{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4920TL/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4920TL-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4920TL-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4920TL%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Boomer® LM4920TL/NOPB, Class AB stereo headphone amplifier, 80mW x 2 into 16Ω, 1.6V-4.2V supply, 14-WFBGA/DSBGA package, -40°C to 85°C.","salesMarkdown":"## What this Boomer® stereo amp delivers The Texas Instruments LM4920TL/NOPB is a Class AB stereo headphone amplifier from the Boomer® series, designed to drive 2-channel (stereo) headphones directly from a battery rail. It delivers 80 mW per channel into a 16 Ω load, which is enough output for most portable headphones and earbuds without requiring an external boost converter. The supply range of 1.6 V to 4.2 V maps directly to a single-cell lithium-ion battery — the amp keeps working from a full cell down to near the end-of-discharge voltage, which is a clean fit for handheld audio products, portable gaming, and wireless earbud charging cases. On-chip features include depop circuitry (eliminates the turn-on thump that can annoy users), a shutdown mode for battery conservation, and thermal protection that prevents the die from overheating if the output is shorted or driven hard into a low-impedance load. ## Package and mounting The LM4920TL/NOPB comes in a 14-WFBGA / 14-DSBGA package — a fine-pitch wafer-level ball-grid array with 14 bumps. That footprint saves board space but demands a controlled reflow profile and a clean solder-paste stencil. If you are hand-reworking this part, pre-bake the board if the moisture-barrier bag has been open past the floor-life window; the small bumps reflow quickly but can be tricky to align without a split-vision microscope. Storage temperature exceeds this, but the part is rated for continuous operation across that full span. ## Lifecycle and supply posture Texas Instruments lists the LM4920TL/NOPB as Active product status and ROHS3 compliant.","metaTitle":"LM4920TL/NOPB Class AB Stereo Headphone Amp, 80mW/ch","metaDescription":"Texas Instruments LM4920TL/NOPB Boomer® Class AB stereo headphone amplifier. 80mW x 2 into 16Ω, 1.6V-4.2V supply, industrial temp. Active, RoHS3.","metaKeywords":null},"attributes":{"series":"Boomer®","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Type":"Class AB","Series":"Boomer®","Package":"Bulk","Features":"Depop, Shutdown, Thermal Protection","Output Type":"Headphones, 2-Channel (Stereo)","Mounting Type":"Surface Mount","Package / Case":"14-WFBGA, DSBGA","lifecycle_stage":"eol_hot","Voltage - Supply":"1.6V ~ 4.2V","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"14-DSBGA","Max Output Power x Channels @ Load":"80mW x 2 @ 16Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.12","stockQuantity":0,"priceTiers":[{"qty":268,"price":"$1.12000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2b37e2d6cd6675c2e4883f867ecd2162.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output power and supply range of LM4920TL/NOPB?","answer":"The supply voltage range is 1.6 V to 4.2 V, which covers a single-cell Li-ion battery from full to nearly empty."},{"question":"Can LM4920TL/NOPB drive 32 ohm headphones?","answer":"Yes, it can drive 32 Ω headphones. The 80 mW rating is specified into 16 Ω; into 32 Ω the output power will be lower (roughly half, following the power = V²/R relationship), but still sufficient for typical headphone listening levels. The supply range and Class AB topology are well suited to this load."},{"question":"What is LM4920TL/NOPB's listed type and series?","answer":"The amplifier type is Class AB, and the series is Boomer® from Texas Instruments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4920TL-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4920TL-NOPB 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}}