete Input 2.7V to 5.5V Operating Range Quiescent Current Less than 100μA Small 6-Pin 2mm × 3mm DFN package

60V Battery Gas Gauge with Temperature, Voltage and Current Measurement Features: Measures Accumulated Battery Charge and Discharge 3.6V to 60V Operating Range for Multiple Cells 14-Bit ADC Measures Voltage, Current and Temperature 1% Voltage, Current and Charge Accuracy ±50mV Sense Voltage Range High Side Sense I2C Interface/SMBus Interface General Purpose Measurements for Any Battery Chemistry and Capacity Configurable Alert Output/Charge Complete Input Quiescent Current Less Than 150μA Small 8-Lead 3mm × 3mm DFN Package

Current, Voltage, and Charge Monitor forHigh Voltage Battery Packs Features: Measures Battery Stack Voltage, Current and Power Indicates Accumulated Battery Charge and Energy 20-Bit Current Measurement with <1μV Offset Built-In Isolated isoSPI™ or SPI Interface LTC68xx/ADBMS68xx Compatible, Supports Synchronous Measurements with Cell Monitors Up to 12 Buffered Voltage Measurement Inputs Up to 5 GPIOs, Configurable to Drive Ground, Supply or Toggling at 400kHz High or Low Side Current Sense 0.3% Current and Voltage Accuracy 1% Energy and Charge Accuracy True Average ADCs I2C EEPROM Interface to Store Board Calibration Factors Threshold Registers for all Measured Quantities Engineered for ISO26262 Compliant Systems Open Wire Detection on Input Pins Available in 48-Lead LQFP Package AEC-Q100 Qualified for Automotive Applications

Ultra-Low Power Battery Gas Gauge Features: Operating Supply Current <1.0μA Supply Voltage from 1.8V to 60V 0V to 60V Sense Voltage for Low-Side or High-Side Sensing Fast 16-bit ADC Measures Voltage, Current and Temperature 1% Voltage, Current and Charge Accuracy No Crystal or other Time Reference Required Programmable Deadband Prevents Charge Drift Includes Battery Voltage Watchdog Includes Precision Temperature Sensor Programmable Alerts and Min/Max Tracking Registers Auxiliary ADC Input for Sensor Readout I2C/SMBus Interface Available in Small 10-Lead 3mm × 2mm DFN Package

L9961