MP7745DF-LF-Z - 2x20W Class-D Stereo Amplifier | MPS
N.º da peça: MP7745DF-LF-Z ✓ Ativo| Qtd. | Preço unitário | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
MP7745DF-LF-Z Visão geral
A Class-D audio amplifier is a switching power amplifier that uses PWM-related transistor operation to deliver audio energy efficiently compared with a conventional linear amplifier. The MP7745 belongs to the hierarchy Class-D amplifier → audio amplifier → analog power amplifier → power-management semiconductor. This category is especially useful for portable speakers, compact consumer audio equipment, and other systems where speaker output power and board area are important.
Key features include 2 × 20 W stereo output, a 9.5 V to 26 V supply range, integrated 250 mΩ power MOSFETs, single-ended outputs, short-circuit protection, and startup/shutdown pop elimination. The MP7745 is intended for surface-mount designs using its exposed-pad TSSOP package. The verified distributor listing describes the MP7745DF-LF-Z as a lead-free, RoHS-compliant amplifier in a 20-TSSOPF-EP package.
The MP7745’s integrated output stage simplifies the power layout, but the exposed pad still requires careful thermal design. The LC output-filter network is critical because Class-D outputs contain high-frequency switching energy. Inductor selection, capacitor placement, speaker wiring, and return-current paths should follow the manufacturer’s recommended application circuit. The evaluation board EV7745DF-01A provides a manufacturer-supported reference for evaluating the MP7745 in a stereo speaker amplifier design.
Typical uses include portable Bluetooth speakers, compact stereo speakers, multimedia speaker systems, small audio consoles, and consumer products requiring two amplified speaker channels. The 2 × 20 W capability makes the part appropriate for low-impedance speakers when the supply and thermal limits are respected. Compared with a discrete Class-D design, integrated MOSFETs can reduce component count and simplify assembly, although thermal performance still depends on PCB copper area, load impedance, output waveform, and ambient temperature.
For a new design, use the MP7745DF-LF-Z when a compact, integrated stereo Class-D solution is preferred over a discrete output stage. Verify the exact pinout, recommended LC filter, input coupling, supply decoupling, and exposed-pad land pattern against the manufacturer datasheet. This page combines the verified specifications, source links, application guidance, and drop-in comparison framework needed for engineering evaluation.
Alternativas drop-in para MP7745DF-LF-Z — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MP7745DF-LF-Z (mesmo formato e footprint) — diferindo em Integrated Power MOSFET Resistance, Lead-Free Status, Operating Temperature, Output Power, Product Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasMP7745DF-LF-Z Classificações máximas e características elétricas
| Product Type | Stereo Class-D audio amplifier IC |
| Number of Channels | 2 channels |
| Configuração de saída | Single-ended stereo |
| Output Power | 20 W per channel into 4 Ω |
| Supply Voltage Range | 9.5 V to 26 V |
| Integrated Power MOSFET Resistance | 250 mΩ |
| Protection | Short-circuit protection |
| Startup Feature | Startup pop elimination |
| Shutdown Feature | Shutdown pop elimination |
| Temperatura de operação | -40 °C to +85 °C |
| Maximum Power Dissipation | 3.1 W |
| Encapsulamento | 20-pin TSSOPF-EP |
| Package Outline | TSSOP, MO-153ACT |
| Tipo de montagem | Surface mount |
| RoHS Compliance | RoHS compliant |
| Lead-Free Status | Lead free |
| Evaluation Board | EV7745DF-01A |
Guia de Configuração de Pinos do MP7745DF-LF-Z tssop, mo-153act
Configuração de pinos para MP7745DF-LF-Z (pacote tssop, mo-153act). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para MP7745DF-LF-Z.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MP7745DF-LF-Z é adequado para 6 aplicaçãos: Portable Bluetooth Speaker, Compact Stereo Speaker, Multimedia Speaker System, Consumer Audio Console, USB Audio Speaker, Industrial Audio Notification Unit.
Portable Bluetooth Speaker
The MP7745DF-LF-Z fits a compact stereo Bluetooth speaker that needs 20 W per channel into 4 Ω speakers. Its integrated 250 mΩ MOSFETs reduce the number of external output-power components, while startup and shutdown pop elimination helps control audible transitions. The designer should place the input, supply, and output-filter components according to the manufacturer application circuit, preserve the exposed-pad thermal connection, and verify battery or adapter voltage across the 9.5 V to 26 V supply range.
Recomendado
Compact Stereo Speaker
The MP7745DF-LF-Z provides two amplified channels for compact stereo speaker systems where each channel targets 20 W into 4 Ω. Its single-ended Class-D output architecture can simplify system integration compared with a discrete MOSFET output stage. The key engineering constraint is the LC output filter: its inductance and capacitance must be selected according to the manufacturer’s switching-frequency and load recommendations. Thermal performance should be validated with the actual speaker enclosure, because copper area and ambient temperature affect the exposed-pad junction temperature.
Recomendado
Multimedia Speaker System
The MP7745DF-LF-Z is suitable for a multimedia speaker system requiring independent left and right amplified outputs from a regulated supply. Its 2 × 20 W stereo specification allows a compact implementation for desktop or home-theater accessories, while short-circuit protection adds resilience in consumer audio equipment. The system designer should keep analog input routing away from switching-node and output-filter currents, provide local supply decoupling, and use the EV7745DF-01A evaluation board as a reference for startup, shutdown, filtering, and exposed-pad layout.
Recomendado
Consumer Audio Console
The MP7745DF-LF-Z can serve as the stereo speaker driver in a small consumer audio console, provided the supply and speaker impedance match its verified 9.5 V to 26 V and 4 Ω operating targets. The integrated output MOSFETs reduce assembly count, and the pop-elimination functions improve mute and power-control behavior. Designers should avoid placing high-current speaker returns near sensitive audio inputs, verify filter stability across the full audio band, and calculate thermal margin using the worst-case continuous-output condition rather than only the nominal 20 W rating.
Recomendado
USB Audio Speaker
The MP7745DF-LF-Z is appropriate for a USB audio speaker when a digital audio source is followed by a stereo DAC or codec and a low-impedance speaker load. The amplifier’s two-channel output supports conventional left/right routing, while its short-circuit protection helps protect the output stage during cable or load faults. Power-supply design should prevent switching ripple from entering the audio input path, and the output LC filter must be placed according to the MP7745 reference layout to limit radio-frequency and EMI radiation.
Recomendado
Industrial Audio Notification Unit
The MP7745DF-LF-Z can be used in industrial audio notification equipment when two speaker channels, short-circuit protection, and a compact surface-mount implementation are useful. Its -40 °C to +85 °C operating range covers many industrial environments, but the final design must verify enclosure temperature, supply tolerance, and speaker impedance under worst-case conditions. A robust implementation should include input protection, controlled shutdown sequencing, filter layout that limits EMI, and sufficient exposed-pad copper to keep junction temperature below the manufacturer’s limits.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MP7745DF-LF-Z — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MP7745DF-LF | MP7745DF-Z | MP7745DF-LF-P | MP7742DF-LF-Z | MP7722DF-LF-Z |
|---|---|---|---|---|---|---|
| Package | 20-pin TSSOPF-EP | 20-pin TSSOPF-EP | 20-pin TSSOPF-EP | 20-pin TSSOPF-EP | 20-pin TSSOPF-EP | 20-pin TSSOPF-EP |
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| Channel Count | 2 | 2 | 2 | 2 | 2 | 2 |
Principais diferenciais
- Integrated 250 mΩ power MOSFET output stage (vs MP7722DF-LF-Z)
- Startup and shutdown pop elimination (vs MP7742DF-LF-Z)
- Single-ended stereo Class-D architecture (vs MP7742DF-LF-Z)
Notas de projeto
Use the manufacturer’s exposed-pad land pattern and connect the thermal pad to the ground plane with the recommended copper and via arrangement. The verified package is TSSOPF-EP rather than a generic TSSOP, so the pad geometry and paste design must be matched. Keep the exposed-pad thermal path free of accidental plane splits and validate the board with the actual amplifier enclosure and speaker-load conditions.
Place local input and output decoupling close to the relevant MP7745 pins, and route high-current supply and speaker-return paths so switching current does not share sensitive audio input traces. The verified supply range is 9.5 V to 26 V; confirm regulator tolerance, startup current, and load transients. A supply that is quiet at idle can still introduce audible or RF interference if its dynamic impedance is inadequate.
Do not treat MP7722DF-LF-Z, MP7742DF-LF-Z, or a generic Class-D amplifier as a drop-in replacement without comparing pin functions and electrical limits. The verified search identifies related MPS parts and comparison pages, but it does not establish complete pin compatibility. Confirm output topology, supply range, gain, filter requirements, exposed-pad geometry, and thermal limits against both manufacturer datasheets before changing a PCB.
Class-D switching outputs require careful LC filtering and layout. Keep the switching node compact, route speaker outputs away from analog inputs, and use the manufacturer’s recommended output-filter values and placement. An incorrectly selected filter can increase audible distortion, EMI radiation, or speaker resonances even when the amplifier’s 20 W output rating is satisfied. Evaluate the finished assembly with the speaker cable and enclosure attached.
Informações de conformidade
The verified distributor data identifies MP7745DF-LF-Z as RoHS compliant and lead free. No verified information was supplied for REACH, halogen-free status, conflict-minerals compliance, or AEC-Q100 qualification.
