2nd gen HV battery monitor measures from -300-mV to 5-V

2nd gen HV battery monitor measures from -300-mV to 5-V

The LTC6803 is a second-generation high-voltage battery monitor for hybrid/electric vehicles (HEVs), electric vehicles (EVs), and other high-voltage high-performance battery systems. It offers an extended cell measurement range from –300 mV to 5 V, enabling the device to monitor a wide range of battery chemistries, as well as supercapacitors. It is a complete battery-measuring IC that includes a 12-bit ADC, a precision voltage reference, a high-voltage input multiplexer, and a serial interface. Each chip can measure up to 12 individual battery cells in series. Multiple devices can be stacked in series without optocouplers or isolators, permitting precision voltage monitoring of every cell in long strings of series-connected batteries.

The maximum total measurement error of the battery-monitoring device is guaranteed to be less than 0.25% from –40° to 125°C. Each cell is monitored for undervoltage and overvoltage conditions, and an associated MOSFET is available to discharge overcharged cells. Added functionality is provided by an onboard 5-V regulator, temperature sensor, GPIO lines, and thermistor inputs. ($9.95 ea/1,000 — available now.)

Linear Technology , Milpitas , CA
Sales Office 408-428-2050
www.linear.com