{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT3651EUHE-8.4#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT3651EUHE-8.4PBF","canonicalUrl":"https://icboms.com/analog-devices/LT3651EUHE-8.4PBF","factsUrl":"https://icboms.com/api/mcp/products/LT3651EUHE-8.4%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Linear Technology LT3651EUHE-8.4#PBF, Li-Ion/Polymer battery charger IC, 2-cell, 8.4V pack voltage, 4A max charge current, 32V max input, constant-current programmable, over-temp protection, -40°C to 125°C, 36-WFQFN exposed pad, Surface Mount, Tube.","salesMarkdown":"## What this charger does and where it fits The Linear Technology LT3651EUHE-8.4#PBF is a constant-current, programmable Li-Ion/Polymer battery charger IC designed for 2-cell packs with an 8.4V termination voltage. It handles a maximum charge current of 4A and accepts input supplies up to 32V, making it a fit for 12V or 24V automotive and industrial systems where the rail can spike. The junction temperature range spans -40°C to 125°C, so it can live under the hood or in an outdoor enclosure without derating headaches. Fault protection covers over-temperature, and you can program the charge current and a safety timer via external resistors. ## 4A charge current and thermal reality At 4A, the 36-QFN with exposed pad needs a solid thermal via stitch to the ground plane — without it, junction temperature climbs fast. The 32V input ceiling covers automotive load-dump transients if you add a TVS clamp ahead of the IC; the part itself won't survive a direct 60V dump. The 8.4V pack voltage is fixed, not adjustable, so confirm your 2-cell Li-Ion stack matches that termination point — some cells top at 8.4V, others at 8.7V. ## Lifecycle and sourcing For dual-sourcing, the LT3650EMSE-8.4#PBF is a close functional sibling — same 2-cell 8.4V chemistry and 4A capability — but in an MSOP-12 package with a narrower -40°C to 85°C ambient range, so it won't match the full 125°C junction rating of this QFN part. The LT3650EDD-8.4#PBF is another 2-cell option in a 12-DFN, again with the 85°C ceiling. If you need the wide temperature grade, stick with the LT3651EUHE-8.4#PBF.","metaTitle":"LT3651EUHE-8.4#PBF Li-Ion Battery Charger IC, 4A, 32V Input","metaDescription":"Linear Technology LT3651EUHE-8.4#PBF Li-Ion/Polymer battery charger, 2-cell 8.4V, 4A max charge current, 32V input, -40°C to 125°C, 36-QFN. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"36-WFQFN Exposed Pad","Number of Cells":"2","lifecycle_stage":"eol_hot","Fault Protection":"Over Temperature","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Battery Pack Voltage":"8.4V","Charge Current - Max":"4A","Operating Temperature":"-40°C ~ 125°C (TJ)","Programmable Features":"Current, Timer","Voltage - Supply (Max)":"32V","Supplier Device Package":"36-QFN (5x6)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$12.44","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$12.44000","currency":"USD"},{"qty":10,"price":"$11.23500","currency":"USD"},{"qty":25,"price":"$10.71280","currency":"USD"},{"qty":100,"price":"$9.30190","currency":"USD"},{"qty":250,"price":"$8.88384","currency":"USD"},{"qty":500,"price":"$8.10000","currency":"USD"},{"qty":1000,"price":"$7.39500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9237eb6fa94c0f7dc9e66d5204ae3570.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does LT3651EUHE-8.4#PBF require external components?","answer":"Yes — it needs external resistors to program the charge current and safety timer, plus input and output capacitors and an inductor for the switching regulator topology. The datasheet application circuit is the starting point for component selection."},{"question":"Can LT3651EUHE-8.4#PBF charge 2 Li-Ion cells?","answer":"Yes, it is designed for 2-cell Li-Ion or Li-Polymer packs with an 8.4V termination voltage. The number of cells is fixed at 2, not configurable for 1 or 3 cells."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT3651EUHE-8.4PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT3651EUHE-8.4PBF 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}}