Texas Instruments BQ2013H NiCd/NiMH/Lead-Acid Gas Gauge For High Discharge Rates (>10A), Pgmable Offset Error & Load Comp. BQ2013HSN-A514TR

The BQ2013H is a gas gauge integrated circuit designed for monitoring the available charge in rechargeable batteries, specifically for high discharge rate applications exceeding 10A. It supports NiCd, NiMH, and lead-acid battery chemistries, making it versatile for various battery pack integrations. The device features a low standby current of 120µA in self-discharge estimation mode and can be implemented in compact PCB designs, requiring as little as 1/2 square inch of space. This IC utilizes a sense resistor to monitor voltage drops, allowing it to accurately track charge and discharge activities. It compensates for temperature variations and self-discharge rates, providing reliable capacity information across diverse operating conditions. The BQ2013H includes programmable pins for setting initial battery capacity, self-discharge rates, and charge compensation, and it can directly drive LEDs for capacity display. Communication with external processors is facilitated through a simple single-wire serial interface, enabling easy integration into larger systems. The device operates from four nickel cells or three lead-acid cells, with options for additional voltage regulation. The BQ2013H is suitable for applications such as electric assist bicycles and other high-capacity battery systems.