{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ29737DSET","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ29737DSET","canonicalUrl":"https://icboms.com/texas-instruments/BQ29737DSET","factsUrl":"https://icboms.com/api/mcp/products/BQ29737DSET","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ29737DSET, Battery Protection IC, 1-Cell Lithium Ion/Polymer, Over Current, Over/Under Voltage, Short Circuit Protection, -40°C to 85°C, Surface Mount, 6-WFDFN / 6-WSON (1.5x1.5 mm), Tape & Reel.","salesMarkdown":"## Single-cell Li-Ion protector in a 1.5 mm square package The Texas Instruments BQ29737DSET is a single-cell lithium-ion/polymer battery protection IC built for portable and industrial packs. It monitors one series cell and triggers protection on over-current, over-voltage, under-voltage, and short-circuit conditions — the four fault modes a 1S Li-Ion pack needs to survive charging and discharging without venting or degrading. The part comes in a 6-WFDFN package measuring 1.5 x 1.5 mm, which is small enough to fit inside a battery-pack flex or a handheld-device PCB. The operating temperature range of -40°C to 85°C covers industrial enclosures, outdoor portable gear, and consumer electronics — but not automotive under-hood, where the BQ79612PAPRQ1's 125°C rating would be needed. ## Protection logic and BOM fit The fault protection block handles the four events a 1-cell Li-Ion protection IC must manage: over-current during discharge, over-voltage during charge (cell overcharge), under-voltage (deep discharge cutoff), and short-circuit. There is no integrated fuel gauge, no SMBus communication, and no cell balancing — this is a pure protection switch controller, not a monitor. The BOM decision is straightforward: if the design needs only a hardware protection fence around the cell, this IC fits; if it also needs state-of-charge reporting or multi-cell balancing, look at the BQ2084 series (2–4 cells, SMBus) instead. Surface-mount assembly in the 6-WFDFN footprint keeps the placement compatible with standard reflow profiles. The Tape & Reel supply is the typical channel for volume production; Cut Tape (CT) is available for prototype or low-volume builds. No separate heat sink is needed — the package relies on the PCB copper for thermal dissipation at the protection FET's dissipation level. ## Lifecycle and sourcing posture The BQ29737DSET carries an active lifecycle status, meaning Texas Instruments continues to manufacture it with no announced last-time-buy or end-of-life notice. Channel supply is normal — no allocation risk flagged. For dual-sourcing or a higher-temperature variant, the BQ79612PAPRQ1 (AEC-Q100, -40°C to 125°C) is a functional alternative but not a pin-for-pin drop-in; it adds SPI/UART communication and over-temperature protection, which changes the BOM interface requirements. Because this is an active, single-sourced TI part, the procurement risk is low as long as the BOM stays within TI's standard distribution. No minimum order quantity beyond the reel increment applies for standard orders.","metaTitle":"TI BQ29737DSET Battery Protection IC, 1-Cell Li-Ion, 6-WSON","metaDescription":"Texas Instruments BQ29737DSET single-cell Li-Ion battery protection IC. Over-current, over/under-voltage, short-circuit protection. 6-WSON (1.5x1.5 mm) package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"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":"$1.2","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.20000","currency":"USD"},{"qty":10,"price":"$1.07600","currency":"USD"},{"qty":25,"price":"$1.02080","currency":"USD"},{"qty":100,"price":"$0.83860","currency":"USD"},{"qty":250,"price":"$0.78392","currency":"USD"},{"qty":500,"price":"$0.69276","currency":"USD"},{"qty":1250,"price":"$0.54691","currency":"USD"},{"qty":2500,"price":"$0.51046","currency":"USD"},{"qty":6250,"price":"$0.48493","currency":"USD"},{"qty":12500,"price":"$0.46670","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/675a74142e5b0eed774656b6d9cdd1c0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the BQ29737DSET used for?","answer":"It is a single-cell lithium-ion/polymer battery protection IC. Typical applications include portable electronics, power tools, medical devices, and industrial equipment that use a 1S Li-Ion pack."},{"question":"Is the BQ29737DSET compatible with 1-cell Li-Ion?","answer":"Yes, the number of cells is explicitly 1, and the battery chemistry is Lithium Ion/Polymer. It is designed for exactly that configuration."},{"question":"What is a direct cross reference for the BQ29737DSET?","answer":"There is no official direct cross reference or second-source alternate listed. The BQ79612PAPRQ1 is a functional alternative with a wider temperature range (-40°C to 125°C) and additional features (SPI/UART, over-temperature protection), but it is not a pin-compatible drop-in. Evaluate the BOM interface requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ29737DSET","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ29737DSET when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-13T23:42:25.939Z","lastPublished":"2026-07-13T23:42:25.939Z","indexable":true}}