{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ25122YFPR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ25122YFPR","canonicalUrl":"https://icboms.com/texas-instruments/BQ25122YFPR","factsUrl":"https://icboms.com/api/mcp/products/BQ25122YFPR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ25122YFPR, single-cell Li-ion linear charger IC, 300 mA max charge current, I²C programmable, 5.5 V supply max, 25-DSBGA package, -40°C to 125°C.","salesMarkdown":"## Single-cell Li-ion charger in a 25-bump DSBGA The Texas Instruments BQ25122YFPR is a single-cell linear battery charger IC for lithium-ion packs, delivering a constant charge current up to 300 mA. It integrates I²C programmability for both charge current and battery regulation voltage, so you can tune the charge profile in firmware rather than swapping sense resistors. The 25-bump DSBGA package (0.4 mm pitch) keeps the footprint tight — about 2.1 mm × 2.1 mm — suited for wearable, IoT sensor, and portable medical devices where board area is at a premium. ## 300 mA charge ceiling and 4.65 V pack limit The 300 mA maximum charge current sets this part for small-capacity cells — think 100 mAh to 500 mAh Li-ion pouches common in hearables and coin-cell replacements. The battery pack voltage tops out at 4.65 V, which covers standard 4.2 V and 4.35 V Li-ion termination voltages with margin. Input supply maximum is 5.5 V; a typical 5 V USB rail or regulated 5 V bus works without a front-end LDO, though the linear topology means thermal dissipation at full current needs a layout that moves heat through the DSBGA bumps to the PCB copper. Built-in fault protection covers over-temperature, over-voltage, and short-circuit conditions. That reduces the external component count — no separate supervisor IC for the charge path. The I²C interface lets a host MCU read fault flags and adjust charge parameters on the fly, which is useful for multi-chemistry or multi-format battery bays. ## 25-DSBGA: layout gotchas The 25-bump DSBGA uses a 0.4 mm ball pitch — standard for fine-pitch BGA assembly but requires a solder-mask-defined pad on the PCB. No exposed thermal pad — all heat exits through the bump array into the PCB copper.","metaTitle":"BQ25122YFPR Li-ion Battery Charger IC, 300 mA, I²C, DSBGA-25","metaDescription":"Texas Instruments BQ25122YFPR single-cell Li-ion charger IC with 300 mA max charge current, I²C programmable voltage/current, -40°C to 125°C range.","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 Temperature, Over Voltage, Short Circuit","Battery Chemistry":"Lithium Ion","Current - Charging":"Constant","Base Product Number":"BQ25122","Battery Pack Voltage":"4.65V (Max)","Charge Current - Max":"300mA","Operating Temperature":"-40°C~125°C(TJ)","Programmable Features":"Current, 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/8c27157ac255eba014e701a308259569.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum charge current of the BQ25122YFPR?","answer":"The maximum charge current is 300 mA."},{"question":"What is the I²C interface used for on the BQ25122YFPR?","answer":"The I²C interface allows a host microcontroller to program the charge current and battery regulation voltage, read fault status, and enable/disable charging. This eliminates the need for external resistor dividers and lets the same hardware support different battery chemistries or capacities via firmware."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ25122YFPR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ25122YFPR 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}}