MP7782DF-LF-Z - 50W Mono Class-D Amplifier | MPS
MPN： MP7782DF-LF-Z ✓ 啟用中MP7782DF-LF-Z 概覽
A Class-D audio amplifier is a switching power amplifier that uses transistor output stages to deliver audio energy with relatively low internal power loss. The MP7782DF-LF-Z belongs to the amplifier IC hierarchy: Class-D amplifier, audio amplifier IC, analog signal-processing IC, and power-management semiconductor. Its bridged mono configuration is suited to powered speakers, portable audio equipment, soundbars, compact consumer systems, and industrial audio products where one speaker is driven from two amplifier outputs.
The headline electrical ratings are a 50 W maximum output power, a 9.5 V to 24 V supply-voltage range, and a monobridge Class-D output topology. Its 20-TSSOP exposed-pad package supports compact PCB layouts while providing a designated thermal-coupling area. The -40 °C to +85 °C operating-temperature range supports both consumer and extended-temperature industrial environments when the complete system is designed for the applicable environmental limits.
The MP7782DF family is described by Monolithic Power Systems as a second-generation, fully integrated audio-amplifier solution intended to reduce solution size. In a bridged output arrangement, the two power-output nodes drive a speaker differentially, increasing usable output voltage into the load compared with a conventional single-ended output. The exposed thermal pad should be connected to the PCB ground plane according to the manufacturer layout guidance.
Typical uses include compact speaker enclosures, portable or battery-powered audio products, multimedia speaker systems, USB or desktop audio amplification, soundbar subwoofer sections, and industrial notification or intercom equipment. System designers must account for speaker impedance, supply capability, output filtering, thermal performance, and EMI generated by the Class-D output stage.
The main design consideration is power delivery and heat management. A 50 W device rating does not guarantee 50 W continuous output at every supply voltage, speaker impedance, or ambient temperature. Validate the operating point against the manufacturer data, use an adequately sized supply, and provide generous exposed-pad copper and thermal vias. High-current speaker traces also require short, wide routing to reduce voltage loss and EMI radiation.
This product data combines verified distributor specifications, a 50 W application-oriented overview, sourcing guidance, and design-focused comparisons. It distinguishes documented ratings from unavailable detailed pin, electrical-limit, and alternative-part data so engineers can distinguish verified facts from items that still require confirmation in the manufacturer datasheet.
直接替換替代品，適用於 MP7782DF-LF-Z — 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。
此產品無可直接替換的替代品。
申請替代品MP7782DF-LF-Z 最大額定值與電氣特性
| Product Type | Mono bridged Class-D audio amplifier IC |
| Channel Count | 1 channel (mono) |
| Maximum Output Power | 50 W |
| Supply Voltage Range | 9.5 V to 24 V |
| 工作溫度範圍 | -40 °C to +85 °C |
| 輸出配置 | Bridged Class-D |
| 封裝 | 20-pin TSSOP with exposed pad |
| Package Dimensions | 4.4 mm nominal body width; 0.173 mm lead pitch |
| 安裝類型 | Surface mount |
| Termination | Lead-free |
| RoHS 狀態 | RoHS compliant |
| Amplifier Family | Second-generation fully integrated MPS audio amplifier |
| Supplier Availability Signal | Listed as in stock by at least one verified distributor |
MP7782DF-LF-Z 4.4 mm nominal body width; 0.173 mm lead pitch 腳位配置指南
MP7782DF-LF-Z（4.4 mm nominal body width; 0.173 mm lead pitch 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： MP7782DF-LF-Z.
請參閱 資料表 以查看完整腳位配置。
典型應用
MP7782DF-LF-Z 適用於 6 應用s: Compact Powered Subwoofer, Portable Speaker, Desktop Audio Amplifier, Soundbar Speaker Section, Industrial Notification Speaker, USB-Accessible Audio Module.
Compact Powered Subwoofer
The MP7782DF-LF-Z fits a compact subwoofer amplifier because it combines a 50 W mono bridged output rating with a 9.5 V to 24 V supply range. The bridged Class-D topology can drive a speaker differentially and reduce the external amplification stage to one integrated IC. Place the device near the output filter and speaker connector, use short high-current traces, and connect the exposed pad to a substantial ground and thermal-copper region. Because the 50 W figure has specific operating conditions, engineers should verify the available supply power, speaker impedance, and continuous thermal load in the manufacturer datasheet before finalizing the enclosure and transformer or buck-converter selection.
Portable Speaker
The MP7782DF-LF-Z is appropriate for a portable single-speaker system that accepts a 9.5 V to 24 V source. Its integrated mono Class-D architecture reduces the number of external amplification components and supports a compact board layout. Battery-derived systems should use a regulated rail that remains within the verified supply range and provides the transient current needed at the selected speaker impedance. Thermal design remains important because the exposed pad must transfer heat into the PCB rather than allowing it to accumulate inside a sealed enclosure. Input filtering, output inductors or capacitors where required, and speaker wiring should follow the manufacturer reference layout to minimize audible noise and EMI.
Desktop Audio Amplifier
A desktop speaker amplifier can use the MP7782DF-LF-Z for one high-power mono channel when a 50 W Class-D output and a 20-pin TSSOP implementation are useful. The integrated amplifier simplifies the analog drive path and can help reduce board area compared with a discrete output stage. The MP7782DF-LF-Z should be powered from a clean 9.5 V to 24 V rail, while the signal path must preserve the amplifier’s input requirements and avoid introducing ground noise. Route the switching outputs as short and wide as practical, filter them according to the reference design, and provide copper beneath the exposed pad so the device can dissipate heat without creating thermal shutdown issues.
Soundbar Speaker Section
The MP7782DF-LF-Z can serve a soundbar’s dedicated woofer or full-range speaker section when the design requires up to the verified 50 W family rating and a compact mono output stage. Its 20-pin TSSOP exposed-pad package allows placement within a densely populated audio board, while the -40 °C to +85 °C range covers many indoor enclosure conditions. The integration reduces the number of discrete output transistors, but Class-D edge currents still require controlled PCB routing and filtering. Designers should verify whether the 50 W rating is achievable continuously at the intended supply voltage and speaker impedance and should reserve copper area for heat spreading without compromising EMI separation from sensitive input and control circuitry.
Industrial Notification Speaker
The MP7782DF-LF-Z can drive an industrial notification or alarm speaker from a 24 V nominal system when the design includes regulation to remain below the 24 V maximum supply rating. Its 50 W mono bridged Class-D output can provide useful acoustic power from one IC, while the -40 °C to +85 °C operating range supports extended-temperature equipment. Industrial enclosure conditions may still require system-level thermal and EMC qualification. Use an input arrangement that rejects unwanted noise, protect the amplifier from supply transients, and follow the manufacturer’s output-filter and exposed-pad guidance. The final design should be tested for acoustic distortion, thermal stability, conducted emissions, and radiated emissions at the actual cable lengths and speaker impedance.
USB-Accessible Audio Module
The MP7782DF-LF-Z is suitable for a powered audio module that converts a low-level audio signal into a mono speaker output. Its integrated Class-D stage can reduce the external component count compared with a discrete amplifier, while the 9.5 V minimum input voltage requires an appropriate local supply rather than a direct 5 V source. Power-system design must provide the current required by the speaker and avoid audio-modulating regulator ripple. Keep sensitive input routing away from high-current output paths, provide local bypass capacitance according to the reference design, and test for conducted noise from the USB and power domains. The exposed-pad copper and thermal vias are essential for reliable operation at elevated output power.
工程參考資料，適用於 MP7782DF-LF-Z — 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 |
|---|---|
| Product Type | Mono bridged Class-D audio amplifier IC |
| Brand | Monolithic Power Systems |
| Package | 20-pin TSSOP with exposed pad |
| Maximum Output Power | 50 W |
| Supply Voltage Range | 9.5 V to 24 V |
| Channel Count | 1 channel (mono) |
| Output Configuration | Bridged Class-D |
| Operating Temperature Range | -40 °C to +85 °C |
| RoHS Status | RoHS compliant |
| Lead-Free Status | Lead-free |
主要差異化特點
- Integrated high-power mono output (對比MP7782DF-LF-P)
- Single-device speaker amplification (對比MP7731DF-LF-Z)
- Compact exposed-pad implementation (對比Discrete Class-D output stage)
設計說明
Treat the exposed pad as both the electrical ground connection and the principal thermal path. Follow the manufacturer PCB layout and connect it to the ground plane with multiple thermal vias where permitted. The verified data supplies a 50 W device rating but no detailed thermal-resistance value or continuous-power derating table, so calculate the worst-case copper, via, enclosure, ambient-temperature, and output-power conditions before production release.
Keep Class-D output current loops compact and route the speaker outputs with short, wide traces. High di/dt currents can produce EMI and voltage loss even when the audio output is acceptable. Maintain separation between sensitive input traces and switching-output paths, place the required input and output filtering close to the device, and use the manufacturer reference layout as the baseline. Do not improvise exposed-pad connections without checking the pin table and layout guidance.
Design the supply for the 9.5 V to 24 V operating range and for the current demanded at the intended impedance and output power. A nominal 24 V rail requires transient and regulation margin so overshoot cannot exceed the verified maximum. Local bypass capacitors should follow the manufacturer requirements, and the input supply path should not introduce audible modulation or excessive ripple into the audio output.
Do not interpret the 50 W family rating as an unconditional continuous-output promise. Confirm the test conditions, speaker impedance, supply voltage, and thermal limits in the manufacturer datasheet. Also verify the exact order-code suffix, exposed-pad construction, pinout, and output-filter requirements before substituting a related MP7782DF ordering code.
合規資訊
The verified MP7782DF-LF records identify the device as RoHS compliant and lead-free. No verified REACH, halogen-free, conflict-minerals, or automotive-qualification statement was supplied. AEC-Q100 is not applicable because the verified data does not identify an automotive-qualified variant.
