{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057WTSTR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057WTSTR","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057WTSTR","factsUrl":"https://icboms.com/api/mcp/products/BQ2057WTSTR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057WTSTR, Li-Ion/Polymer charger IC, 2-cell, 8.4V pack voltage, constant-current programmable, 8-TSSOP package, surface mount, active.","salesMarkdown":"## 2-cell Li-Ion/Polymer charge controller in 8-TSSOP The Texas Instruments BQ2057WTSTR is a constant-current programmable charger IC designed for 2-cell Lithium Ion or Lithium Polymer battery packs, with a target pack voltage of 8.4V. It handles the charge termination and safety timing for portable equipment where the battery stack is two series cells. ## Programmable charge current and supply range Charge current is set by an external resistor — the IC itself is a linear controller, so the power dissipation depends on the input-to-pack voltage differential and the programmed current. Maximum supply input is 15V, which gives headroom for common 12V or 9V wall adapters.","metaTitle":"BQ2057WTSTR Li-Ion/Polymer Charger IC, 2-Cell, 8.4V, Active","metaDescription":"Texas Instruments BQ2057WTSTR is a constant-current programmable Li-Ion/Polymer charger IC for 2-cell packs (8.4V). Active lifecycle, 8-TSSOP package.","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":"-","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP (0.173\\\", 4.40mm Width)","Product Status":"Active","Number of Cells":"2","lifecycle_stage":"eol_hot","Fault Protection":"-","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Base Product Number":"BQ2057","Battery Pack Voltage":"8.4V","Charge Current - Max":"-","Operating Temperature":"-20°C~70°C(TA)","Programmable Features":"Current","Voltage - Supply (Max)":"15V","Supplier Device Package":"8-TSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.4200","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ2057WTSTR/alternatives.json"},"ai":{"faq":[{"question":"Can BQ2057WTSTR charge 2-cell lithium polymer batteries?","answer":"Yes, it is designed for 2-cell Lithium Ion/Polymer packs with a nominal 8.4V pack voltage. The charge current is constant and programmable via an external resistor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057WTSTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057WTSTR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}