LTC6803-2 and -4 - Multicell Battery Stack Monitor

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.

Features
  • 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
  • Onboard 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
Typical Application
LTC6803-2 Typical Application
LTC6803-2 Typical Application
Applications
  • Electric and Hybrid Electric Vehicles
  • High Power Portable Equipment
  • Backup Battery Systems
  • Electric Bicycles, Motorcycles, Scooters
Packaging
LTC6803-2 Package Drawing
LTC6803-2 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6803HG-2#PBFSSOP-44H$15.53$11.14
LTC6803HG-2#TRPBFSSOP-44H$15.59$11.20
LTC6803HG-4#PBFSSOP-44H$15.53$11.14
LTC6803HG-4#TRPBFSSOP-44H$11.20
LTC6803IG-2#PBFSSOP-44I$13.86$9.95
LTC6803IG-2#TRPBFSSOP-44I$10.01
LTC6803IG-4#PBFSSOP-44I$13.86$9.95
LTC6803IG-4#TRPBFSSOP-44I$10.01
Demo Boards
Part NumberDescriptionPrice
DC1652ALTC6803-2 (Requires DC590B) | Demo Board$150.00
DC1835ALTC6803-4 (Requires DC590B) | Demo Board$150.00
DC2064ALTC3300ILXE-1 | LTC6803IG-2 High Frequency Bidirectional Multicell Battery Balancer- Companion Board DC590B$475.00
Companion Boards
Part NumberDescriptionPrice
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
DC590BIsolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards$50.00
Datasheet
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
Ad
Linduino
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LTC6803-2 Linduino Header File
LTC6803-2 Linduino.CPP