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LTC6802IG-1#PBF

製品説明
仕様・特性

LTC6802-1 Multicell Battery Stack Monitor FEATURES DESCRIPTION n The LTC®6802-1 is a complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6802-1 can measure up to 12 series connected battery cells with an input common mode voltage up to 60V. In addition, multiple LTC6802-1 devices can be placed in series to monitor the voltage of each cell in a long battery string. The unique level-shifting serial interface allows the serial ports of these devices to be daisy-chained without optocouplers or isolators. n n n n n n n n n n n Measures up to 12 Li-Ion Cells in Series (60V Max) Stackable Architecture Enables >1000V Systems 0.25% Maximum Total Measurement Error 13ms to Measure All Cells in a System Cell Balancing: On-Chip Passive Cell Balancing Switches Provision for Off-Chip Passive Balancing Two Thermistor Inputs Plus On-Board Temperature Sensor 1MHz Daisy-Chainable Serial Interface High EMI Immunity Delta Sigma Converter with Built-In Noise Filter Open Wire Connection Fault Detection Low Power Modes 44-Lead SSOP Package APPLICATIONS n n n n When multiple LTC6802-1 devices are connected in series they can operate simultaneously, permitting all cell voltages in the stack to be measured within 13ms. To minimize power, the LTC6802-1 offers a measure mode, which simply monitors each cell for overvoltage and undervoltage conditions. A standby mode is also provided. Each cell input has an associated MOSFET switch for discharging overcharged cells. Electric and Hybrid Electric Vehicles High Power Portable Equipment Backup Battery Systems High Voltage Data Acquisition Systems For large battery stack applications requiring individually addressable serial communications, see the LTC6802-2. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION NEXT 12-CELL PACK ABOVE Measurement Error Over Extended Temperature LTC6802-1 SERIAL DATA TO LTC6802-1 ABOVE DIE TEMP + V 0.30 0.25 12-CELL BATTERY STRING MEASUREMENT ERROR (%) REGISTERS AND CONTROL MUX 12-BIT Δ∑ ADC 7 REPRESENTATIVE UNITS 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0.20 V– NEXT 12-CELL PACK BELOW EXTERNAL TEMP –0.25 VOLTAGE REFERENCE SERIAL DATA TO LTC6802-1 BELOW 68021 TA01a –0.30 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 125 68021 TA01b 100k 100k NTC 68021fa 1

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