1. Products
  2. Power Management
  3. Battery Management
  4. Multicell Battery Stack Monitor
  5. LTC6803-2

Data Sheet
JP
User Guides
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Alternative Parts

LTC6804-1
LTC6804-1

12 Channel Multicell Battery Monitor with Daisy Chain Interface, Generation 3

Overview

Features and Benefits

  • Measures Up to 12 Battery Cells in Series
  • Stackable Architecture
  • Supports Multiple Battery Chemistries and Supercapacitors
  • Individually Addressable Serial Interface
  • 0.25% Maximum Total Measurement Error
  • Engineered for ISO26262 Compliant Systems
  • 13ms to Measure All Cells in a System
  • Passive Cell Balancing:
    • Integrated Cell Balancing MOSFETs
    • Ability to Drive External Balancing MOSFETs
  • On-board Temperature Sensor and Thermistor Inputs
  • 1MHz Serial Interface with Packet Error Checking
  • Safe with Random Connection of Cells
  • Built-In Self Tests
  • Delta-Sigma Converter With Built-In Noise Filter
  • Open-Wire Connection Fault Detection
  • 12μA Standby Mode Supply Current
  • High EMI Immunity
  • 44-Lead SSOP Package

Product Details

The LTC6803 is a 2nd generation, complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6803 can measure up to 12 series connected battery cells or supercapacitors. Many LTC6803 devices can be stacked to measure the voltage of each cell in a long battery string. Each LTC6803-2/LTC6803-4 has an individually addressable serial interface, allowing up to 16 LTC6803-2/LTC6803-4 devices to interface to one control processor and operate simultaneously. Each cell input has an associated MOSFET switch for discharging overcharged cells. The LTC6803-2 connects the bottom of the stack to V– internally. It is pin compatible with the LTC6802-2, providing a drop-in upgrade. The LTC6803-4 separates the bottom of the stack from V–, improving cell 1 measurement accuracy.

The LTC6803 provides a standby mode to reduce supply current to 12μA. Furthermore, the LTC6803 can be powered from an isolated supply, providing a technique to reduce battery stack current draw to zero.

The related LTC6803-1 and LTC6803-3 offer a serial interface that allows the serial ports of multiple LTC6803-1 or LTC6803-3 devices to be daisy chained without optocouplers or isolators.

SPI Interface Isolated V– LTC6802 Pin Compatible
LTC6803-1 Daisy Chain No Yes
LTC6803-2 Addressable No Yes
LTC6803-3 Daisy Chain Yes No
LTC6803-4 Addressable Yes No

Applications

  • Electric and Hybrid Electric Vehicles
  • High Power Portable Equipment
  • Backup Battery Systems
  • Electric Bicycles, Motorcycles, Scooters

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Evaluation Kits (3)

Documentation & Resources

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  • Data Sheets (1)
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  • Technical Articles (1)
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    Tools & Simulations

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    Linduino code repository on GitHub and instructions on how to use the code.

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    Linduino

    Code Files

    LTC6803-2 Linduino.CPP
    LTC6803-2 Linduino Header File
    LTC6803-2 - DC1652A.ino

    Product Recommendations

    LTC6803-2 Companion Parts

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    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LTC6803HG-2#3ZZPBF Material Declaration Reliability Data 44-Lead SSOP
    LTC6803HG-2#3ZZTRPBF Material Declaration Reliability Data 44-Lead SSOP
    LTC6803HG-2#PBF Material Declaration Reliability Data 44-Lead SSOP
    LTC6803HG-2#TRPBF Material Declaration Reliability Data 44-Lead SSOP
    LTC6803IG-2#3ZZPBF Material Declaration Reliability Data 44-Lead SSOP
    LTC6803IG-2#3ZZTRPBF Material Declaration Reliability Data 44-Lead SSOP
    LTC6803IG-2#PBF Material Declaration Reliability Data 44-Lead SSOP
    LTC6803IG-2#TRPBF Material Declaration Reliability Data 44-Lead SSOP
    Wafer Fabrication Data R525 Reliability Data

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    • LTC6803HG-2#3ZZPBF Production
    • LTC6803HG-2#3ZZTRPBF Production
    • LTC6803HG-2#PBF Production
    • LTC6803HG-2#TRPBF Production
    • LTC6803IG-2#3ZZPBF Production
    • LTC6803IG-2#3ZZTRPBF Production
    • LTC6803IG-2#PBF Production
    • LTC6803IG-2#TRPBF Production

    Support & Discussions

    LTC6803-2 Discussions

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