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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fbq79656-q1″>View Datasheet
Texas Instruments bq7965x-Q1 Battery Monitor, Balancer & Hardware Protector provides high-accuracy cell voltage measurements for a minimum of 6S to a maximum of 16S battery modules in less than 200µs. The bq79652-Q1 (12S), bq79654-Q1 (14S), or bq79656-Q1 (16S) also supports shunt-resistor current sense measurement. The integrated front-end filters enable the system to implement simple, low voltage raring, differential RC filters on the cell input channels. The integrated, post-ADC, low-pass filters enable filtered DC-like voltage measurements. The bq7965x-Q1 also supports integrated current sensing capabilities with the option to synchronize with cell voltage measurements for a better state of charge (SOC) calculation. The device supports autonomous internal cell balancing with temperature monitoring to auto-pause and resumes balancing to avoid an overtemperature condition.
The inclusion of the isolated, bidirectional, daisy chain ports supports both capacitor- and transformer-based isolation, allowing the use of the most effective components for centralized or distributed architectures commonly found in the xEV powertrain system. The bq7965x-Q1 also includes eight GPIOs or auxiliary inputs that can be used for external thermistor measurements.
Host communication to the Texas Instruments bq7965x-Q1 family of devices can be connected via the device’s dedicated UART interface or through a communication bridge device, bq79600. Additionally, an isolated differential daisy-chain communication interface allows the host to communicate with the entire battery stack 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.
