Bq40370 May 2026

bq40370 is a high-side battery protector intended for use with single-cell and multi-cell lithium-ion and lithium-polymer battery packs. It integrates overcurrent, overvoltage, undervoltage, short-circuit, and thermal protection functions along with MOSFET gate drivers and status reporting. This document provides a detailed technical reference, design guidance, typical applications, electrical characteristics, timing diagrams, protection behavior, PCB layout recommendations, thermal considerations, and example circuits using bq40370.

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To implement the bq40370 into a design, Texas Instruments provides specific hardware and software tools: bq40370 is a high-side battery protector intended for