{"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 Rated for -40°C to 85°C ambient, the BQ29729DSET covers the industrial temperature band. 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. ## Lifecycle and compliance The BQ29729DSET carries an Active product status and is ROHS3 compliant. The ROHS3 compliance covers the full substance restriction set, which simplifies export compliance for finished goods shipped into EU or California-regulated markets. ## Sourcing posture For a BOM line that needs a single-cell protector with no end-of-life risk, the BQ29729DSET is a straightforward call — no second-source gymnastics required when the TI catalog lists it as active.","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","stockQuantity":0,"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},"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":"2026-07-13T20:47:59.137Z","lastPublished":"2026-07-13T20:47:59.137Z","indexable":true}}