{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ29729DSET","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ29729DSET","canonicalUrl":"https://icboms.com/texas-instruments/BQ29729DSET","factsUrl":"https://icboms.com/api/mcp/products/BQ29729DSET","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ29729DSET, Battery Protection IC, 1-Cell, Lithium Ion/Polymer, Fault Protection: Over Current, Over/Under Voltage, Short Circuit, 6-WFDFN, -40°C to 85°C.","salesMarkdown":"## What the protection set covers The fault detection block handles overcurrent during charge and discharge, overvoltage (over-charge), undervoltage (over-discharge), and short-circuit events. That covers the three standard failure modes a single-cell Li-Ion pack needs: cell over-charge, cell over-discharge, and load-side short. There is no integrated FET stage — this is a controller that drives external N-channel MOSFETs, so you size the pass elements for the continuous discharge current your application demands. ## Temperature grade and operating range That puts it in scope for outdoor telecom battery packs, portable instrumentation, and consumer electronics that might see a hot car interior or cold storage. The 6-WSON package with 1.5 mm x 1.5 mm footprint keeps the BOM area small — useful when the protection circuit has to fit inside the battery housing alongside the cell tabs. ## Sourcing posture","metaTitle":"BQ29729DSET Battery Protection IC, 1-Cell Li-Ion/Polymer","metaDescription":"TI BQ29729DSET single-cell Li-Ion/Polymer battery protection IC with overcurrent, over/under voltage, and short-circuit fault protection.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Battery Protection","Mounting Type":"Surface Mount","Package / Case":"6-WFDFN","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Current, Over/Under Voltage, Short Circuit","Battery Chemistry":"Lithium Ion/Polymer","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"6-WSON (1.5x1.5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.25","priceTiers":[{"qty":1,"price":"$1.25000","currency":"USD"},{"qty":10,"price":"$1.11900","currency":"USD"},{"qty":25,"price":"$1.06240","currency":"USD"},{"qty":100,"price":"$0.87280","currency":"USD"},{"qty":250,"price":"$0.81588","currency":"USD"},{"qty":500,"price":"$0.72102","currency":"USD"},{"qty":1250,"price":"$0.56922","currency":"USD"},{"qty":2500,"price":"$0.53700","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b222c915dfe6db86cde422f696c81d8f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ29729DSET/alternatives.json"},"ai":{"faq":[{"question":"Is BQ29729DSET RoHS compliant?","answer":"Yes, the BQ29729DSET is ROHS3 compliant, covering the full EU RoHS substance restriction set including the four phthalates added in RoHS3."},{"question":"Does BQ29729DSET support 2-cell batteries?","answer":"No, the BQ29729DSET is a single-cell (1-cell) protection IC. For 2-cell to 4-cell packs, look at a multi-cell monitor like the BQ2084DBT-V143, which uses an SMBus interface and targets 2-to-4 series Li-Ion/Polymer stacks."},{"question":"What is the BQ29729DSET used for?","answer":"It monitors for overcurrent, over/under voltage, and short-circuit faults and drives external N-channel MOSFETs to disconnect the cell when thresholds are exceeded. Typical use is in portable device battery packs, power banks, handheld tools, and medical equipment where a hardware safety watch is required independent of the system firmware."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ29729DSET","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ29729DSET 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}}