{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24105RHLRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24105RHLRG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ24105RHLRG4","factsUrl":"https://icboms.com/api/mcp/products/BQ24105RHLRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments bqSWITCHER series, BQ24105RHLRG4 multi-chemistry battery charger IC, 2 A max charge current, 16 V supply max, 15.5 V battery pack voltage, 20-VQFN (3.5x4.5) package, -40°C to 85°C operating temperature.","salesMarkdown":"## 2 A charge current — sizing the charge path The BQ24105RHLRG4 is a multi-chemistry battery charger IC from the bqSWITCHER series, capable of delivering a programmable constant charge current up to 2 A. That 2 A ceiling sets the charge-time floor for a 1- to 3-series cell pack — a 2000 mAh cell charges in about an hour at full current, assuming the input supply and thermal design can sustain it. The current is set via an external resistor; the IC regulates the charge current to that programmed value until the battery reaches its voltage regulation threshold. ## Supply and pack voltage — input and output limits The maximum supply voltage is 16 V, and the battery pack voltage ceiling is 15.5 V. This means the charger can handle a 12 V adapter or a 5 V USB input (boosted internally) and charge up to three series Li-ion cells (12.6 V full) or a 4-cell LiFePO4 pack (14.4 V full). The 16 V input rating gives about 3 V of headroom above the pack voltage — enough for the internal buck converter to regulate without dropout. ## Package and thermal — 20-VQFN with exposed pad At 2 A charge current, the power loss in the internal FETs can reach 1-2 W depending on input-to-battery voltage differential; the pad-to-ambient thermal resistance is dominated by the PCB copper area.","metaTitle":"TI BQ24105RHLRG4 bqSWITCHER Battery Charger IC, 2 A Max","metaDescription":"Texas Instruments BQ24105RHLRG4 bqSWITCHER multi-chemistry battery charger IC. 2 A max charge current, 16 V supply, 15.5 V pack voltage. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"bqSWITCHER™","Package":"Tape & Reel (TR)","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"20-VFQFN Exposed Pad","Number of Cells":"1 ~ 3","lifecycle_stage":"eol_hot","Fault Protection":"Over Temperature, Over Voltage","Battery Chemistry":"Multi-Chemistry","Current - Charging":"Constant - Programmable","Base Product Number":"BQ24105","Battery Pack Voltage":"15.5V","Charge Current - Max":"2A","Operating Temperature":"-40°C~85°C(TA)","Programmable Features":"Current, Timer","Voltage - Supply (Max)":"16V","Supplier Device Package":"20-VQFN (3.5x4.5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$58.8000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/26d08c6a9886ba7ed4911c20d19d787e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum charge current of BQ24105RHLRG4?","answer":"The maximum charge current is 2 A, programmable via an external resistor. The actual current in the design depends on the input supply capability, the battery voltage, and the thermal dissipation of the PCB layout."},{"question":"Is BQ24105RHLRG4 compatible with LiFePO4 batteries?","answer":"Yes, the BQ24105RHLRG4 supports multi-chemistry batteries, including LiFePO4. The battery pack voltage ceiling of 15.5 V accommodates a 4-cell LiFePO4 pack (14.4 V full charge). The charge voltage and termination current are programmed via external resistors."},{"question":"How to program the charge current on BQ24105RHLRG4?","answer":"The charge current is programmed by connecting a resistor between the ISET pin and ground. The resistor value sets the constant-current charge level up to the 2 A maximum. The IC also includes a programmable timer for charge termination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24105RHLRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24105RHLRG4 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}}