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2022-09-24 23:32:00
BQ26231 - Low-Cost Battery Coulomb Counter for Embedded Portable Applications
The bq26231 is a low-cost charge/discharge counter in an 8-pin TSSOP peripheral. It works with an intelligent main controller that provides charging status information for rechargeable Li-ion, Li-polymer, and Ni-MH batteries. "The bq26231 measures a low-value voltage drop across a series sense resistor between the negative terminal of the battery and the ground contact of the battery pack. By using the accumulated counts in the charge, discharge, and self-discharge registers, the smart host controller can determine the battery's state of charge information. In order to For improved accuracy, an offset count register is available. The system host controller is responsible for maintaining the input/output and self-discharge charge registers required by the reset register. The bq26231 features a 13-byte register, which contains capability monitoring and status information. The RBI input operates from an external power storage source, such as a capacitor or a register bank during battery series, to provide a non-volatile battery shorted to ground or the bq26231's state of charge when the battery does not have sufficient operation. In this mode, the register backup current Less than 100 NA. In an 8-pin TSSOP package, the bq26231 is small enough to fit in the gap between two A-cells or in the width of a prismatic cell.