MP7747DQ-LF-Z - 20W Mono Class-D Audio Amplifier | MPS
料号： MP7747DQ-LF-Z ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.868 | $0.87 |
| 10 | $0.868 | $8.68 |
| 100 | $0.868 | $86.80 |
| 500 | $0.868 | $434.00 |
| 1,000 | $0.868 | $868.00 |
| 5,000 | $0.868 | $4,340.00 |
MP7747DQ-LF-Z 概述
A Class-D audio amplifier is a switching power amplifier that uses pulse-width-modulated output signals to drive a loudspeaker through a filtering network. Compared with a linear amplifier, the Class-D topology can provide higher efficiency and lower heat dissipation in portable or space-constrained equipment. The MP7747 integrates the power devices and protection functions into one package, reducing external component count and simplifying implementation compared with a discrete switching output stage.
The MP7747 is specifically positioned for mono audio reproduction, including portable speakers, compact consumer audio products, and small embedded audio systems. Its single-ended output architecture is intended to provide a straightforward connection to a speaker load after the required output filtering and decoupling. The verified product information does not provide the complete pin names, electrical limits, gain settings, or recommended PCB land pattern, so those details must be confirmed against the manufacturer datasheet before layout or firmware integration.
The integrated protection functions are important for portable equipment because they help manage startup behavior, shutdown behavior, overload conditions, and thermal stress. Pop elimination can reduce audible transients during startup or shutdown, while short-circuit protection helps protect the amplifier when the speaker connection is abnormal. These functions do not remove the need to observe the datasheet’s operating limits and speaker wiring requirements.
For layout, the MP7747 should be placed according to the manufacturer’s recommended land pattern and with short, low-inductance connections between the amplifier, input network, output filter, supply decoupling, and speaker load. Power and ground paths require particular care because switching audio amplifiers can produce high transient currents. The exact input capacitor, output filter, supply voltage, speaker impedance, and thermal limits are not included in the verified data and require datasheet confirmation.
This page combines the verified distributor and manufacturer descriptions for the MP7747DQ-LF-Z with practical selection guidance. It is intended to help engineers identify whether the part’s 20 W mono Class-D capability and integrated protection functions fit a target speaker system, while clearly separating verified information from parameters that still require confirmation from the manufacturer datasheet.
直接替换替代料： MP7747DQ-LF-Z ——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-Z （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：
该产品暂无直接替换替代料。
请求替代料MP7747DQ-LF-Z 最大额定值与电气特性
| Product Type | Mono Class-D audio amplifier |
| Channel Count | 1 channel |
| Maximum Output Power | 20 W |
| Speaker Load | 4 Ω |
| 输出配置 | Single-ended |
| Power MOSFET Resistance | 250 mΩ integrated power MOSFETs |
| Startup/Shutdown Feature | Startup/shutdown pop elimination |
| Short-Circuit Protection | Integrated short-circuit protection circuits |
| Thermal Protection | Thermal protection |
| 封装 | 10-QFN, 3 x 3 mm |
| 安装类型 | Surface mount |
| Device Class | Audio amplifier IC |
| Standard Order Quantity | 3003 pieces reported by one distributor listing |
MP7747DQ-LF-Z 10-qfn, 3 x 3 mm 引脚配置指南
MP7747DQ-LF-Z（10-qfn, 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-Z.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MP7747DQ-LF-Z 适用于 6 应用s: Compact Portable Speaker, Consumer Audio Product, Battery-Powered Audio Module, Industrial Control Annunciator, Smart Home Audio Node, USB or Portable Audio Accessory.
Compact Portable Speaker
The MP7747DQ-LF-Z fits a compact mono speaker system because the manufacturer identifies it as a 20 W Class-D amplifier capable of driving a 4 Ω speaker. Its integrated 250 mΩ power MOSFETs reduce the external output-device count, while startup/shutdown pop elimination helps suppress audible transitions. The design still needs the manufacturer-recommended output filter, supply decoupling, and speaker protection. Verify battery voltage range and thermal dissipation before selecting the amplifier for a battery-powered enclosure.
推荐
Consumer Audio Product
For a small consumer audio product, the MP7747DQ-LF-Z provides one-channel, single-ended Class-D output in a 10-QFN 3 x 3 mm package. The package helps preserve PCB area in products where the audio channel must coexist with control logic, connectivity, and a battery or USB supply. The integrated short-circuit and thermal protection support robust operation, but the amplifier still requires correct layout and the recommended speaker network. Confirm audio bandwidth and distortion requirements from the manufacturer datasheet.
推荐
Battery-Powered Audio Module
The MP7747DQ-LF-Z is a candidate for a battery-powered audio module when the target speaker is approximately 4 Ω and the power budget supports a 20 W Class-D output stage. Its integrated power MOSFETs can simplify the power topology compared with a discrete output implementation, while pop elimination helps control startup and shutdown transients. The critical design checks are supply-voltage compatibility, speaker continuous power, thermal rise, and output-filter component selection. These parameters are not fully specified in the verified snippets and require datasheet confirmation.
推荐
Industrial Control Annunciator
A mono Class-D stage such as the MP7747DQ-LF-Z can be evaluated for an industrial control annunciator or compact audible alarm where one speaker is sufficient and the enclosure is thermally constrained. The 20 W capability provides more headroom than many low-power alert drivers, while short-circuit and thermal protection are useful in a persistent audio-output path. The designer must account for industrial supply transients, EMI from the switching stage, speaker impedance, and acoustic limits. The verified data does not confirm an industrial temperature grade, so it should not be assumed.
推荐
Smart Home Audio Node
The MP7747DQ-LF-Z can serve as the speaker driver in a smart-home audio node where local voice or alert playback is required. Its 10-QFN 3 x 3 mm package is useful beside a wireless or embedded controller, and the single-ended mono output simplifies integration with a compact speaker. The switching amplifier requires careful grounding and decoupling to prevent unwanted coupling into nearby control or radio circuits. Confirm supply sequencing, EMI behavior, and thermal performance in the final enclosure using the manufacturer application information.
推荐
USB or Portable Audio Accessory
The MP7747DQ-LF-Z is suitable for evaluating in a USB-powered or battery-assisted audio accessory that drives one 4 Ω speaker. The integrated MOSFETs and protection circuits can reduce board area and improve robustness compared with a discrete Class-D output stage. However, a 20 W amplifier may exceed the practical power budget of a small USB source, so input supply limits, current transients, and thermal rise must be checked carefully. The verified sources confirm the 20 W and 4 Ω headline specifications but do not provide the required supply range.
推荐
工程参考数据： MP7747DQ-LF-Z ——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 |
|---|---|
| Device Type | Mono Class-D audio amplifier |
| Channel Count | 1 channel |
| Output Power | 20 W |
| Speaker Load | 4 Ω |
| Output Configuration | Single-ended |
| Power MOSFET Resistance | 250 mΩ integrated power MOSFETs |
| Protection | Short-circuit protection and thermal protection |
| Package | 10-QFN, 3 x 3 mm |
| Startup/Shutdown | Pop elimination |
| Brand | Monolithic Power Systems |
关键差异点
- Single-channel 20 W Class-D output （对比 No verified drop-in alternative available)
- Integrated power MOSFETs （对比 No verified drop-in alternative available)
- Protection and pop-control integration （对比 No verified drop-in alternative available)
- Compact surface-mount package （对比 No verified drop-in alternative available)
设计说明
Treat the MP7747DQ-LF-Z as a switching power stage: place supply decoupling and power-ground connections using the manufacturer’s recommended layout, and keep high-current output paths short and wide. The verified data confirms integrated 250 mΩ power MOSFETs but does not specify the supply-voltage range, so do not select the input rail or estimate current limits without consulting the official datasheet.
Use the official 10-QFN land pattern and verify pin numbering, exposed-pad connection, solder mask, and paste geometry before fabrication. The verified snippets identify a 10-QFN 3 x 3 mm package but do not provide a complete pin map. A pinout copied from a generic QFN drawing can cause input, output, supply, or ground misconnection.
Route the Class-D output and switching-current loop as compactly as practical, keep sensitive audio input traces away from power nodes, and provide a clean return path for the output filter. Place the filter and speaker connections according to the manufacturer reference design. EMI testing is essential because the MP7747’s switching output can couple into adjacent control, radio, or analog circuitry.
Do not connect the speaker directly to an unfiltered Class-D switching output, and do not assume the headline 20 W rating applies to every 4 Ω speaker. Confirm the speaker’s continuous power, impedance, required output-filter values, supply limits, thermal conditions, and startup behavior in the manufacturer datasheet before releasing a production design.
合规信息
The verified snippets do not provide authoritative compliance statements. One distributor listing requests inventory verification and does not establish RoHS status, so compliance remains unknown.
