LTC6803HG-4#3ZZTRPBF LTC6803IG-3#3ZZTRPBF LTC6803IG-4#3ZZTRPBF Power Path Management IC Battery Management Multicell Bat

FEATURES

n Measures Up to 12 Battery Cells in Series n Stackable Architecture
n Supports Multiple Battery Chemistries and Supercapacitors
n Individually Addressable Serial Interface
n 0.25% Maximum Total Measurement Error
n Engineered for ISO26262 Compliant Systems

n 13ms to Measure All Cells in a System
n Passive Cell Balancing:

– Integrated Cell Balancing MOSFETs

– Ability to Drive External Balancing MOSFETs
n Onboard Temperature Sensor and Thermistor Inputs

n 1MHz Serial Interface with Packet Error Checking
n Safe with Random Connection of Cells
n Built-In Self Tests
n Delta-Sigma Converter With Built-In Noise Filter
n Open-Wire Connection Fault Detection
n 12μA Standby Mode Supply Current
n High EMI Immunity
n 44-Lead SSOP Package

APPLICATIONS

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

DESCRIPTION

The LTC®6803 is a 2nd generation, complete battery moni- toring 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 in- terface that allows the serial ports of multiple LTC6803-1 or LTC6803-3 devices to be daisy chained without opto- couplers or isolators.