Texas Instruments BQ29443 Voltage Protection For Two, Three, or Four-Cell Li-Ion Batteries(4.50V) BQ29443DRBR

The BQ29443DRBR is a voltage protection integrated circuit designed for two, three, or four-cell Li-Ion battery packs, providing second-level overvoltage protection. It features high-accuracy overvoltage detection with thresholds set at 4.50V, along with additional fixed thresholds of 4.30V, 4.35V, and 4.40V. The device operates with a low power consumption of less than 2 ¬µA, making it suitable for applications in notebook computers, power tools, and portable equipment. The BQ29443 incorporates an external capacitor-controlled delay timer, allowing for programmable delay times in response to overvoltage conditions. Upon detection of an overvoltage, the device initiates a timer based on the capacitance connected to the CD pin, and can optionally latch the output high until reset. The product is housed in a compact 8-pin QFN package, facilitating integration into space-constrained designs. Engineers considering this component should note its operational temperature range of -40¬8C to 110¬8C and its suitability for various battery management applications.