Multi Cell Battery Stack Monitor 18 Channel Addressable IsoSPI Interface

LTC6813HLWE-1#3ZZPBF Battery Management 18 Channel Multicell Battery Stack Monitor with Addressable isoSPI Interface

FEATURES DESCRIPTION Multicell Battery Monitor The LTC®6813-1 is a multicell battery stack monitor that measures up to 18 series connected battery cells with a total measurement error of less than 2.2mV. The cell measurement range of 0V to 5V makes the LTC6813-1 suitable for most battery chemistries. All 18 cells can be measured in 290µs, and lower data acquisition rates can be selected for high noise reduction. Multiple LTC6813-1 devices can be connected in series, permitting simultaneous cell monitoring of long, high voltage battery strings. Each LTC6813-1 has an isoSPI interface for high speed, RF immune, long distance communications. Multiple devices are connected in a daisy chain with one host processor connection for all devices. This daisy chain can be operated bidirectionally, ensuring communication integrity, even in the event of a fault along the communication path. The LTC6813-1 can be powered directly from the battery stack or from an isolated supply. The LTC6813-1 includes passive balancing for each cell, with individual PWM duty cycle control for each cell. Other features include an onboard 5V regulator, nine general purpose I/O lines and a sleep mode, where current consumption is reduced to 6µA. Cell 18 Measurement Error vs Temperature APPLICATIONS n Measures Up to 18 Battery Cells in Series n 2.2mV Maximum Total Measurement Error n Stackable Architecture Supports 100s of Cells n Built-In isoSPI™ Interface n 1Mb Isolated Serial Communications n Uses a Single Twisted Pair, Up to 100 Meters n Low EMI Susceptibility and Emissions n Bidirectional for Broken Wire Protection n 290µs to Measure All Cells in a System n Synchronized Voltage and Current Measurement n 16-Bit Delta-Sigma ADC with Programmable 3rd Order Noise Filter n Engineered for ISO 26262-Compliant Systems n Passive Cell Balancing Up to 200mA (Max) with Programmable Pulse-Width Modulation n 9 General Purpose Digital I/O or Analog Inputs n Temperature or Other Sensor Inputs n Configurable as an I2C or SPI Master n 6µA Sleep Mode Supply Current n 64-Lead eLQFP Package n Electric and Hybrid Electric Vehicles n Backup Battery Systems n Grid Energy Storage n High Power Portable Equipment All registered trademarks and trademarks are the property of their respective owners.