{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4817MHX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4817MHX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM4817MHX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM4817MHX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Boomer® LM4817MHX/NOPB, Class AB audio amplifier, 2-Channel (Stereo), 1.5W x 2 @ 8Ohm, 3V ~ 5.5V supply, 28-HTSSOP, -40°C ~ 85°C, Active, ROHS3.","salesMarkdown":"## Stereo Class AB amplifier for portable and line-powered audio The Texas Instruments LM4817MHX/NOPB is a Boomer® series Class AB stereo audio amplifier delivering 1.5W per channel into an 8Ω load from a 3V to 5.5V supply. It comes in a 28-lead HTSSOP package with an exposed thermal pad for heat sinking. Typical applications include portable speakers, docking stations, LCD monitors, and automotive head units where a simple linear audio stage is preferred over a switching Class D design. ## Supply headroom and thermal budget Rated for 3V to 5.5V, this part runs comfortably from a single lithium-ion cell or a regulated 5V rail. The datasheet's thermal resistance numbers (not reproduced here) guide the PCB copper area needed to keep the junction below 150°C at maximum ambient. ## Built-in depop, shutdown, and thermal protection The LM4817MHX/NOPB integrates pop-suppression circuitry (depop), a shutdown pin for power-save, and thermal-overload protection. The shutdown feature is active-low — pulling the pin low mutes the outputs and drops quiescent current to microamp levels. No external mute transistor or click-elimination RC network is needed for basic operation, though a small capacitor on the bypass pin (per the app note) further reduces turn-on transients.","metaTitle":"Texas Instruments LM4817MHX/NOPB Class AB Audio Amp","metaDescription":"Texas Instruments LM4817MHX/NOPB Boomer® Class AB stereo audio amplifier, 1.5W per channel into 8Ω, 3V–5.5V supply, 28-HTSSOP. 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":"2-Channel (Stereo)","Mounting Type":"Surface Mount","Package / Case":"28-PowerTSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"28-HTSSOP","Max Output Power x Channels @ Load":"1.5W x 2 @ 8Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.23","stockQuantity":0,"priceTiers":[{"qty":245,"price":"$1.23000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/48956512743638dc2646f0ab360387df.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does LM4817MHX/NOPB require external shutdown circuitry?","answer":"No — the shutdown function is integrated. Driving the shutdown pin low (below 0.8V typical) places the amplifier into a low-power state. A logic-level GPIO or a simple SPST switch to ground is sufficient; no external transistor or level shifter is needed."},{"question":"How does LM4817MHX/NOPB compare to LM4818MHX?","answer":"The LM4818MHX is a mono (single-channel) Class AB amplifier in the same Boomer® family, while the LM4817MHX/NOPB is a stereo (2-channel) device. Both operate from a 3V to 5.5V supply and share the same package footprint, but the LM4818 delivers higher output power per channel (2.2W into 3Ω typical) at the cost of a second channel. For stereo applications the LM4817 is the correct choice; for a single higher-power channel the LM4818 fits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4817MHX-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/LM4817MHX-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}}