{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX9737ETG+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX9737ETG","canonicalUrl":"https://icboms.com/analog-devices/MAX9737ETG","factsUrl":"https://icboms.com/api/mcp/products/MAX9737ETG%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX9737ETG+, Class D mono audio amplifier, 13W into 4Ω, 8V to 28V supply, 24-TQFN (4x4) exposed pad, -40°C to 85°C operation.","salesMarkdown":"## Class D mono amplifier for single-speaker audio systems The Maxim Integrated MAX9737ETG+ is a Class D mono audio amplifier delivering 13W into a 4Ω load from a single supply rail spanning 8V to 28V. Its switching topology keeps efficiency high, meaning a smaller heatsink and lower board temperature than a linear amp at the same output power. The device integrates depop circuitry to suppress turn-on clicks, mute control, and full short-circuit and thermal protection, so the BOM stays lean. It is housed in a 24-TQFN (4x4 mm) package with an exposed pad for thermal management. With an industrial temperature range of -40°C to 85°C, this part is rated for environments where the ambient can swing — think outdoor public-address systems, automotive cabin audio, or factory-floor annunciators. The mono output makes it a natural fit for subwoofer channels, single-speaker portable PA units, or bridge-tied-load configurations where a second channel is not needed. ## 13W into 4Ω — what it means for the system The headline output rating of 13W x 1 @ 4Ω sets the acoustic SPL you can expect from a typical 4Ω speaker. This is not a high-power subwoofer driver; it fits medium-sized desktop speakers, soundbars, or ceiling-mount paging horns. The 8V to 28V supply range lets you scale the rail voltage to match the output power target — a 12V supply will deliver less than the full 13W, while a 24V rail gets you closer to the maximum. Plan the power supply headroom accordingly. ## Active lifecycle, no obsolescence risk for new designs There is no last-time-buy notice or end-of-life watch. This makes it a safe choice for a new BOM line or a sustaining design that will run for several years. The part is ROHS3 compliant, meeting the latest EU directive requirements. ## Package and thermal design notes The 24-TQFN (4x4 mm) package with an exposed pad requires a thermal via array under the pad to sink heat into the PCB ground plane. Without adequate thermal management, the device will current-limit or thermally shut down well before reaching the 13W output. The datasheet layout recommendation calls for multiple vias connecting the exposed pad to an inner-layer copper pour. Surface-mount assembly is straightforward with standard reflow profiles for QFN packages.","metaTitle":"MAX9737ETG+ Class D Audio Amp, 13W Mono, 24-TQFN","metaDescription":"Maxim Integrated MAX9737ETG+ Class D mono amplifier delivers 13W into 4Ω. Wide 8V-28V supply, industrial temp range, integrated protections. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Class D","Package":"Tray","Features":"Depop, Mute, Short-Circuit and Thermal Protection, Shutdown","Output Type":"1-Channel (Mono)","Mounting Type":"Surface Mount","Package / Case":"24-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"8V ~ 28V","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"24-TQFN (4x4)","Max Output Power x Channels @ Load":"13W x 1 @ 4Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.56","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.56000","currency":"USD"},{"qty":10,"price":"$3.19700","currency":"USD"},{"qty":75,"price":"$3.02240","currency":"USD"},{"qty":150,"price":"$2.61947","currency":"USD"},{"qty":300,"price":"$2.48510","currency":"USD"},{"qty":450,"price":"$2.22989","currency":"USD"},{"qty":975,"price":"$1.88062","currency":"USD"},{"qty":2400,"price":"$1.78659","currency":"USD"},{"qty":4950,"price":"$1.71942","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX9737.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output power of MAX9737ETG+ at 4 ohms?","answer":"The MAX9737ETG+ delivers 13W into a 4Ω load from a single channel (mono output). This is the maximum rated output under specified conditions."},{"question":"What are the equivalent or alternate parts for MAX9737ETG+?","answer":"Maxim Integrated offers other Class D mono amplifiers in the same family with similar pinouts and package options. For a direct parametric match, review the MAX9737 series datasheet for pin-compatible variants with different output power levels or supply ranges."},{"question":"Does MAX9737ETG+ require an external heatsink?","answer":"The MAX9737ETG+ relies on the exposed pad of the 24-TQFN package to conduct heat into the PCB. Whether an external heatsink is needed depends on the output power level, ambient temperature, and board copper area. At full 13W output into 4Ω in a 85°C ambient, a well-designed thermal via pattern under the pad is typically sufficient without an add-on heatsink, but the thermal simulation should be verified against the application's duty cycle."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX9737ETG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX9737ETG 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}}