{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24172RGYR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24172RGYR","canonicalUrl":"https://icboms.com/texas-instruments/BQ24172RGYR","factsUrl":"https://icboms.com/api/mcp/products/BQ24172RGYR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ24172RGYR synchronous buck Li-Ion/Polymer battery charger, 1-3 cells, 4A max charge current, 17V supply max, 24-VQFN (5.5x3.5) exposed pad, -40 to 85°C, active.","salesMarkdown":"## 4A synchronous buck charger for 1–3 cell Li-ion packs The Texas Instruments BQ24172RGYR is a synchronous buck battery charger designed for one to three series Lithium Ion or Polymer cells, with a programmable constant-current charge up to 4 A and a maximum input supply of 17 V. The 24-VQFN with exposed pad (5.5x3.5 mm) pulls heat into the board plane, which matters when you're pushing 4 A into a deeply discharged pack and the die is dissipating several watts. On-chip fault protection covers over-current, over-temperature, and over-voltage — the scorch mark you'd otherwise find around a blown sense resistor or a cooked MOSFET gets caught before it happens. ## Charge current programming and cell count flexibility Charge current is constant and programmable via an external sense resistor and the ISET pin — you set the full-scale current with a resistor to ground, no I2C bus required. The 1 to 3 cell range means the battery pack voltage termination point shifts from 4.2 V (single cell) up to 12.6 V (three cells), all handled by the same IC with the appropriate resistor divider on the BAT pin. Operating temperature from -40 to 85°C covers most industrial and automotive cabin environments — outdoor telecom cabinets, portable instrumentation, and battery-backed UPS controllers are typical fits.","metaTitle":"BQ24172RGYR Li-Ion/Polymer Charger IC, 4A Max, 17V Input","metaDescription":"Texas Instruments BQ24172RGYR synchronous buck charger for 1-3 cell Li-Ion/Polymer, 4A max charge current, 17V input, -40 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":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"24-VFQFN Exposed Pad","Product Status":"Active","Number of Cells":"1 ~ 3","lifecycle_stage":"eol_hot","Fault Protection":"Over Current, Over Temperature, Over Voltage","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Base Product Number":"BQ24172","Battery Pack Voltage":"2.1V","Charge Current - Max":"4A","Operating Temperature":"-40°C~85°C(TA)","Programmable Features":"Current","Voltage - Supply (Max)":"17V","Supplier Device Package":"24-VQFN (5.5x3.5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.8600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0430f7feecc292ef9ab6ebeae8cd2668.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the BQ24172RGYR maximum charge current?","answer":"The maximum programmable charge current is 4 A, set by an external sense resistor and the ISET pin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24172RGYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24172RGYR 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}}