{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4851ITL","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4851ITL","canonicalUrl":"https://icboms.com/texas-instruments/LM4851ITL","factsUrl":"https://icboms.com/api/mcp/products/LM4851ITL","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Boomer® Class AB audio amplifier, LM4851ITL, 1-Channel (Mono) with Stereo Headphones, 1.5W x 1 @ 4Ohms + 115mW x 2 @ 32Ohms, 2.6V ~ 5V supply, 18-WFBGA, Surface Mount.","salesMarkdown":"## Class AB audio amplifier with mono speaker and stereo headphone outputs The Texas Instruments LM4851ITL is a Boomer® Class AB audio amplifier that delivers 1.5W into a 4Ω mono speaker load while simultaneously driving 115mW per channel into 32Ω stereo headphones, all from a 2.6V to 5V supply. This output architecture suits portable devices where a single speaker handles ringtones or hands-free calls and a headphone jack provides private listening — the amplifier handles both loads from one IC. ## Integrated features for portable audio design Built-in depop circuitry suppresses the audible pop and click when the amplifier transitions between shutdown and active states, eliminating the need for external muting FETs or series capacitors on the output. A SPI bus provides digital volume control and allows the host processor to adjust gain without a separate potentiometer or resistor network — the interface also reads back fault status from the thermal protection block. Thermal protection shuts down the output stage if the die temperature exceeds the safe operating limit, protecting the speaker load and the IC during sustained high-power playback in a confined enclosure. Housed in an 18-bump WFBGA (18-uSMD, 1.97x2.23 mm), the LM4851ITL requires a surface-mount reflow profile compatible with lead-free solder — the small footprint saves board area in space-constrained portable designs. The 2.6V to 5V supply range covers single-cell Li-ion battery voltage (3.0-4.2V) with margin for the battery's full discharge curve, so the amplifier continues operating down to the battery's undervoltage lockout threshold. RoHS compliance is not claimed for this date-code variant — the part is listed as RoHS non-compliant, which matters for BOMs that must meet EU RoHS exemption thresholds or customer-specific green-material declarations.","metaTitle":"Texas Instruments LM4851ITL Boomer® Class AB Audio Amp, 1.5W","metaDescription":"Texas Instruments LM4851ITL Boomer® Class AB audio amplifier, 1.5W mono + 115mW stereo headphones, 2.6-5V supply, 18-uSMD. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":"Boomer®","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Class AB","Series":"Boomer®","Package":"Bulk","Features":"Depop, Shutdown, SPI, Thermal Protection, Volume Control","Output Type":"1-Channel (Mono) with Stereo Headphones","Mounting Type":"Surface Mount","Package / Case":"18-WFBGA","lifecycle_stage":"eol_hot","Voltage - Supply":"2.6V ~ 5V","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"18-uSMD (1.97x2.23)","Max Output Power x Channels @ Load":"1.5W x 1 @ 4Ohms; 115mW x 2 @ 32Ohms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.83","stockQuantity":0,"priceTiers":[{"qty":361,"price":"$0.83000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ebbb5f490d37edc3ccbd1ce02ca95e5e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LM4851ITL and how do I get a price?","answer":"The LM4851ITL is sourced to order through independent distribution."},{"question":"What is LM4851ITL's listed type (Class AB) on this Analog & Data Acquisition line?","answer":"The LM4851ITL is a Class AB audio amplifier. Class AB topology combines the linearity of Class A with the efficiency of Class B, making it a common choice for battery-powered portable audio where distortion below 0.1% THD is required at moderate output levels."},{"question":"What compliance documentation does Texas Instruments provide for LM4851ITL (RoHS, REACH, UL, IEC)?","answer":"Texas Instruments lists the LM4851ITL as RoHS non-compliant. Buyers requiring full material declaration or exemption status should request the manufacturer's compliance report at RFQ time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4851ITL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4851ITL 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}}