ADI LTC6813－1多颗电池监测解决方案

ADI公司的LTC6813-1是可测量到多达18颗串接电池连接的监视器,总测量误差小于2.2mV,电池测量范围0-5V,所有18颗电池测量时间在290μs,内置isoSPI™接口,主要用在电动和混合动力汽车以及备份电池系统.本文介绍了LTC6813-1主要特性,框图和多种应用电路,以及演示板DC2350A主要性能和电路图.
The LTCR6813-1 is a multicell battery stack monitor thatmeasures up to 18 series connected battery cells witha total measurement error of less than 2.2mV. The cell measurement range of 0V to 5V makes the LTC6813-1suitable for most battery chemistries. All 18 cells can bemeasured in 290μs, and lower data acquisition rates canbe selected for high noise reduction.
Multiple LTC6813-1 devices can be connected in series,permitting simultaneous cell monitoring of long, highvoltage battery strings. Each LTC6813-1 has an isoSPIinterface for high speed, RF immune, long distance communications.Multiple devices are connected in a daisychain with one host processor connection for all devices.
This daisy chain can be operated bidirectionally, ensuringcommunication integrity, even in the event of a fault alongthe communication path.
The LTC6813-1 can be powered directly from the batterystack or from an isolated supply. The LTC6813-1 includespassive balancing for each cell, with individual PWM dutycycle control for each cell. Other features include an onboard5V regulator, nine general purpose I/O lines and asleep mode, where current consumption is reduced to 6μA.
LTC6813-1主要特性:
nnMeasures Up to 18 Battery Cells in Series
nn2.2mV Maximum Total Measurement Error
nnStackable Architecture Supports 100s of Cells
nnBuilt-In isoSPI™ Interface
nn1Mb Isolated Serial Communications
nnUses a Single Twisted Pair, Up to 100 Meters
nnLow EMI Susceptibility and Emissions
nnBidirectional for Broken Wire Protection
nn290μs to Measure All Cells in a System
nnSynchronized Voltage and Current Measurement
nn16-Bit Delta-Sigma ADC with Programmable3rd Order Noise...