{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24157SYFFR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24157SYFFR","canonicalUrl":"https://icboms.com/texas-instruments/BQ24157SYFFR","factsUrl":"https://icboms.com/api/mcp/products/BQ24157SYFFR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ24157SYFFR, single-cell Li-Ion/Polymer linear charger IC, I²C programmable charge current up to 1.25 A, over-temperature and over-voltage protection, 20-DSBGA package, -30°C to 85°C operation.","salesMarkdown":"## Single-cell Li-Ion charger with I²C programmability The Texas Instruments BQ24157SYFFR is a single-cell Li-Ion/Polymer linear charger IC that uses an I²C interface to set the charge current, making it a firmware-adjustable power management component for portable devices. Maximum charge current is 1.25 A — enough for a typical 1000–1500 mAh cell to charge in about an hour, but the I²C bus lets the system throttle current down for thermal management or trickle charging a deeply discharged cell. The chip integrates over-temperature and over-voltage fault protection, so the BOM does not need a separate supervisor for those conditions. ## What the 1.25 A charge current and I²C control mean for your BOM At 1.25 A the pass element dissipates (Vin – Vbat) × 1.25 A as heat. With a 5 V input and a 3.7 V cell, that is about 1.6 W — the DSBGA package relies on the PCB copper for thermal spreading, so a 2-layer board with a solid ground plane under the IC is recommended. The I²C interface (address 0x6B) gives the host full control over the charge current in programmable steps, plus read-back of fault and status bits. No external resistor divider is needed for current setting — the firmware sets it. Battery pack voltage is limited to 4.44 V max, which covers the standard 4.2 V and 4.35 V Li-Ion/Polymer termination voltages with margin. ## Package and layout considerations for the DSBGA The 20-DSBGA package (0.5 mm pitch, 0.25 mm ball diameter) requires a solder-mask-defined pad and a stencil aperture that matches the datasheet land pattern. Reflow profile must follow the JEDEC MSL-1 moisture sensitivity — no bake needed if the shelf life is respected. Surface-mount only — the DSBGA is not hand-solderable; a hot-air rework station with a fine nozzle and a preheat plate is the minimum for rework.","metaTitle":"BQ24157SYFFR Li-Ion Charger IC, 1.25 A Max, I²C, DSBGA-20","metaDescription":"Texas Instruments BQ24157SYFFR single-cell Li-Ion/Polymer charger with I²C interface.","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":"I²C","Mounting Type":"Surface Mount","Package / Case":"20-UFBGA, DSBGA","Product Status":"Active","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Temperature, Over Voltage","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Base Product Number":"BQ24157","Battery Pack Voltage":"4.44V (Max)","Charge Current - Max":"1.25A","Operating Temperature":"-30°C~85°C(TA)","Programmable Features":"Current","Voltage - Supply (Max)":"6V","Supplier Device Package":"20-DSBGA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.7595","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1e82ee7d6fb3026ab2d14b6357bf0f26.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum charge current for BQ24157SYFFR?","answer":"The maximum charge current is 1.25 A, programmable via the I²C interface."},{"question":"Does BQ24157SYFFR have I2C interface for charge control?","answer":"Yes, the BQ24157SYFFR uses an I²C interface for setting the charge current and reading status/fault bits."},{"question":"Is BQ24157SYFFR compatible with single cell Li-Po?","answer":"Yes, the battery chemistry is listed as Lithium Ion/Polymer, and the number of cells is 1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24157SYFFR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24157SYFFR 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}}