{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ25121YFPT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ25121YFPT","canonicalUrl":"https://icboms.com/texas-instruments/BQ25121YFPT","factsUrl":"https://icboms.com/api/mcp/products/BQ25121YFPT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ25121YFPT, single-cell Li-Ion linear battery charger, 300 mA max charge current, I²C programmable, over-voltage protection, 25-bump DSBGA package, -40°C to 125°C operating range.","salesMarkdown":"## Single-cell Li-Ion charger with I²C trim — 300 mA ceiling The Texas Instruments BQ25121YFPT is a linear battery charger for single-cell Lithium-Ion packs, delivering a programmable charge current up to 300 mA. The charge current is set over I²C, so the charging profile can be tuned in firmware without a resistor swap. Over-voltage protection is built in. ## NRND — not for new designs That means TI will continue to supply it for existing production, but new BOMs should target a current-production alternate.","metaTitle":"BQ25121YFPT Li-Ion Charger IC, 300 mA, I²C, DSBGA-25","metaDescription":"Texas Instruments BQ25121YFPT single-cell Li-Ion linear charger, 300 mA max, I²C programmable, -40°C to 125°C, 25-DSBGA.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"I²C","Mounting Type":"Surface Mount","Package / Case":"25-XFBGA, DSBGA","Product Status":"Not For New Designs","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Voltage","Battery Chemistry":"Lithium Ion","Current - Charging":"Constant - Programmable","Base Product Number":"BQ25121","Battery Pack Voltage":"4.2V","Charge Current - Max":"300mA","Operating Temperature":"-40°C~125°C(TJ)","Programmable Features":"Current","Voltage - Supply (Max)":"5.5V","Supplier Device Package":"25-DSBGA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.6100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6e493db6790ce0a56fd214cc06311190.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the direct replacement for BQ25121YFPT?","answer":"No official successor is listed on the record. For a current-production alternative within the same charger family, review the BQ2512x series — confirm pin-compatibility and feature set against the BQ25120."},{"question":"BQ25121YFPT vs BQ25120 key differences","answer":"Both are single-cell Li-Ion linear chargers in the same DSBGA package. The BQ25120 adds a buck converter and power-path management; the BQ25121YFPT is a charger-only part with I²C-programmable current. Pin-compatibility should be verified against the respective datasheets."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ25121YFPT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ25121YFPT 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}}