MP1720DH-12-LF-P - 2.7W Class-D Mono Amplifier | MPS
MPN: MP1720DH-12-LF-P ✓ ActiveMP1720DH-12-LF-P Overview
A Class-D audio amplifier is a switching power amplifier that converts a low-power analog input into a differential speaker drive. The MP1720 belongs to the Class-D amplifier hierarchy, where efficiency and low electromagnetic interference are priorities for portable consumer audio. Its full-bridge topology eliminates the need for an external output coupling capacitor while maintaining the high-fidelity characteristics associated with Class-AB amplification.
The principal performance features include 2.7 W output into a 4 Ω speaker, approximately 90% efficiency, and integrated 250 mΩ MOSFETs. Low-EMI operation is especially useful in compact products containing sensitive wireless, audio, or control circuitry. Startup and shutdown pop elimination improves listening behavior by reducing transient disturbances, while short-circuit protection improves fault tolerance in portable audio systems.
The MP1720 architecture integrates the power stage, control electronics, and protection functions into one package. According to the Monolithic Power Systems MP1720 product page, the integrated MOSFETs have an on-resistance of 250 mΩ when VIN is 3.3 V. This integration reduces external component count and board area, although actual acoustic performance still depends on the speaker impedance, supply voltage, PCB grounding, input filtering, and output-loop layout.
Typical uses include compact Bluetooth speakers, portable audio players, personal audio devices, sound bars, notification speakers, and small embedded audio modules. The 10-MSOP-EP package supports compact board layouts, while the exposed-pad construction provides a thermal path for the internal switching stage. The manufacturer specifically recommends low-voltage-coefficient tantalum, aluminum electrolytic, or suitable ceramic supply capacitors.
The primary design consideration is switching-node layout. Keep the MP1720 output loop compact, provide a low-impedance ground path, place input and supply capacitors close to their associated pins, and avoid routing sensitive audio signals beneath the amplifier or switching nodes. Incorrect output filtering or capacitor selection can increase EMI and audio distortion even when the nominal 2.7 W output rating is met.
This product record consolidates the verified distributor classification, manufacturer performance claims, family alternatives, and application-specific design guidance into one engineering reference. It distinguishes confirmed capabilities from specifications that still require confirmation from the complete manufacturer datasheet before a production design is released.
Drop-in alternatives for MP1720DH-12-LF-P — 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 MP1720DH-12-LF-P (same form factor and footprint) — differing in Output Configuration, Product Type.
MP1720DH-6-LF-P
✅ Drop-In📋 Reference alternative (not in catalog)
MP1720DH-216-LF-P
✅ Drop-InContact for price
View Datasheet →MP1720DH-LF-P
✅ Drop-In📋 Reference alternative (not in catalog)
MP1720DH-12-LF-Z
✅ Drop-In📋 Reference alternative (not in catalog)
MP1720DH-12-LF
✅ Drop-In📋 Reference alternative (not in catalog)
MP1720DH-12-LF-P Maximum Ratings & Electrical Characteristics
| Product Type | Mono Class-D audio amplifier |
| Output Power | 2.7 W into 4 Ω |
| Output Configuration | Full-bridge differential output |
| Efficiency | 90% |
| Integrated MOSFET On-Resistance | 250 mΩ at VIN = 3.3 V |
| Channel Count | 1 channel |
| Package | 10-MSOP-EP |
| Mounting Type | Surface mount |
| EMI | Low EMI |
| Startup Pop Elimination | Supported |
| Shutdown Pop Elimination | Supported |
| Short-Circuit Protection | Supported |
| Output Coupling Capacitor | Not required with full-bridge output |
| Supply Capacitor Recommendation | Low-voltage-coefficient tantalum or aluminum electrolytic; X7R ceramic preferred over Y5V or Z5U |
MP1720DH-12-LF-P 10-msop-ep Pin Configuration Guide
Pin configuration for MP1720DH-12-LF-P (10-msop-ep 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 MP1720DH-12-LF-P.
Refer to the datasheet for full pin configuration.
Typical Applications
MP1720DH-12-LF-P is suitable for 6 applications: Compact Bluetooth Speaker, Portable Audio Player, Personal Audio Device, Sound Bar Notification Speaker, Industrial Audio Annunciator, Embedded Audio Module.
Compact Bluetooth Speaker
The MP1720DH-12-LF-P fits a compact Bluetooth speaker power stage because its full-bridge Class-D topology delivers a verified 2.7 W into a 4 Ω speaker while maintaining approximately 90% efficiency. The differential output avoids a speaker coupling capacitor, reducing component count and helping preserve low-frequency response. Integrated startup and shutdown pop elimination is useful when the audio source repeatedly enters and leaves an active state. The principal system concern is EMI coexistence with the Bluetooth radio: the MP1720 is specified as low-EMI, but final validation still requires measurements with the actual PCB, speaker wiring, enclosure, and antenna configuration.
Recommended
Portable Audio Player
The MP1720DH-12-LF-P is appropriate for a battery-powered portable audio player requiring a small mono speaker amplifier. Its verified 90% efficiency reduces the power burden of a 2.7 W output stage, while the 10-MSOP-EP package limits PCB footprint. The full-bridge output structure eliminates the external speaker coupling capacitor, which saves board area and avoids frequency-dependent attenuation introduced by a series capacitor. Designers should still budget passive losses, speaker impedance variation, and the amplifier thermal path. A low-impedance ground plane and short output loops remain essential for clean switching behavior and low radiated emissions.
Recommended
Personal Audio Device
The MP1720DH-12-LF-P can serve as the mono speaker driver in a personal audio device where energy efficiency and short startup transients are important. The verified 2.7 W capability is suitable for small speakers, and the approximately 90% efficiency rating supports longer battery operation than a comparable inefficient output stage. Startup and shutdown pop elimination reduces audible clicks during user-interface events, while short-circuit protection adds a basic safeguard for wiring faults. The manufacturer advises low-voltage-coefficient supply capacitors; implementing that guidance helps prevent supply ripple from modulating the audio output and degrading perceived sound quality.
Recommended
Sound Bar Notification Speaker
The MP1720DH-12-LF-P is suitable for notification or auxiliary-speaker channels in a compact sound bar because it provides a verified 2.7 W mono output with approximately 90% efficiency. The low-EMI characteristic helps when amplifier switching activity shares a PCB with digital audio, wireless control, or display circuitry. Its full-bridge output simplifies connection to a conventional speaker without a series output capacitor, although differential routing must remain short and symmetric. System designers should test idle behavior, startup transients, and maximum-volume distortion against the actual 4 Ω speaker because nominal power alone does not define acoustic headroom or thermal performance.
Recommended
Industrial Audio Annunciator
The MP1720DH-12-LF-P can power a low-power industrial annunciator or machine-status speaker where the verified 2.7 W output is sufficient. Approximately 90% efficiency supports space-constrained control panels, and the integrated short-circuit protection is valuable when the speaker or wiring may be exposed to field conditions. The 10-MSOP-EP package enables compact placement, but industrial qualification requirements, operating-temperature limits, and EMC performance must be confirmed from the complete datasheet. EMI validation should include the final cable routing because a low-EMI amplifier can still produce system-level emissions when output wiring is long or poorly terminated.
Recommended
Embedded Audio Module
The MP1720DH-12-LF-P is suitable for an embedded audio module requiring efficient mono-speaker drive with minimal external hardware. The verified 2.7 W capability, full-bridge topology, integrated protection, and low-EMI operation simplify implementation in compact modules. Pop elimination improves behavior during firmware-driven enable and shutdown sequences, while the 90% efficiency rating reduces conversion losses. The manufacturer recommends suitable low-voltage-coefficient capacitors, and those components should be placed close to the device with a compact supply return path. Before release, confirm the exposed-pad soldering process and thermal performance under the enclosure's actual temperature conditions.
Recommended
Recommended Products Summary
Engineering reference data for MP1720DH-12-LF-P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MP1720DH-6-LF-P | MP1720DH-216-LF-P | MP1720DH-LF-P | MP1720DH-12-LF-Z | MP1720DH-12-LF |
|---|---|---|---|---|---|---|
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| Package | 10-MSOP-EP | 10-MSOP-EP - same package family | 10-MSOP-EP - same package family | 10-MSOP-EP - same package family | 10-MSOP-EP - same package family | 10-MSOP-EP - same package family |
| Output Power | 2.7 W into 4 Ω | 2.7 W into 4 Ω | 2.7 W | 2.7 W | 2.7 W | 2.7 W |
| Amplifier Class | Class D | Class D | Class D | Class D | Class D | Class D |
| Channel Count | Mono | Mono | Mono | Mono | Mono | Mono |
| Efficiency | 90% | 90% | 90% | 90% | 90% | 90% |
| Integrated MOSFET On-Resistance | 250 mΩ at VIN = 3.3 V | 250 mΩ at VIN = 3.3 V | 250 mΩ at VIN = 3.3 V | 250 mΩ at VIN = 3.3 V | 250 mΩ at VIN = 3.3 V | 250 mΩ at VIN = 3.3 V |
| EMI Characteristic | Low EMI | Low EMI | Low EMI | Low EMI | Low EMI | Low EMI |
| Special Features | Pop elimination and short-circuit protection | Pop elimination and short-circuit protection | Pop elimination and short-circuit protection | Pop elimination and short-circuit protection | Pop elimination and short-circuit protection | Pop elimination and short-circuit protection |
Key Differentiators
- High verified conversion efficiency (vs MP1720DH-6-LF-P)
- Integrated low-EMI power stage (vs MP1720DH-216-LF-P)
- Full-bridge output reduces external component count (vs MP1720DH-12-LF)
- Compact integrated audio power solution (vs MP1720DH-LF-P)
Design Notes
Keep the Class-D output loop and exposed-pad connection compact, and use a continuous ground plane to provide a low-impedance return for switching current. Place the MP1720 supply capacitor directly beside its supply and ground pins, then route speaker outputs as short, matched traces. Do not run sensitive input or microphone signals beneath the amplifier outputs; the low-EMI device designation reduces radiated noise but does not replace sound PCB-layout practice.
Use a supply network that maintains the voltage and current required for the verified 2.7 W output into 4 Ω. The manufacturer recommends tantalum or aluminum electrolytic capacitors with low voltage coefficients, or the largest practical ceramic package using X7R rather than Y5V or Z5U. This recommendation matters because ceramic capacitance and bias behavior can affect supply ripple, output distortion, and switching stability. Validate capacitor DC-bias derating at the actual operating voltage.
Treat the exposed pad as both an electrical connection and the primary thermal path. Follow the manufacturer's land pattern and solder-process requirements, fill or via-connect the exposed pad as recommended, and avoid creating a void beneath the device during reflow. Because the verified source specifies 90% efficiency but not a complete thermal-resistance table, do not assume the pad is adequate without checking the maximum dissipation, ambient temperature, enclosure temperature, and PCB copper area for the final installation.
Do not substitute the MP1720 family solely because several order codes share the 2.7 W Class-D description. The verified results do not provide the complete numerical distinction between the 6, 12, 216, LF-P, LF-Z, and non-P variants. Compare the manufacturer datasheet for gain, operating-mode thresholds, supply limits, protection behavior, and pin configuration. Also verify the exposed-pad dimensions and land pattern before treating any family variant as a board-level drop-in replacement.
Compliance Information
The supplied verified snippets do not contain explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is marked not applicable because this is an audio amplifier IC and no automotive qualification is stated in the supplied data.
