• Product introduction

LTC6803-3

LTC6803-1/LTC6803-3 - Multicell battery packmonitor

peculiarity

• Measure up to12The voltage of the series battery
• Stackable architecture
• Supports a wide range of battery chemistries and supercapacitors
• Daisy-style link to the serial interface to adjacent devices
• 0.25%Maximum total measurement error
• Specifically for complianceISO26262Standard systems are designed
• Available in13msComplete measurements of all batteries in one system
• Passive electricitymeasureBalance:
     ― Integrated electricitymeasurebalanceMOSFET
        ― Ability to drive external balancingMOSFET
• On-board temperature sensor and thermistor input
• tooldatapackError testfunctional1MHzSerial interface
• Remains safe if the battery is randomly connected
• Built-in self-test function circuit
• With built-in noise filterΔΣconverter
• Open wire connection fault detection
• 12μAStandby mode supply current
• resistEMIHigh capacity
• 44Pins SSOPencapsulation

• description

  LTC^®The 6803 is a second-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 is capable of measuring voltages from up to 12 series batteries or supercapacitors. Multiple LTC6803-1/LTC6803-3 devices can be connected in series (without optocouplers or optoisolators) using a unique level-shifting serial interface to monitor the voltage of each cell in a long string of series connected cells. Each battery input has an associated MOSFET power switch that discharges overcharged batteries. The LTC6803-1 internally connects the bottom end of the battery pack to V^―Connected. The device is pin compatible with the LTC6802-1, providing a drop-in upgrade. The LTC6803-3 connects the bottom end of the battery pack to V^―Separated, thus improving the measurement accuracy of the first cell (cell 1).

  The LTC6803 provides a standby mode to reduce supply current to 12μA. In addition, the LTC6803 can be powered from an isolated supply, providing a way to reduce the current drawn by the battery pack to zero.

  For applications requiring individually addressable serial communication, refer to the LTC6803-2/LTC6803-4.