LTC6802-2 multicell addressable battery packmonitor
peculiarity
- Voltage measurement of up to 12 series Li-Ion batteries (60V maximum)
- The stackable architecture enables monitoring of high-voltage battery packs
- 4-bit addresses can be used for individual addressing
- 0.25% maximum total measurement error
- Measurements of all batteries in a system can be completed in 13ms
- Power balance:
Built-in passive balance switch
Provides off-chip passive power balancing - Two thermistor inputs and built-in temperature sensor
- 1MHz serial interface with packet error checking
- High EMI resistance
- ΔΣ converter with built-in noise filter
- Open wire connection fault detection
- Low power mode
- 44-pin SSOP package
description
LTC®The 6802-2 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 LTC6802-2 is capable of measuring the voltage of 12 cells connected in series with a total input voltage of up to 60V. Voltage measurements on all 12 input channels can be completed in 13ms.
Multiple LTC6802-2 devices can be connected in series to monitor the voltage of each cell in a long string of series connected cells. Each LTC6802-2 has an individually addressable serial interface, allowing up to 16 LTC6802-2 devices to be connected to a control processor and operate simultaneously.
To minimize power, the LTC6802-2 provides a measurement mode designed to monitor each cell for overvoltage and undervoltage conditions. A standby mode is also provided to reduce supply current to 50μA.
Each battery input has an associated MOSFET switch that discharges any overcharged batteries.
Related Devices The LTC6802-1 provides a serial interface that enables daisy-chaining of serial ports of multiple LTC6802-1 devices without the need for optocouplers or optoisolators.
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- Electric and hybrid vehicles
- High-power portable devices
- Backup battery system
- High voltage data acquisition system