{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24040DSQR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24040DSQR","canonicalUrl":"https://icboms.com/texas-instruments/BQ24040DSQR","factsUrl":"https://icboms.com/api/mcp/products/BQ24040DSQR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ24040DSQR single-cell Li-Ion/Polymer linear charger IC, 1A max programmable charge current, 28V input rating, constant-current programmable, fault protection (OT/OV/SC), 10-WSON exposed pad package, -40°C to 85°C.","salesMarkdown":"## 28V input rating — why this charger survives what others don't Its 28V maximum supply voltage lets it ride through automotive load-dump transients or 24V industrial bus faults without an external clamp — a feature that saves a TVS diode and PCB area on the BOM. The charge current is constant-current programmable up to 1A, set by an external resistor, and the part includes built-in over-temperature, over-voltage, and short-circuit fault protection. ## 1A charge current and thermal budget At the full 1A charge current, the linear architecture dissipates power as heat — the 10-WSON exposed pad (2x2 mm) is the thermal path. A layout engineer should stitch vias under the pad to a copper pour on the bottom layer; without that, the junction temperature climbs quickly above 85°C ambient. ## Fault protection set — fewer external parts Over-temperature, over-voltage, and short-circuit protection are integrated, which simplifies safety certification and reduces external component count. The 4.2V battery pack voltage is fixed — the part is designed for standard Li-ion termination at 4.2V, so a 4.2V battery is the correct match. Surface-mount in a 10-WFDFN exposed-pad package, supplier device package 10-WSON (2x2 mm). For a buyer filling a BOM line, this is a standard active part with no near-term obsolescence risk.","metaTitle":"BQ24040DSQR Li-Ion Battery Charger IC, 1A, 28V, 10-WSON","metaDescription":"Texas Instruments BQ24040DSQR single-cell Li-Ion/Polymer charger IC. 1A programmable charge current, 28V input max, -40°C to 85°C, 10-WSON. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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":"10-WFDFN Exposed Pad","Product Status":"Active","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":"BQ24040","Battery Pack Voltage":"4.2V","Charge Current - Max":"1A","Operating Temperature":"-40°C~85°C(TA)","Programmable Features":"Current","Voltage - Supply (Max)":"28V","Supplier Device Package":"10-WSON (2x2)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4600","priceTiers":[{"qty":1,"price":"$1.46000","currency":"USD"},{"qty":10,"price":"$1.30100","currency":"USD"},{"qty":25,"price":"$1.23480","currency":"USD"},{"qty":100,"price":"$1.01420","currency":"USD"},{"qty":250,"price":"$0.94808","currency":"USD"},{"qty":500,"price":"$0.83782","currency":"USD"},{"qty":1000,"price":"$0.66144","currency":"USD"},{"qty":3000,"price":"$0.62400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2629fcd18e6f009a6db9893aa69a7d39.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ24040DSQR/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum charge current for BQ24040DSQR?","answer":"The maximum charge current is 1A, programmable via an external resistor. The charge current is constant-current type."},{"question":"Is BQ24040DSQR compatible with 4.2V batteries?","answer":"Yes. The battery pack voltage is fixed at 4.2V, which is the standard termination voltage for single-cell Li-Ion and Li-Polymer batteries."},{"question":"What is the replacement or equivalent for BQ24040DSQR?","answer":"The BQ24040 family includes other charge-current variants, but pin compatibility should be verified against the respective datasheets. For dual-sourcing, contact TI directly or evaluate the BQ24040 base product number family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24040DSQR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24040DSQR 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}}