{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24055DSST","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24055DSST","canonicalUrl":"https://icboms.com/texas-instruments/BQ24055DSST","factsUrl":"https://icboms.com/api/mcp/products/BQ24055DSST","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ24055DSST single-cell Li-Ion/Polymer linear battery charger, USB interface, 800 mA max charge current, 4.2 V battery voltage, 28 V max supply, 12-WSON (2x3) package.","salesMarkdown":"## Single-cell USB charger in a 2x3 mm WSON The Texas Instruments BQ24055DSST is a linear single-cell Li-Ion/Polymer charger IC designed for USB-powered portable devices. It charges a 4.2 V battery pack at a programmable constant current up to 800 mA, with the input supply rated to 28 V maximum. The 12-WSON (2x3 mm) package with exposed pad provides a thermal path through the pad to the PCB copper. ## Charge current and protection — what sets the BOM The 800 mA maximum charge current is set with a single programming resistor, giving the BOM engineer control over the charge rate without a separate current-sense resistor. The constant-current phase is programmable; the termination voltage is fixed at 4.2 V for standard single-cell Li-Ion and Li-Polymer packs. On-chip fault protection covers over-temperature, over-voltage, and short-circuit conditions — these reduce the external component count compared to a charger that requires a separate supervisor IC or thermistor network. The BQ24055DSST is listed as Obsolete by Texas Instruments.","metaTitle":"BQ24055DSST USB Li-Ion Charger IC, 800 mA, 12-WSON","metaDescription":"Texas Instruments BQ24055DSST single-cell Li-Ion/Polymer linear charger with USB interface. 800 mA max charge current, 4.2 V battery voltage, 28 V input max.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"USB","Mounting Type":"Surface Mount","Package / Case":"12-WFDFN Exposed Pad","Product Status":"Obsolete","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Temperature, Over Voltage, Short Circuit","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Base Product Number":"BQ24055","Battery Pack Voltage":"4.2V","Charge Current - Max":"800mA","Operating Temperature":"0°C~125°C(TJ)","Programmable Features":"Current","Voltage - Supply (Max)":"28V","Supplier Device Package":"12-WSON (2x3)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9d456077ff50bae65c6ef17642eed549.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum charge current of BQ24055DSST?","answer":"The maximum charge current is 800 mA, programmable with a single resistor. The constant-current phase is adjustable below that ceiling."},{"question":"Can BQ24055DSST charge a 4.2 V battery?","answer":"Yes, the battery pack voltage is fixed at 4.2 V, matching standard single-cell Li-Ion and Li-Polymer termination voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24055DSST","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24055DSST 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}}