{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3947ISD-09","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3947ISD-09","canonicalUrl":"https://icboms.com/texas-instruments/LP3947ISD-09","factsUrl":"https://icboms.com/api/mcp/products/LP3947ISD-09","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3947ISD-09 battery charger IC, single-cell Li-Ion, I²C and USB interface, 750mA max charge current, 4.1V pack voltage, 14-WFDFN exposed pad package.","salesMarkdown":"## Single-cell Li-Ion charge management with digital control The LP3947ISD-09 is a power-supply support circuit that manages constant-current, constant-voltage charging for a single lithium-ion cell, with a maximum charge current of 750 mA and a regulated battery pack voltage of 4.1 V. The I²C and USB interface allows a host microcontroller to program the charge current and monitor charge status, making it suitable for portable devices where the charging profile must adapt to the input source or battery condition. ## Charge safety and protection Built-in over-voltage fault protection disables the charger if the battery voltage exceeds safe limits, preventing cell damage during a fault condition. Housed in a 14-lead WFDFN with an exposed pad (14-WSON 4x4 mm), the package requires a thermal land on the PCB to dissipate heat from the charge pass element and the power supply support circuitry. ## Lifecycle and compliance RoHS non-compliant per the manufacturer's current declaration – verify exemption eligibility or plan for an alternate sourcing path if RoHS compliance is required for the end product.","metaTitle":"Texas Instruments LP3947ISD-09 Li-Ion Charger, 750mA","metaDescription":"Texas Instruments LP3947ISD-09 single-cell Li-Ion battery charger. I²C/USB interface, 750mA max charge current, 4.1V pack voltage. Active, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Package":"Bulk","Interface":"I²C, USB","Mounting Type":"Surface Mount","Package / Case":"14-WFDFN Exposed Pad","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Voltage","Battery Chemistry":"Lithium Ion","Current - Charging":"Constant - Programmable","Battery Pack Voltage":"4.1V","Charge Current - Max":"750mA","Operating Temperature":"-40°C ~ 85°C (TA)","Voltage - Supply (Max)":"6V","Supplier Device Package":"14-WSON (4x4)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.47","stockQuantity":0,"priceTiers":[{"qty":205,"price":"$1.47000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f0896f3a86ab46aab9af356769081c96.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is LP3947ISD-09's listed interface?","answer":"The LP3947ISD-09 supports both I²C and USB interfaces, allowing a host controller to program the charge current and read status over the I²C bus while the USB port serves as the power input."},{"question":"Is LP3947ISD-09 RoHS compliant?","answer":"No, the manufacturer declares the LP3947ISD-09 as RoHS non-compliant. Confirm whether your application qualifies for a RoHS exemption or if a compliant alternative is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3947ISD-09","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP3947ISD-09 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}}