The LTC®6803 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.
APPLICATIONS
Electric and Hybrid Electric Vehicles
High Power Portable Equipment
Backup Battery Systems
Electric Bicycles, Motorcycles, Scooters
Feature
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
