{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057WTSG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057WTSG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057WTSG4","factsUrl":"https://icboms.com/api/mcp/products/BQ2057WTSG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057WTSG4 Li-Ion/Li-Polymer linear charge management IC, 2-cell, 8.4V pack voltage, constant-current programmable, 8-TSSOP package, -20°C to 70°C operating temperature.","salesMarkdown":"## 2-cell Li-Ion/Li-Po charge controller in 8-TSSOP The Texas Instruments BQ2057WTSG4 is a linear charge-management IC designed for 2-cell lithium-ion or lithium-polymer battery stacks. It targets a constant-current, constant-voltage charge profile with a programmable charge current, and the pack voltage is fixed at 8.4 V for the 2-cell series configuration. The operating temperature range is -20°C to 70°C, covering indoor, consumer, and most industrial environments — not rated for automotive underhood or extended high-temp applications. ## Programmable charge current — set it with one resistor The BQ2057WTSG4 uses a constant-current, constant-voltage (CC/CV) algorithm. The charge current is programmable via an external sense resistor, giving the designer flexibility to match the charge rate to the battery capacity. The IC itself does not integrate a power FET — an external pass transistor handles the current path, so the thermal dissipation is off-chip. Supply voltage maximum is 15 V, which gives adequate headroom for a 2-cell stack charged from a regulated 12 V rail or a 9–15 V adapter. The IC monitors cell voltage and terminates charge when the pack reaches 8.4 V. ## Sourcing and RFQ posture No stock-holding claim is made; the procurement desk processes RFQs for this active-order-code line.","metaTitle":"BQ2057WTSG4 Li-Ion/Li-Po Charge Controller, 8-TSSOP, Active","metaDescription":"Texas Instruments BQ2057WTSG4 Li-Ion/Li-Polymer charge controller, 2-cell, 8.4V pack, constant-current programmable, -20°C to 70°C, 8-TSSOP.","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":"Tube","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP (0.173\\\", 4.40mm Width)","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fbq2057","sourceUrl":null},"ai":{"faq":[{"question":"Is BQ2057WTSG4 compatible with 2-cell Li-Polymer batteries?","answer":"Yes, the BQ2057WTSG4 is designed for 2-cell lithium-ion and lithium-polymer battery packs. The charge termination voltage is 8.4 V, which matches a 2-cell series stack. The charge current is programmable, so it can be set to suit the battery's recommended C-rate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057WTSG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057WTSG4 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}}