{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ25121AYFPR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ25121AYFPR","canonicalUrl":"https://icboms.com/texas-instruments/BQ25121AYFPR","factsUrl":"https://icboms.com/api/mcp/products/BQ25121AYFPR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ25121AYFPR single-cell linear battery charger IC, multi-chemistry, I²C programmable charge current/timer/voltage, 300 mA max charge current, 4.65 V battery pack voltage, over-current/over-voltage/short-circuit protection, -40°C to 85°C, 25-DSBGA package, Tape & Reel.","salesMarkdown":"## Single-cell linear charger with I²C programmability The Texas Instruments BQ25121AYFPR is a single-cell linear battery charger IC designed for multi-chemistry cells. It delivers a constant charge current up to 300 mA and regulates the battery pack voltage to 4.65 V. The charge parameters — current, timer, and voltage — are programmable via the I²C interface, giving the designer control over the charge profile without external resistor networks. ## Built-in fault protection reduces external BOM Over-current, over-voltage, and short-circuit protection are integrated on-chip, eliminating the need for discrete protection components on the charge path. This simplifies the PCB layout and shrinks the solution footprint for space-constrained designs like wearables or IoT modules.","metaTitle":"BQ25121AYFPR single-cell linear charger IC, 300mA, I²C","metaDescription":"Texas Instruments BQ25121AYFPR single-cell linear charger IC, 300 mA max charge current, I²C programmable, 4.65 V battery pack voltage","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)","Interface":"I²C","Mounting Type":"Surface Mount","Package / Case":"25-XFBGA, DSBGA","Product Status":"Active","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Current, Over Voltage, Short Circuit","Battery Chemistry":"Multi-Chemistry","Current - Charging":"Constant","Base Product Number":"BQ25121","Battery Pack Voltage":"4.65V","Charge Current - Max":"300mA","Operating Temperature":"-40°C~85°C","Programmable Features":"Current, Timer, Voltage","Voltage - Supply (Max)":"5.5V","Supplier Device Package":"25-DSBGA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.2050","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/cc88fcc8f743ef995018da87357b3a9d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BQ25121AYFPR compatible with LiPo batteries?","answer":"Yes — the charger supports multi-chemistry cells. With a battery pack voltage of 4.65 V and a programmable charge voltage via I²C, it can be configured for single-cell LiPo or Li-ion batteries that terminate at 4.2 V or 4.35 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ25121AYFPR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ25121AYFPR 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}}