LTC6802IG-2#PBF

LTC6802-2 is a complete battery monitoring IC that includes a 12bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each device can measure 12 series connected battery cells, with a total input voltage upto 60V. The voltage on all 12 input channels can be measured within 13ms. Each device has an individually addressable serial interface, allowing upto 16 LTC6802-2 devices to interface to one control processor and operate simultaneously. To minimize power, it offers a measure mode to monitor each cell for overvoltage and undervoltage conditions. A standby mode is also provided to reduce supply current to 50µA. Each cell input has an associated MOSFET switch that can discharge any overcharged cell. It is used in applications such as electric and hybrid electric vehicles, high power portable equipment, backup battery systems, high voltage data acquisition systems etc.

• Stackable architecture enables monitoring high voltage battery stacks
• Individually addressable with 4bit address
• Total measurement error is 0.8mV typ at (VCELL = 0V,TA = 25°C, V+ = 43.2V)
• Measurement cycle time is 13ms typ at (TA = 25°C, V+ = 43.2V)
• On-chip passive cell balancing switches, provision for off-chip passive balancing
• Two thermistor inputs plus onboard temperature sensor
• 1MHz serial interface with packet error checking
• High EMI immunity, delta-sigma converter with built-in noise filter
• Open-wire connection fault detection, low power modes
• Operating temperature is -40°C to 85°C, package style is 44-lead plastic SSOP

Note

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