{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ29209DRBT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ29209DRBT","canonicalUrl":"https://icboms.com/texas-instruments/BQ29209DRBT","factsUrl":"https://icboms.com/api/mcp/products/BQ29209DRBT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ29209DRBT, Battery Protection IC, 2-Cell Li-Ion, Over-Voltage Protection, Surface Mount 8-VDFN Exposed Pad (8-SON 3x3), -40°C to 110°C.","salesMarkdown":"## 2S Li-Ion over-voltage watchdog The Texas Instruments BQ29209DRBT is a dedicated battery protection IC for two-cell (2S) Lithium-Ion packs, providing over-voltage fault protection. It monitors each cell independently and triggers a protective action when any cell exceeds its over-voltage threshold. This is a single-function protector — it does not handle over-current, short-circuit, or temperature faults, so the BOM needs additional protection layers for a fully safeguarded pack. ## Package and mounting Housed in an 8-SON (3x3 mm) package with an exposed pad, this is a bottom-pad QFN-style part. The exposed pad under the IC is the main thermal path and also the ground connection. ## Temperature range and deployment fit Rated from -40°C to 110°C ambient, this part handles industrial battery packs, outdoor telecom backup, and power-tool applications. It stops short of automotive under-hood environments (125°C), so if the design targets a passenger-cabin BMS or an engine-bay pack, look at the AEC-Q100 graded BQ79612PAPRQ1 instead.","metaTitle":"BQ29209DRBT Battery Protection IC, 2-Cell Li-Ion, 8-SON","metaDescription":"TI BQ29209DRBT battery protection IC for 2-cell Li-Ion packs. Over-voltage 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":"$1.16","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.16000","currency":"USD"},{"qty":10,"price":"$1.03800","currency":"USD"},{"qty":25,"price":"$0.98520","currency":"USD"},{"qty":100,"price":"$0.80940","currency":"USD"},{"qty":250,"price":"$0.75664","currency":"USD"},{"qty":500,"price":"$0.66864","currency":"USD"},{"qty":1250,"price":"$0.52788","currency":"USD"},{"qty":2500,"price":"$0.49800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cad5fda7ea308c5134eb9cca7dc29ec9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BQ29209DRBT compatible with 2S lithium batteries?","answer":"Yes, the BQ29209DRBT is designed for two-cell (2S) Lithium-Ion packs and provides over-voltage protection per cell."},{"question":"What is the difference between BQ29209 and BQ29209DRBT?","answer":"The BQ29209DRBT is the Tape & Reel (TR) and Cut Tape (CT) ordering option of the base BQ29209 device. The silicon and function are identical; the suffix indicates the shipping package format."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ29209DRBT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ29209DRBT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-13T19:39:33.098Z","lastPublished":"2026-07-13T19:39:33.098Z","indexable":true}}