MP7748SGF - 2x30W Stereo Class D Amplifier | Monolithic Power Systems Inc.
MPN： MP7748SGF ✓ 啟用中MP7748SGF 概覽
A Class D audio amplifier is a switching power amplifier that delivers energy to speakers through a continuously switching output stage. Compared with a linear Class A/B amplifier, its practical advantage is lower output-stage dissipation and higher efficiency, although filtering is still required to remove switching-frequency energy. In stereo mode, the MP7748SGF uses two independent single-ended speaker outputs; in mono mode, its outputs can be combined in bridge-tied-load configuration to double the voltage swing delivered to one speaker while avoiding a DC offset across the speaker.
Key verified features include integrated 200 mΩ power MOSFETs, startup and shutdown pop-elimination circuitry, and short-circuit protection. The manufacturer material describes a proprietary variable-frequency topology intended to provide high fidelity comparable to Class A/B amplification. Under 24 V VDD, the manufacturer material states capability for 30 W per channel into a 4 Ω load in single-ended operation and 60 W into an 8 Ω speaker in bridge-tied-load operation. The exposed pad supports heat transfer from the power stage, but thermal performance still depends on PCB copper, layer count, airflow, load duration, and adjacent heat sources.
Typical uses include consumer speakers, multimedia audio, compact stereo systems, sound bars, portable powered speakers, and mono subwoofer or full-range speaker designs. The MP7748SGF is appropriate when local analog amplification is preferred and a Class D efficiency advantage is useful, but it may not suit systems that require a digital input because the verified material identifies an analog-input family.
For layout, follow the manufacturer datasheet connection and thermal recommendations exactly. Keep the exposed-pad thermal path unobstructed, provide adequate input and output filtering, and account for switching-node layout and ground-return control. Do not assume a generic 28-pin footprint or replace the amplifier without checking exposed-pad geometry, pin names, thermal requirements, and load compatibility.
This page consolidates manufacturer specifications, distributor listings, cross-reference evidence, and practical Class D design guidance. Exact pricing, lifecycle status, complete electrical limits, and several physical details were not supplied by the verified sources and are therefore identified rather than guessed.
直接替換替代品，適用於 MP7748SGF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MP7748SGF （相同外形與佔位） — 差異在於 Input Type, Package, Stereo Output Power.
MP7748SGF-Z
✅ 直接替換聯絡詢價
查看資料表 →MP7748SGF 最大額定值與電氣特性
| Amplifier Type | Class D audio power amplifier |
| Channel Configuration | 1-channel mono or 2-channel stereo |
| Stereo Output Power | 2 x 30 W into 4 ohm at 24 V VDD |
| Mono Bridge-Tied-Load Output Power | 60 W into 8 ohm at 24 V VDD |
| Alternative Mono Output Power | 50 W into 6 ohm at 24 V VDD |
| 供應電壓 | 24 V VDD cited for stated output-power conditions |
| Output Stage | Integrated 200 mOhm power MOSFETs |
| 拓撲 | Proprietary variable-frequency Class D topology |
| Protection | Short-circuit protection |
| Startup/Shutdown Feature | Startup and shutdown pop-elimination circuits |
| 封裝 | 28-pin TSSOP with exposed pad |
| 安裝類型 | Surface mount |
| Input Type | Analog audio input |
| RoHS 狀態 | RoHS compliant |
MP7748SGF 28-pin tssop with exposed pad 腳位配置指南
MP7748SGF（28-pin tssop with exposed pad 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MP7748SGF.
請參閱 資料表 以查看完整腳位配置。
典型應用
MP7748SGF 適用於 6 應用s: Compact Stereo Speaker, Mono Bridge-Tied-Load Speaker, Consumer Multimedia Speaker, Powered Sound Bar, Portable Powered Speaker, Analog Audio Subwoofer.
Compact Stereo Speaker
The MP7748SGF fits a compact powered stereo speaker because the manufacturer specifies 2 x 30 W per channel into 4 ohm at 24 V VDD in single-ended operation. Its integrated Class D power stage reduces the external output-component count, while the variable-frequency topology is intended to preserve high-fidelity audio performance. Use the recommended LC output filtering, local supply decoupling, and exposed-pad thermal layout from the manufacturer datasheet. The design must also accommodate amplifier heat and verify that the speaker enclosure and supply can sustain the stated output condition.
推薦
Mono Bridge-Tied-Load Speaker
For a single speaker, the MP7748SGF can be used in bridge-tied-load configuration, with the manufacturer citing 60 W into 8 ohm at 24 V VDD. BTL doubles the effective output voltage swing compared with a single-ended drive and removes the speaker's DC offset, which is useful in subwoofer and powered-monitor designs. The output network and filter must be designed for bridge operation, and the speaker must tolerate the resulting voltage and power. Confirm thermal conditions and protection behavior in the datasheet.
推薦
Consumer Multimedia Speaker
The MP7748SGF is suitable for consumer multimedia systems where an analog audio signal must drive stereo speakers efficiently. Its integrated 200 mOhm power MOSFETs, startup/shutdown pop-elimination circuits, and short-circuit protection address common implementation issues in compact powered speakers. The verified 24 V capability should be matched to the system supply rather than inferred from the package. Place filtering and decoupling exactly as recommended, maintain a short return path for power current, and validate audible artifacts across the full volume and startup range.
推薦
Powered Sound Bar
A sound bar can use the MP7748SGF when it needs efficient stereo amplification in a constrained enclosure and accepts an analog feed. The family's 2 x 30 W stereo capability at 24 V VDD provides a defined design target, while integrated power MOSFETs reduce board area. Sound-bar designs must account for multiple channels, chassis acoustics, idle behavior, and heat spreading across the complete amplifier board. Use the exposed pad as part of the thermal design and validate EMI behavior around the switching output nodes.
推薦
Portable Powered Speaker
The MP7748SGF can serve as the output stage in a portable powered speaker when its 24 V-class operating condition matches the available supply and the product accepts analog input. Class D operation is useful in portable equipment because it can improve power-conversion efficiency compared with a linear output stage. Battery range, peak-current capability, enclosure temperature, and startup behavior are as important as nominal speaker wattage. The verified material does not identify a portable qualification, so validate those requirements independently.
推薦
Analog Audio Subwoofer
The MP7748SGF's mono BTL capability makes it relevant for an analog subwoofer or compact full-range speaker enclosure. The manufacturer cites 60 W into 8 ohm at 24 V VDD, which is a useful starting point for enclosure and transformerless speaker matching, although actual output depends on supply, load tolerance, and thermal conditions. A BTL output must not be connected to ground, and the output filter must preserve signal integrity without excessive attenuation. Verify idle offset, protection recovery, and EMI in the finished system.
推薦
推薦產品摘要
工程參考資料，適用於 MP7748SGF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MP7748SGF-Z |
|---|---|---|
| Brand | Monolithic Power Systems | Monolithic Power Systems |
| Package | 28-TSSOP-EP | 28-TSSOP-EP |
| Amplifier Class | Class D | Class D |
| Channel Configuration | Mono or stereo | Mono or stereo |
| Stereo Output Power | 2 x 30 W into 4 ohm at 24 V VDD | 2 x 30 W into 4 ohm at 24 V VDD |
| Mono BTL Output Power | 60 W into 8 ohm at 24 V VDD | 60 W into 8 ohm at 24 V VDD |
| Output Stage | Integrated 200 mOhm power MOSFETs | Integrated 200 mOhm power MOSFETs |
| Protection | Short-circuit protection | Short-circuit protection |
| Startup and Shutdown | Pop-elimination circuits | Pop-elimination circuits |
| Topology | Proprietary variable-frequency Class D | Proprietary variable-frequency Class D |
| Price at Quantity 1 | Not provided | Not provided |
主要差異化特點
- Single integrated family supports stereo and mono use (對比MP7748SGF-Z)
- Defined high-power output configurations (對比MP7748SGF-Z)
- Integrated protection and startup control (對比MP7748SGF-Z)
設計說明
Use the exposed pad as a deliberate thermal structure, not merely a footprint feature. Preserve the manufacturer's solder-pad geometry, provide uninterrupted copper beneath the IC, and use the recommended thermal vias and copper spreading pattern. The verified family reaches 2 x 30 W stereo or 60 W mono BTL at 24 V VDD, so validate temperature rise in the actual enclosure and speaker-load duration rather than relying on nominal output power alone.
Place input, supply, ground, and output-filter components according to the manufacturer reference layout. Keep high-current output returns short and keep switching-node copper away from audio input traces. The MP7748S uses a proprietary variable-frequency Class D topology, so layout inductance and return-path discontinuities can increase EMI and audio artifacts. Do not improvise exposed-pad connections or output-filter values without checking the datasheet.
A bridge-tied-load output must never be connected to system ground or to another amplifier output. Confirm whether the design is stereo single-ended or mono BTL before wiring the speaker. Also verify the speaker's minimum impedance, the 24 V supply requirement stated by the manufacturer for the headline power figures, and the availability of startup/shutdown pop suppression. A nominally compatible amplifier can still fail if these system conditions are wrong.
合規資訊
RoHS compliance is stated in the verified distributor search result. REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals information were not supplied for the exact MP7748SGF family.
