{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ4050RSMR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ4050RSMR","canonicalUrl":"https://icboms.com/texas-instruments/BQ4050RSMR","factsUrl":"https://icboms.com/api/mcp/products/BQ4050RSMR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ4050RSMR multi-function Li-Ion battery controller, 1-4 cells, SMBus interface, 32-VFQFN exposed pad package, -40°C to 85°C.","salesMarkdown":"## Battery pack gauge and protection in one IC The BQ4050RSMR is a multi-function controller for 1-4 series Li-Ion or Li-Polymer battery packs, integrating fuel gauging, cell balancing, and protection into a single 32-VFQFN package. It communicates over SMBus, so the host system reads state-of-charge, voltage, and temperature data without additional analog front-end circuitry. ## Protection coverage and temperature range Fault protection includes overcurrent, overtemperature, over/under voltage, and short circuit — covering the main failure modes a multi-cell pack sees in charge/discharge cycles. ROHS3 compliant, with no restricted substances above the threshold limits per EU directive 2015/863.","metaTitle":"BQ4050RSMR Multi-Function Li-Ion Battery Controller","metaDescription":"Texas Instruments BQ4050RSMR multi-function Li-Ion battery controller for 1-4 cells. Active production, ROHS3 compliant. SMBus interface, fault protection.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Multi-Function Controller","Interface":"SMBus","Mounting Type":"Surface Mount","Package / Case":"32-VFQFN Exposed Pad","Number of Cells":"1 ~ 4","lifecycle_stage":"eol_hot","Fault Protection":"Over Current, Over Temperature, Over/Under Voltage, Short Circuit","Battery Chemistry":"Lithium Ion/Polymer","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"32-VQFN (4x4)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.18","priceTiers":[{"qty":1,"price":"$6.18000","currency":"USD"},{"qty":10,"price":"$5.55000","currency":"USD"},{"qty":25,"price":"$5.24720","currency":"USD"},{"qty":100,"price":"$4.54740","currency":"USD"},{"qty":250,"price":"$4.31420","currency":"USD"},{"qty":500,"price":"$3.87112","currency":"USD"},{"qty":1000,"price":"$3.30000","currency":"USD"},{"qty":3000,"price":"$3.30000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7a53f7c76f404d164b14d374aa2b28fd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ4050RSMR/alternatives.json"},"ai":{"faq":[{"question":"What is BQ4050RSMR's listed function?","answer":"It is a multi-function controller for Li-Ion/Li-Polymer battery packs, handling fuel gauging, cell balancing, and fault protection in a single IC. It communicates over SMBus to the host system."},{"question":"Will BQ4050RSMR drop into a board designed for BQ296217DSGT?","answer":"No — the BQ296217DSGT is a battery protection IC only (over-voltage protection for 2-4 cells), not a multi-function controller. The BQ4050RSMR adds fuel gauging and SMBus communication, so the board layout, firmware, and host interface differ. They are not pin-compatible replacements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ4050RSMR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ4050RSMR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}