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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fbq79631-q1″>View Datasheet
Texas Instruments bq79631-Q1 Battery Monitor and Balancer provides high-accuracy measurement capable of measuring divided down voltages from high voltage nodes. These voltage nodes include Pack+ (HV Battery Positive terminal), Fuse, Charge (Port), Link (Load) in a battery junction box (BJB), or battery disconnect unit (BDU) system. Key voltage measurements can make use of the integrated digital low-pass filters. The device has a highly accurate integrated current sense ADC capable of measuring current in a low-side shunt resistor. The device can measure the insulation resistance with internal ADC and control any switching scheme needed for this measurement. Eight GPIOs/auxiliary inputs can be used for thermistor measurement, driving relays, measuring voltages, and being a master SPI interface to peripheral SPI devices. The isolated bi-directional daisy-chain ports support both capacitor or transformer-based isolation. The device also supports communication over UART.
Host communication to the Texas Instruments bq79631-Q1 can be connected via the device’s dedicated UART interface or through a communication bridge device, bq79600-Q1. Additionally, an isolated, differential daisy-chain communication interface allows the host to communicate with the other UIR monitors and even cell monitors over a single interface. In the event of a communication line break, the daisy-chain communication interface is configurable to a ring architecture that allows the host to talk to devices at either end of the stack.
