{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ29209DRBR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ29209DRBR","canonicalUrl":"https://icboms.com/texas-instruments/BQ29209DRBR","factsUrl":"https://icboms.com/api/mcp/products/BQ29209DRBR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ29209DRBR, Battery Protection IC, 2-Cell Lithium Ion, Over Voltage Fault Protection, Surface Mount 8-VDFN Exposed Pad / 8-SON (3x3), -40°C to 110°C, Tape & Reel.","salesMarkdown":"## 2S Li-Ion overvoltage guard in a 3x3 SON The Texas Instruments BQ29209DRBR is a dedicated battery protection IC for two-series (2S) lithium-ion packs. Its primary job is to monitor each cell for overvoltage conditions and disconnect the pack from charge or discharge when a threshold is exceeded. This is a protection-only part — no fuel-gauging, no SMBus communication, no cell balancing. It sits on the cell-stack PCB, wired directly to the pack terminals, and its output drives the charge/discharge FETs. The operating temperature range of -40°C to 110°C (TA) covers industrial and outdoor enclosures, including engine-bay-adjacent equipment and solar-storage cabinets. The 8-SON (3x3) package keeps the footprint small — useful when the protection PCB shares space with the cell interconnect board. ## Overvoltage protection — what it means for the BOM If the BOM calls for a 2S Li-Ion protection IC, this is the correct device class. ## Lifecycle and sourcing ROHS3 compliant.","metaTitle":"BQ29209DRBR Battery Protection IC, 2-Cell Li-Ion, 8-SON","metaDescription":"TI BQ29209DRBR 2-cell Li-Ion battery protection IC. Overvoltage fault protection, -40°C to 110°C, 8-SON (3x3) package.","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":"8-VDFN Exposed Pad","Number of Cells":"2","lifecycle_stage":"eol_hot","Fault Protection":"Over Voltage","Battery Chemistry":"Lithium Ion","Operating Temperature":"-40°C ~ 110°C (TA)","Supplier Device Package":"8-SON (3x3)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.97","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.97000","currency":"USD"},{"qty":10,"price":"$0.86600","currency":"USD"},{"qty":25,"price":"$0.82200","currency":"USD"},{"qty":100,"price":"$0.67530","currency":"USD"},{"qty":250,"price":"$0.63128","currency":"USD"},{"qty":500,"price":"$0.55788","currency":"USD"},{"qty":1000,"price":"$0.44043","currency":"USD"},{"qty":3000,"price":"$0.41550","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cad5fda7ea308c5134eb9cca7dc29ec9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can the BQ29209DRBR be used for a 2S LiPo pack?","answer":"Yes, the BQ29209DRBR is designed for 2-series (2S) lithium-ion packs. LiPo is a form-factor variant of Li-Ion chemistry, so the protection thresholds are compatible. Verify the overvoltage threshold against your specific cell specification before committing the BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ29209DRBR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ29209DRBR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-13T20:23:36.021Z","lastPublished":"2026-07-13T20:23:36.021Z","indexable":true}}