{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ27545YZFR-G1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ27545YZFR-G1","canonicalUrl":"https://icboms.com/texas-instruments/BQ27545YZFR-G1","factsUrl":"https://icboms.com/api/mcp/products/BQ27545YZFR-G1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ27545YZFR-G1, Impedance Track™ series, Battery Monitor, single-cell Li-Ion, HDQ and I²C interface, 15-DSBGA package, -40°C to 85°C operating temperature, active lifecycle.","salesMarkdown":"## Single-cell Li-Ion fuel gauge with Impedance Track™ The Texas Instruments BQ27545YZFR-G1 is a single-cell Lithium Ion battery monitor that uses the Impedance Track™ algorithm to report state-of-charge, state-of-health, and remaining capacity. It communicates over HDQ or I²C to a host controller, and the algorithm self-learns battery impedance over aging cycles — so the reported charge stays accurate without periodic full-discharge recalibrations. ## Industrial temperature range — outdoor and portable gear The DSBGA-15 package (15-UFBGA) keeps the footprint small — about 2.5 mm per side — which matters when the gauge sits directly on the battery cell tab in a tight assembly. ## Active production — no LTB watch needed That means standard lead times through the franchised channel, no premium for broker stock, and no pressure to last-time-buy. For a BOM line that runs for years in a field-replaceable battery pack, this is the right lifecycle posture. ## Interface options and pack topology The part supports both HDQ (single-wire) and I²C (two-wire) host interfaces — the firmware team picks the bus that matches the MCU peripheral map. It monitors exactly one series cell; a 2S pack requires a different gauge or a stacked configuration. The base product number BQ27545 covers the family; the -G1 suffix indicates the specific firmware variant and DSBGA-15 package.","metaTitle":"BQ27545YZFR-G1 Battery Monitor, Impedance Track™","metaDescription":"Texas Instruments BQ27545YZFR-G1 single-cell Li-Ion battery monitor with Impedance Track™ algorithm. HDQ/I²C interface, -40°C to 85°C, active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"Impedance Track™","Package":"Tape & Reel (TR)","Function":"Battery Monitor","Interface":"HDQ, I²C","Mounting Type":"Surface Mount","Package / Case":"15-UFBGA, DSBGA","Product Status":"Active","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"-","Battery Chemistry":"Lithium Ion","Base Product Number":"BQ27545","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"15-DSBGA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.9840","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f25c3dea8e40ee4de9fa55a8dc9455da.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BQ27545YZFR-G1 compatible with 2S battery packs?","answer":"No — this monitor is designed for a single series cell (1S). A 2S pack requires a gauge that handles two cells in series, such as the BQ27546 family or a different TI gauge with stacked cell support."},{"question":"What is the I²C address of BQ27545YZFR-G1?","answer":"The default I²C address is set in the device firmware and is listed in the datasheet. The part also supports HDQ (single-wire) interface as an alternative bus option."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ27545YZFR-G1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ27545YZFR-G1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}