MP7745DF-LF-Z - 2x20W Class-D Stereo Amplifier | MPS
MPN: MP7745DF-LF-Z ✓ Hoạt độngMP7745DF-LF-Z Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MP7745DF-LF-Z — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MP7745DF-LF-Z (cùng hình factor và footprint) — khác nhau ở Output Power, Integrated Power MOSFET Resistance, Lead-Free Status, Channel Configuration, Operating Temperature.
MP7745DF-LF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MP7745DF-Z
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MP7745DF-LF-P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MP7742DF-LF-Z
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MP7722DF-LF-Z
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MP7745DF-LF-Z Tỷ lệ tối đa & tính chất điện
| Product Type | Stereo Class-D audio amplifier IC |
| Number of Channels | 2 channels |
| Cấu hình đầu ra | 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 |
| Nhiệt độ hoạt động | -40 °C to +85 °C |
| Maximum Power Dissipation | 3.1 W |
| Hộp | 20-pin TSSOPF-EP |
| Package Outline | TSSOP, MO-153ACT |
| Kiểu lắp đặt | Surface mount |
| RoHS Compliance | RoHS compliant |
| Lead-Free Status | Lead free |
| Evaluation Board | EV7745DF-01A |
Hướng dẫn cấu hình chân MP7745DF-LF-Z tssop, mo-153act
Cấu hình chân cho MP7745DF-LF-Z (tssop, mo-153act gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho MP7745DF-LF-Z.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MP7745DF-LF-Z phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MP7745DF-LF-Z — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Integrated 250 mΩ power MOSFET output stage (vsMP7722DF-LF-Z)
- Startup and shutdown pop elimination (vsMP7742DF-LF-Z)
- Single-ended stereo Class-D architecture (vsMP7742DF-LF-Z)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
