MP7747DQ-LF-P - 20W Mono Class D Audio Amplifier | MPS
料号： MP7747DQ-LF-P ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MP7747DQ-LF-P 概述
A Class D amplifier is a switching audio power amplifier whose output stage operates between active and inactive states instead of dissipating a continuous quiescent current through linear output transistors. This improves conversion efficiency while PWM-based switching creates a modulated output waveform that must pass through a speaker-network filter before driving a conventional speaker. The MP7747 uses MPS variable-frequency topology to provide high fidelity, fast response, and operation from a single power supply.
The MP7747 integrates 250 mΩ power MOSFETs, start-up and shutdown pop elimination, and short-circuit protection. Its switching frequency can reach 1 MHz, reducing the size and propagation delay of the output LC filter. The mono, single-ended architecture suits compact speaker systems that need substantial output from a relatively compact amplifier module.
Key application considerations include output-current capability into 4 ohm and 8 ohm speakers, supply decoupling, exposed-pad thermal management, filter selection, and correct grounding. The integrated protections simplify short-circuit handling, but designers must still verify maximum output power, copper temperature, and speaker impedance under worst-case supply and thermal conditions.
The MP7747 is suitable for portable speakers, multimedia speakers, compact consumer audio, industrial audio modules, and powered speaker subsystems where a mono 20 W Class D amplifier is sufficient. The official Monolithic Power Systems product page identifies the MP7747 as a fully integrated Class D audio amplifier with a single-ended output structure.
直接替换替代料： MP7747DQ-LF-P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MP7747DQ-LF-P （相同外形与封装尺寸） ——差异在于 Package, Product Type, Short-Circuit Protection.
快速对比工具——选择替代料号进行并排对比：
MP7747DQ-LF-Z
✅ 直接替换✓ 有现货
$0.868 / 个
查看数据手册 →MP7747DQ-LF-P 最大额定值与电气特性
| Product Type | Mono Class D audio amplifier |
| Channel Count | 1 channel |
| Output Power | 20 W at VDD = 24 V into 4 ohm load |
| Supply Voltage Range | 9.5 V to 36 V |
| 输出配置 | Single-ended |
| THD+N | 0.02% at 1 W |
| 效率 | 91% at 20 W, VDD = 24 V, into 8 ohm load |
| 输出噪声 | 103 µV typical |
| Maximum Switching Frequency | 1 MHz |
| Integrated Power MOSFET Resistance | 250 mΩ |
| Short-Circuit Protection | Integrated |
| Start-Up and Shutdown Pop Elimination | Integrated |
| 封装 | 10-pin QFN-EP, 3 x 3 mm |
| 工作温度范围 | -40°C to +125°C |
| 安装类型 | Surface mount |
| Packaging | Tape and reel; 500 units per reel |
MP7747DQ-LF-P 10-pin qfn-ep, 3 x 3 mm 引脚配置指南
MP7747DQ-LF-P（10-pin qfn-ep, 3 x 3 mm 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： MP7747DQ-LF-P.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MP7747DQ-LF-P 适用于 7 应用s: Compact Powered Speaker, Portable Multimedia Speaker, Industrial Audio Module, Soundbar or Monitor Speaker Module, Portable Bluetooth Speaker, USB or DC-Powered Speaker, Compact Guitar or Instrument Monitor.
Compact Powered Speaker
The MP7747DQ-LF-P fits a compact mono powered speaker requiring approximately 20 W at 24 V into a 4 ohm load. Its single-ended Class D architecture can drive the speaker through a suitable output filter while reducing the amplifier size compared with a linear solution. The 91% efficiency at 20 W into an 8 ohm load can reduce heat in the enclosure, although the actual acoustic enclosure temperature still depends on output duration, copper area, ambient temperature, and speaker load.
推荐
Portable Multimedia Speaker
For portable consumer audio, the MP7747DQ-LF-P provides a single-ended 20 W Class D output stage from a 9.5 V to 36 V supply range. Its integrated 250 mΩ power MOSFETs reduce external power-stage complexity, while startup and shutdown pop elimination helps reduce audible transients. Battery-powered products must still verify available voltage, peak output current, speaker impedance, and thermal performance because the verified data does not specify battery-endpoint limits or protection thresholds.
推荐
Industrial Audio Module
The MP7747DQ-LF-P is suitable for an industrial speaker module where compactness, efficiency, and integrated short-circuit protection matter. A 24 V system can use the documented 20 W condition into 4 ohms, while the 1 MHz maximum switching frequency supports a compact output-filter design. Industrial products should still validate conducted and radiated emissions, enclosure acoustics, grounding over long cable runs, and the amplifier's behavior after repeated fault conditions.
推荐
Soundbar or Monitor Speaker Module
A monitor, television, or compact soundbar subwoofer can use the MP7747DQ-LF-P when a mono speaker path is sufficient and the amplifier is placed close to the driver. The single-ended output reduces the external power-stage count, while the 9.5 V to 36 V supply range allows integration with common power rails. The output filter, grounding, and exposed-pad thermal design must be validated at the lowest expected supply voltage and with the actual speaker impedance.
推荐
Portable Bluetooth Speaker
The MP7747DQ-LF-P can serve as the power stage in a Bluetooth speaker when the audio source provides an analog signal and the speaker is compatible with a single-ended Class D output. Its 20 W capability is appropriate for a compact full-range or woofer driver, and the high efficiency can help limit battery stress. Designers must add the Bluetooth audio's own power sequencing and protection strategy and must confirm that the amplifier's switching behavior does not create unacceptable EMI or acoustic artifacts.
推荐
USB or DC-Powered Speaker
For USB or DC-powered speaker products, the MP7747DQ-LF-P is suitable only when the available supply rail remains within its 9.5 V to 36 V operating range and supports the required current. The documented 20 W output condition uses 24 V and a 4 ohm load, so a 5 V USB source will not provide the same power level. Verify input filtering, supply transients, speaker wiring, and the amplifier's start-up behavior before selecting it for a low-voltage system.
推荐
Compact Guitar or Instrument Monitor
The MP7747DQ-LF-P can drive a small speaker in a guitar monitor or instrument monitoring product when the desired output level is within the verified 20 W Class D power capability. The amplifier's 0.02% THD+N at 1 W and 103 µV typical output noise provide useful baseline performance data for a compact sound system. It is not automatically the best choice for very low-latency, high-linearity studio monitoring; analog front-end quality, output filtering, and speaker loading remain important.
推荐
推荐产品汇总
工程参考数据： MP7747DQ-LF-P ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MP7747DQ-LF-Z |
|---|---|---|
| Brand | Monolithic Power Systems | Monolithic Power Systems |
关键差异点
- High documented power efficiency for a compact mono amplifier （对比 MP7747DQ-LF-Z)
- Integrated high-side and low-side power-stage elements （对比 MP7747DQ-LF-Z)
- Wide supply range for industrial and consumer audio rails （对比 MP7747DQ-LF-Z)
设计说明
Use a supply rail and decoupling network that meet the amplifier's 9.5 V to 36 V operating range and provide transient current for the selected speaker load. The verified 20 W condition is defined at VDD = 24 V into 4 ohms; do not treat that power rating as independent of supply voltage or speaker impedance. Place bulk and local ceramic decoupling near the IC power pins, and verify startup current, supply ripple, and cable-induced transients on the final board.
The exposed thermal pad is part of the power path and thermal solution. Provide a continuous ground-plane connection, multiple thermal vias where PCB rules permit, and sufficient copper area for the intended output level. The retrieved data does not provide theta_JA, maximum junction temperature, or a manufacturer PCB layout, so those values must be obtained from the official datasheet before assigning a thermal rating. Validate the hottest expected output condition rather than only idle or low-power operation.
Keep the Class D switching outputs and exposed-pad current loop compact and away from sensitive input and feedback traces. Route the output filter close to the amplifier and speaker connector, maintain short ground returns, and keep copper areas thermally and electrically consistent. Because the switching frequency can reach 1 MHz, PCB parasitics, filter component tolerances, and via inductance can affect EMI and audio behavior; test radiated emissions and speaker output with the final enclosure and cables.
合规信息
The retrieved verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-mineral status. The product is a commercial audio amplifier IC, but compliance must be confirmed from the manufacturer's current product documentation or supply-chain declaration.
