MP1720DQ-216-LF-Z - 2.7W Mono Class-D Amplifier | MPS
MPN: MP1720DQ-216-LF-Z ✓ ActiveMP1720DQ-216-LF-Z Overview
A Class-D audio amplifier is a switching power amplifier whose output MOSFETs rapidly alternate between fully enhanced and off states. This approach reduces output-stage dissipation compared with a linear Class-AB amplifier. The MP1720 belongs to the broader audio amplifier IC, analog amplifier, signal-conditioning IC, and power management semiconductor hierarchies. It is intended for compact speaker systems operating from low-voltage supplies.
Key features include 2.7 W output into a 4 ohm speaker, up to 90% efficiency, integrated 250 milliohm power MOSFETs when operated from a 3.3 V supply, and a 20 kHz bandwidth. Startup and shutdown pop elimination, short-circuit protection, and thermal protection are integrated. These protections and features are intended to simplify portable audio designs while preserving a small package footprint.
The MP1720's full-bridge topology produces a differential output across the speaker terminals. This architecture allows efficient delivery to a 4 ohm load without requiring a conventional Class-AB output stage. The specified 2.5 V to 5.5 V operating range supports supply systems built around lithium-cell, portable-device, and low-voltage USB-related rails, although system-level compatibility must include inrush, peak-current, and USB source-current requirements.
Typical uses include compact Bluetooth speakers, portable speakers, soundbars, consumer audio accessories, voice-assistant speakers, and other low-voltage audio products. The 3 mm by 3 mm QFN package is particularly useful where PCB area is constrained, while its exposed pad requires careful thermal design and PCB-layout attention.
Designers should place the input, supply, output, and decoupling components as close as practical to the device, verify the speaker impedance and power requirements, and provide adequate thermal coupling through the exposed pad. A Class-D amplifier does not reproduce DC, and correct input grounding and output filtering remain essential for low-noise operation. The available source data does not provide a complete verified pin map, so the package pinout is not asserted here.
This page consolidates the verified manufacturer and distributor information, distinguishes confirmed specifications from unavailable parameters, and provides practical application and design guidance beyond the basic ordering data. Pricing, lead time, detailed pin mapping, and verified drop-in substitutes remain subject to current distributor confirmation.
Drop-in alternatives for MP1720DQ-216-LF-Z — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MP1720DQ-216-LF-Z (same form factor and footprint) — differing in Efficiency, Mounting Type, Output Configuration, Package, Packaging.
No drop-in alternatives available for this product.
Request AlternativesMP1720DQ-216-LF-Z Maximum Ratings & Electrical Characteristics
| Product Type | Mono Class-D audio amplifier |
| Output Configuration | 1-channel mono, full-bridge output |
| Maximum Output Power | 2.7 W into 4 ohm |
| Distributor-Reported Output Power | 2.78 W into 4 ohm |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Efficiency | Up to 90% |
| Bandwidth | 0.0200 MHz (20 kHz) |
| Integrated Output MOSFET Resistance | 250 milliohm at 3.3 V |
| Operating Temperature | -40 C to +85 C |
| Package | 10-QFN, 3 mm x 3 mm, exposed pad |
| Mounting Type | Surface-mount SMD |
| Protection Features | Startup/shutdown pop elimination, short-circuit protection, thermal protection |
| Output Architecture | Full-bridge |
| Audio Fidelity | Class-AB-like fidelity |
| Packaging | Reel |
| Lifecycle Status | Active |
MP1720DQ-216-LF-Z 10-qfn, 3 mm x 3 mm, exposed pad Pin Configuration Guide
Pin configuration for MP1720DQ-216-LF-Z (10-qfn, 3 mm x 3 mm, exposed pad package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MP1720DQ-216-LF-Z.
Refer to the datasheet for full pin configuration.
Typical Applications
MP1720DQ-216-LF-Z is suitable for 6 applications: Portable Bluetooth Speaker, Voice-Assistant Speaker, Compact Soundbar Speaker, Consumer Audio Accessory, Low-Voltage IoT Audio Node, Battery-Powered Personal Audio Device.
Portable Bluetooth Speaker
The MP1720DQ-216-LF-Z fits compact Bluetooth speakers requiring a mono 4 ohm speaker stage from a low-voltage supply. Its full-bridge Class-D topology delivers up to 2.7 W while providing up to 90% efficiency, reducing heat and supporting a compact 3 mm by 3 mm footprint. The designer should place local supply and ground connections close to the QFN, use the exposed pad as the thermal path, and verify that the battery or USB source can support switching and peak output current. Pop elimination during startup and shutdown further supports use in portable audio products.
Voice-Assistant Speaker
The MP1720DQ-216-LF-Z is appropriate for the small speaker driver in a voice-assistant enclosure when the audio subsystem requires efficient mono Class-D output. Its 2.5 V to 5.5 V supply range accommodates common low-voltage systems, and the stated 2.7 W into 4 ohm capability is suitable for a compact driver. The low-EMI-oriented amplifier implementation should still be evaluated with the complete digital audio subsystem, microphone circuitry, switching supply, and enclosure. Layout must prioritize clean ground return, stable supply bypassing, and unobstructed thermal coupling beneath the exposed pad.
Compact Soundbar Speaker
A compact soundbar can use the MP1720DQ-216-LF-Z as a mono Class-D output stage where each driver requires approximately 2.7 W into 4 ohms. The amplifier's full-bridge output avoids a conventional Class-AB output stage and offers up to 90% efficiency, making it useful in space-constrained multi-driver products. Actual continuous output depends on the supply voltage and PCB thermal design, so a system requiring more power should use a higher-output device. Input filtering, differential speaker routing, EMI control, and exposed-pad heat spreading should be validated in the production layout.
Consumer Audio Accessory
The MP1720DQ-216-LF-Z suits compact consumer audio accessories that add a small speaker output to a low-voltage digital system. Its single-channel Class-D topology, 2.5 V to 5.5 V operating range, and 2.7 W 4 ohm output capability simplify portable products requiring more useful acoustic power than a Class-D headphone stage can provide. The integrated short-circuit and thermal protections improve robustness, but the designer must confirm speaker impedance, startup behavior, supply headroom, acoustic limits, and the thermal performance of the specific PCB.
Low-Voltage IoT Audio Node
The MP1720DQ-216-LF-Z can provide local audible feedback in a low-voltage IoT node, such as a smart-home controller or connected sensor with a compact speaker. The 2.7 W mono output is suitable for short-duration prompts or low-volume local playback, while up to 90% efficiency helps limit power loss in battery-powered equipment. Protection functions support dependable operation, although average audio power must remain within the available supply and thermal budget. EMI behavior should be checked in the complete IoT product because switching regulators, radios, and digital processors can couple noise into the analog input.
Battery-Powered Personal Audio Device
The MP1720DQ-216-LF-Z is applicable to a battery-powered personal audio device that includes a small 4 ohm speaker and operates from a 2.5 V to 5.5 V rail. The Class-D architecture delivers up to 2.7 W at up to 90% efficiency, helping conserve battery energy compared with a less efficient linear output stage. Pop elimination reduces startup and shutdown transients, while short-circuit and thermal protection add system robustness. Designers should model average speaker power, verify battery pulse capability, and route output filtering and supply components according to the official reference layout.
Engineering reference data for MP1720DQ-216-LF-Z — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 10-QFN, 3 mm x 3 mm, exposed pad |
| Brand | Monolithic Power Systems |
| Output Configuration | Mono, 1 channel |
| Amplifier Class | Class D |
| Maximum Output Power | 2.7 W into 4 ohm |
| Supply Voltage | 2.5 V to 5.5 V |
| Efficiency | Up to 90% |
| Bandwidth | 0.0200 MHz (20 kHz) |
| Output Architecture | Full-bridge BTL |
| Protection | Pop elimination, short-circuit protection, thermal protection |
| Operating Temperature | -40 C to +85 C |
Key Differentiators
- Compact high-efficiency mono Class-D output (vs No verified drop-in alternative was identified)
- Integrated speaker-drive protection (vs No verified drop-in alternative was identified)
- Low-voltage portable-system compatibility (vs No verified drop-in alternative was identified)
Design Notes
Use the exposed pad as the principal thermal path by connecting it to ground and providing uninterrupted PCB copper on as many layers as practical. Place the amplifier near the output components and avoid trapping heat between the package and an enclosure wall. The available source data does not provide a verified junction-to-ambient thermal-resistance value, so a numerical junction-temperature estimate cannot be made without board construction, ambient temperature, and dissipation details.
Follow the manufacturer's recommended layout for the MP1720, placing input components, supply bypass capacitors, output components, and the exposed-pad connection close to the device. Keep the full-bridge output paths compact and symmetrical, maintain a low-impedance ground return, and avoid routing sensitive audio input traces beneath or parallel to switching-output paths. Exact capacitor values and PCB dimensions were not present in the supplied excerpts and should be taken from the official datasheet and reference layout.
Treat the MP1720 output stage and power-supply return as potential EMI sources. Keep input and ground routing away from the differential output nodes, use compact supply loops, and validate conducted and radiated emissions with the speaker cable, enclosure, power source, and audio source connected. Although the family is described as a low-EMI Class-D amplifier, system-level emissions still depend on board geometry, filtering, grounding, and cable construction.
Compliance Information
The supplied verified excerpts identify the MP1720 as active but do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than being inferred from generic distributor terminology.
