MP7748DF-LF-Z - 50W Class-D Audio Amplifier | MPS
料号： MP7748DF-LF-Z ✗ 停产| 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 |
MP7748DF-LF-Z 概述
A Class-D audio amplifier is a switching amplifier that uses pulse-width modulation to deliver speaker power efficiently while reproducing the Class A/B-like audio fidelity described by the manufacturer. The MP7748 belongs to the audio-amplifier, analog-output, power-management-IC, and semiconductor hierarchies. Its switching output stage reduces dissipation compared with a linear amplifier, while integrated protection and control circuitry simplify portable and compact audio designs.
Verified performance features include 20W per channel into 4Ω in stereo single-ended mode, 50W into 6Ω in mono bridge-tied-load mode at 24V VDD, and THD+N of 1% at 1W into an 8Ω load in single-ended configuration. The datasheet snippet reports 103µV noise in single-ended configuration. Integrated features include startup and shutdown pop elimination, short-circuit protection, and 4.5A short-circuit current limiting, with automatic restart after the fault clears.
The amplifier supports either two stereo single-ended outputs or one mono bridge-tied-load output. This flexibility permits the same device family to address stereo speakers, compact subwoofers, multimedia speakers, consumer audio equipment, and powered portable equipment. At 24V VDD, its available output-power capability is substantially higher than devices rated only for low-voltage portable applications.
Output topology is the principal design consideration. Single-ended mode drives each speaker terminal relative to ground, whereas bridge-tied-load mode uses both output channels so the speaker sees the differential voltage. The latter increases available voltage swing and supports the 50W mono result, but it must not be used with a speaker connected from either output to ground. Verify pin functions, exposed-pad layout, decoupling, thermal performance, and output topology against the manufacturer datasheet before layout release.
This product page consolidates verified manufacturer specifications, distributor listing data, package information, and practical selection guidance. Pricing, detailed electrical limits, full pin naming, compliance declarations, and lifecycle status remain dependent on current authorized-source data because those values were not established by the supplied search extract.
MP7748DF-LF-Z 最大额定值与电气特性
| Product Type | Class-D audio amplifier IC |
| Channel Configuration | 2-channel stereo or 1-channel mono BTL |
| Stereo Single-Ended Output Power | 20W per channel into 4Ω at 24V VDD and 10% THD+N |
| Mono Bridge-Tied-Load Output Power | 50W into 6Ω at 24V VDD |
| Total Distortion Plus Noise | 1% at 1W into 8Ω in SE configuration |
| 输出噪声 | 103µV in SE configuration |
| Supply Voltage for Stated Power | 24V VDD |
| Integrated Power-MOSFET Resistance | 250mΩ |
| Short-Circuit Current Limit | 4.5A |
| Protection | Short-circuit protection with automatic restart |
| Startup Control | Startup and shutdown pop elimination |
| 封装 | 28-pin TSSOP-EP |
| 安装类型 | Surface mount |
| 输出配置 | Stereo single-ended or mono bridge-tied-load |
MP7748DF-LF-Z 28-pin tssop-ep 引脚配置指南
MP7748DF-LF-Z（28-pin tssop-ep 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： MP7748DF-LF-Z.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MP7748DF-LF-Z 适用于 6 应用s: Stereo Powered Speakers, Compact Mono Subwoofer, Multimedia Speaker Amplifier, Portable Powered Speaker, Consumer Audio Amplifier Module, Powered Speaker Monitor.
Stereo Powered Speakers
The MP7748DF-LF-Z fits stereo speaker platforms requiring 20W per channel into 4Ω from a 24V supply. Configure both channels as single-ended outputs and connect each speaker terminal to the corresponding channel and ground. This provides a compact alternative to a discrete output stage while retaining integrated 250mΩ power MOSFETs. Validate sustained output power, copper heat spreading, exposed-pad soldering, supply decoupling, and enclosure temperature because the 20W figure is specified at 10% THD+N rather than at a lower distortion target.
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Compact Mono Subwoofer
For a compact powered subwoofer, the MP7748DF-LF-Z can use bridge-tied-load mode to deliver 50W into 6Ω at 24V VDD. The speaker must connect across the two amplifier outputs, not from either output to ground, because each channel switches around ground. The higher effective output voltage is useful for low-impedance drivers, but the design must account for short-circuit protection, the 4.5A current threshold, EMI from high-current switching paths, and thermal loss. Confirm the driver impedance and power handling before finalizing the output network.
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Multimedia Speaker Amplifier
The MP7748DF-LF-Z can provide efficient, integrated drive for multimedia speakers where a 24V rail is available and higher output power than typical portable audio chips is useful. Its two-channel architecture supports left and right speakers in single-ended mode, while integrated pop suppression helps reduce audible startup or shutdown transients. Board design should keep the exposed pad thermally coupled to a suitable copper plane, use short high-current output routes, and provide the input, supply, and bypass capacitors specified by the manufacturer datasheet.
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Portable Powered Speaker
A battery-derived powered speaker can use the MP7748DF-LF-Z when its power stage is supplied from a regulated 24V rail and the system can manage the additional heat and switching requirements. Compared with a low-voltage portable amplifier, the MP7748 supports substantially more load power but requires careful conversion efficiency, current-limit behavior, and thermal design. The integrated 4.5A short-circuit protection reduces fault stress, yet system safeguards still need to cover supply faults, reversed battery conditions, and sustained thermal load.
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Consumer Audio Amplifier Module
The MP7748DF-LF-Z is appropriate for a compact consumer audio module requiring two 20W outputs from a 24V supply. Its integrated power MOSFETs reduce board area, while single-ended stereo operation simplifies the speaker wiring compared with bridge-tied-load use. The module designer should still reserve adequate copper for heat removal, isolate the analog input path from switching outputs, and use the exposed-pad land pattern specified by MPS. Validate EMI and enclosure acoustics at the maximum intended output level.
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Powered Speaker Monitor
The MP7748DF-LF-Z can drive a compact stereo monitor from a 24V supply when 20W per channel is sufficient. The measured output-noise specification of 103µV in single-ended configuration is relevant to low-level listening performance, although the full frequency-weighted noise and distortion data must be taken from the manufacturer datasheet. Place input and ground connections away from the high-current outputs, maintain the specified supply bypass network, and verify stability, EMI behavior, and thermal rise inside the monitor enclosure.
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推荐产品汇总
工程参考数据： MP7748DF-LF-Z ——对比、设计指导和合规信息。
选型指南
设计说明
Treat the exposed pad as both a thermal path and package connection defined by the manufacturer land pattern. Estimated: at 20W output and an assumed amplifier efficiency of 90%, internal dissipation would be approximately 2.22W before other circuit losses. With a copper area and thermal arrangement that does not yet have a verified junction-to-ambient resistance, no defensible temperature rise can be calculated; use the datasheet thermal model and measure the assembled board in its enclosure.
Keep the 24V supply, output, and ground paths compact and use the manufacturer-prescribed input, bypass, and bootstrap or modulation-network connections. Route sensitive audio inputs away from switching nodes, place decoupling at the pins, and provide uninterrupted ground return beneath the power stage. Incorrectly following the exposed-pad pattern can increase ESR, reduce heat transfer, or disrupt the intended power return.
Do not connect a speaker to ground when the amplifier operates in bridge-tied-load mode. BTL places both output terminals at switching potentials relative to ground, and a ground connection can short an output or damage the device. Confirm the mode with the pin definitions and truth conditions in the MP7748 datasheet, and perform continuity testing before attaching a powered speaker.
Size the supply for continuous Class-D output current and startup behavior rather than selecting it only from target watts into the nominal speaker impedance. The verified data identifies a 4.5A short-circuit threshold, but does not provide the full current-limit, undervoltage, or thermal window in the supplied extract. Use the complete electrical characteristics and application circuit to set supply current, decoupling, protection, and copper widths.
合规信息
No exact-MPN compliance declarations were present in the supplied verified records. Automotive qualification is not inferred from the product category.
