{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24705RGERG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24705RGERG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ24705RGERG4","factsUrl":"https://icboms.com/api/mcp/products/BQ24705RGERG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ24705 multi-chemistry battery charger IC, 24-VFQFN Exposed Pad package, 2-4 cells, 8A max charge current, 24V supply max, active.","salesMarkdown":"## 8 A charge current, 2–4 cells — sizing the charging rail The BQ24705RGERG4 is a multi-chemistry battery charger IC from Texas Instruments, supporting 2 to 4 series cells with a programmable constant-current charge up to 8 A max. That 8 A ceiling sets the charging speed for a multi-cell pack — at 8 A, a 4-cell 4000 mAh pack charges in about 30 minutes from the constant-current phase, but the thermal dissipation in the 24-VFQFN package (4x4 mm exposed pad) demands a solid PCB thermal via array under the pad to keep junction temperature below the 125 °C absolute max. The supply voltage range tops out at 24 V, which covers typical 2- to 4-cell Li-ion packs (8.4 V to 16.8 V nominal) plus headroom for the charger's own dropout. Over-voltage fault protection is built in — if the input rail spikes above the safe limit, the charger shuts down the power FETs without latching, so the pack and the system see no overstress. ## Package footprint and thermal planning for the 24-VQFN The BQ24705RGERG4 ships in a 24-VFQFN Exposed Pad package (4x4 mm body, 0.5 mm pitch). Without that, the 8 A charge current at 12 V input (96 W throughput) will push the die past 125 °C in a 25 °C ambient. The package is Surface Mount, Tape & Reel (TR) — standard for pick-and-place assembly. The 24-VQFN (4x4) footprint is common across TI's BQ2470x family, so a single PCB layout can serve multiple charger variants if the BOM needs a last-minute swap. ## Active production — ordering and compliance The part is RoHS-compliant and halogen-free per TI's standard green packaging.","metaTitle":"BQ24705RGERG4 TI Battery Charger, 8A, 2-4 Cells, 24VQFN","metaDescription":"Texas Instruments BQ24705RGERG4 multi-chemistry battery charger, 8A max charge current, 2-4 cells, 24V supply max. Active production, sourced to order.","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":"-","Mounting Type":"Surface Mount","Package / Case":"24-VFQFN Exposed Pad","Number of Cells":"2 ~ 4","lifecycle_stage":"eol_hot","Fault Protection":"Over Voltage","Battery Chemistry":"Multi-Chemistry","Current - Charging":"Constant - Programmable","Base Product Number":"BQ24705","Battery Pack Voltage":"18V (Max)","Charge Current - Max":"8A","Operating Temperature":"-40°C~125°C(TJ)","Programmable Features":"-","Voltage - Supply (Max)":"24V","Supplier Device Package":"24-VQFN (4x4)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b2a2aa89792d0da917203dc93aec19bc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ24705RGERG4/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum charge current for BQ24705RGERG4?","answer":"The maximum programmable charge current is 8 A. The actual current is set by an external sense resistor and the ISET pin voltage — the charger regulates constant current up to that limit."},{"question":"What battery chemistries does BQ24705RGERG4 support?","answer":"It supports multi-chemistry batteries — Li-ion, Li-Polymer, and LiFePO4 are all within the programmable voltage and current ranges for 2 to 4 series cells."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24705RGERG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24705RGERG4 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}}