MP1720DH-216-LF - 2.7W Mono Class-D Audio Amplifier | Monolithic Power Systems
部品番号: MP1720DH-216-LF ✓ 生産中MP1720DH-216-LF 概要
A Class-D amplifier is a switching power stage whose output MOSFETs are driven fully on and fully off, so the transistor dissipates very little power compared with a linear Class-AB stage. In the product-type hierarchy, the MP1720 sits as an audio power amplifier within amplifier ICs, inside the broader power management and signal-conditioning IC category, sitting functionally below a Class-AB or Class-AB/D hybrid amplifier.
Key features include a pin-selectable 1 MHz or 1.3 MHz switching frequency or synchronization to an external clock source, an internal EMI-reduction scheme that removes the need for an output LC filter while still passing emission standards, and startup/shutdown pop elimination for clean audible start. On-chip short-circuit and thermal overload protection remove the need for external fault handling, and five fixed gain options let the designer avoid external gain-setting networks in most designs.
The 20 kHz closed-loop bandwidth matches typical Class-D performance for compact speakers, while the filterless full-bridge drive reduces board area and external component count in portable audio products. The exposed pad ties to ground and carries the majority of the dissipation path, so thermal design of the PCB copper pour is the primary layout consideration.
Typical applications include compact Bluetooth and portable speakers, USB-C audio dongles, notification and alert speakers in smart-home devices, headphone and game-console accessories, and small industrial or automotive auxiliary audio modules where a 2.5 V to 5.5 V rail is available.
When designing around the MP1720, keep the input and decoupling capacitors close to their pins, provide adequate copper under the exposed pad, and confirm that the selected fixed-gain option matches the sensitivity of the source. Because the part is a switching amplifier, place it away from sensitive analog or RF traces to limit switching-node coupling.
This page consolidates manufacturer and distributor information into a practical engineering reference, including parameter-by-parameter comparison against same-family MPS drop-in options, design notes for EMI and thermal layout, and application guidance that is not present on a standard distributor listing page.
ドロップイン代替品: MP1720DH-216-LF — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MP1720DH-216-LF （同一形状・フットプリント） — 相違点: Output Configuration, Product Type, Package, Operating Temperature Range, Output Power.
MP1720DH-216-LF-Z
✅ ドロップイン価格はお問い合わせください
データシートを見る →MP1720DH-216-LF-P
✅ ドロップイン価格はお問い合わせください
データシートを見る →MP1720DH-6-LF-P
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MP1720DQ-3-LF-P
✅ ドロップイン価格はお問い合わせください
データシートを見る →MP1720DQ-3-LF-Z
✅ ドロップイン価格はお問い合わせください
データシートを見る →MP1720DH-216-LF 最大定格＆電気的特性
| Product Type | Mono Class-D audio power amplifier (1 channel) |
| Output Power | 2.7 W into 4 ohm (2.78 W maximum per distributor listing) |
| 出力構成 | Full-bridge (BTL), differential output, no output coupling capacitors required |
| Supply Voltage Range (VS) | 2.5 V to 5.5 V |
| 効率 | Up to 90% (Class-AB-like fidelity with Class-D efficiency) |
| Closed-Loop Bandwidth | 0.020 MHz (20 kHz) |
| スイッチング周波数 | 1 MHz or 1.3 MHz, pin-selectable; can be synchronized to an external clock |
| Integrated Output MOSFET RDS(on) | 250 mOhm at VIN = 3.3 V |
| Gain Options | Five fixed gain options |
| EMI Filtering | Internal EMI-reduction scheme; passes emission standards without an output LC filter |
| Protection Features | Short-circuit protection and thermal overload protection |
| Pop Noise Control | Startup and shutdown pop elimination |
| パッケージ | 10-MSOP-EP (MO-187BA-T) with exposed thermal pad |
| 実装タイプ | Surface mount |
| 動作温度範囲 | -40 C to +85 C |
MP1720DH-216-LF 10-msop-ep (mo-187ba-t) with exposed thermal pad ピン配置ガイド
MP1720DH-216-LF (10-msop-ep (mo-187ba-t) with exposed thermal pad パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: MP1720DH-216-LF.
詳細は データシート をご参照ください。
主な用途
MP1720DH-216-LF の用途: 6 件s: Portable Bluetooth Speaker, USB-C Audio Dongle, Smart Home Voice Assistant Speaker, Handheld Game Console Accessory, Industrial Notification and Alert Speaker, Small Form-Factor Speaker Module.
Portable Bluetooth Speaker
The MP1720DH-216-LF is suited to compact Bluetooth speakers that run from a single-cell Li-ion or a 3.3 V regulator rail, because its 2.5 V to 5.5 V supply range and up to 90% efficiency limit battery drain while delivering 2.7 W into a 4 ohm driver. The internal EMI-reduction scheme and pin-selectable 1 MHz or 1.3 MHz switching frequency let the board pass emission standards with no output LC filter, which frees board area in a tightly packed enclosure. Short-circuit protection matters here because speaker leads are routinely exposed to shorts, and startup/shutdown pop elimination keeps the output quiet when the radio powers up or down.
おすすめ
USB-C Audio Dongle
In a USB-C headphone or line-out dongle the MP1720DH-216-LF can be driven straight from the 5 V USB bus, since its supply range of 2.5 V to 5.5 V covers 5 V directly and the part needs no output coupling capacitors in a bridged configuration. The 20 kHz closed-loop bandwidth is adequate for full-bandwidth music reproduction in a dongle format, and the filterless full-bridge drive keeps the PCB small enough for a pocket-sized enclosure. Thermal load is modest because the difference between 5 V and a 2 V headphone load is small, so the exposed pad can be handled by ordinary copper pour.
おすすめ
Smart Home Voice Assistant Speaker
Voice assistant and smart-home speaker modules need a small, efficient speaker driver that can run from a 3.3 V rail, and the MP1720DH-216-LF delivers 2.7 W into 4 ohm from as little as 2.5 V with up to 90% efficiency. Startup and shutdown pop elimination is valuable in products where the amplifier is switched on and off frequently by a host MCU, and thermal overload plus short-circuit protection reduce firmware burden. Because a smart speaker is often co-located with a microphone array and Wi-Fi radio, the selectable switching frequency and integrated EMI scheme help keep conducted and radiated emissions within limits without an external filter.
おすすめ
Handheld Game Console Accessory
Game console and mobile accessory designs frequently add a mono speaker or notification channel that must run from a low-voltage rail, which is exactly where the MP1720DH-216-LF fits: 2.7 W into 4 ohm from 2.5 V to 5.5 V in a 10-MSOP-EP package that is easy to place on a dense handheld board. The exposed pad serves both as the ground connection and the main heat path, so designers should keep a continuous copper region under it. Pop-free startup and shutdown improve the user experience during game launch and system suspend events, where abrupt amplifier gating is common.
おすすめ
Industrial Notification and Alert Speaker
Industrial and building-automation alert modules use small 4 ohm speakers to deliver audible prompts, and the MP1720DH-216-LF provides 2.7 W of clean Class-D output from a 24 V-down-converted low-voltage rail with high efficiency, reducing both heat and board size. The -40 C to +85 C operating range covers industrial ambient conditions, and on-chip short-circuit and thermal overload protection is valuable in installations where the speaker wiring is long and unprotected. If the module also handles voice prompts, the five fixed gain options allow the amplifier to be matched to the codec output without an external gain network.
おすすめ
Small Form-Factor Speaker Module
For external speaker modules in portable devices, the MP1720DH-216-LF can drive the 4 ohm load directly through its full-bridge outputs, eliminating output coupling capacitors and giving a true differential drive to the speaker terminals. Differential drive halves the effective output voltage swing requirement at the load compared with a single-ended stage, which helps reach 2.7 W from a 2.5 V to 5.5 V supply. If multiple amplifiers are used in a design, the option to synchronize the MP1720 to an external clock prevents beat frequencies between channels and spreads switching energy, a benefit in multi-speaker products.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MP1720DH-216-LF — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MP1720DH-216-LF-Z | MP1720DH-216-LF-P | MP1720DH-6-LF-P | MP1720DQ-3-LF-P | MP1720DQ-3-LF-Z |
|---|---|---|---|---|---|---|
| Package | 10-MSOP-EP (MO-187BA-T) | 10-MSOP-EP - same | 10-MSOP-EP - same | 10-MSOP-EP - same | 10-MSOP-EP - same | 10-MSOP-EP - same |
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| Product Type | Mono Class-D audio power amplifier | Mono Class-D audio power amplifier | Mono Class-D audio power amplifier | Mono Class-D audio power amplifier | Mono Class-D audio power amplifier | Mono Class-D audio power amplifier |
| Output Topology | Full-bridge (BTL) with integrated 250 mOhm MOSFETs at VIN = 3.3 V | Full-bridge (BTL), 250 mOhm MOSFETs | Full-bridge (BTL), 250 mOhm MOSFETs | Full-bridge (BTL) | Full-bridge (BTL) | Full-bridge (BTL) |
主な差別化要因
- Filterless EMI performance removes the output LC filter from the BOM （vs MP1720DQ-3-LF-P)
- Efficient full-bridge drive reaches 2.7 W into 4 ohm from a low-voltage rail （vs MP1720DH-6-LF-P)
- Single-part integration removes discrete output protection and filter networks （vs MP1720DH-216-LF-Z)
設計ノート
Estimated thermal budget: with a 5 V rail driving 4 ohm at 2.7 W, the output average voltage is about 3.3 V, so the amplifier dissipates roughly (5 V - 3.3 V) x 0.54 A = 0.92 W plus switching loss. At 1 W with a 10-MSOP-EP exposed pad, provide as much uninterrupted ground copper under and around the pad as the board outline allows; if the copper area is constrained, estimate the junction rise as PD x theta_JA and confirm the device stays below its -40 C to +85 C rating. Derive all dissipation numbers from the actual rail and load rather than the 2.7 W headline number, which assumes an efficient operating point.
The MP1720 achieves filterless EMI compliance by switching at 1 MHz or 1.3 MHz, chosen via a pin, and can be slaved to an external clock. When multiple amplifiers share a board, drive the frequency pins consistently or synchronize them so switching nodes do not beat against each other and raise radiated emissions. Route the differential output pair as a tight, symmetric pair away from antenna and microphone traces, and keep the input network on the opposite side of the board from the switching outputs to limit differential pickup.
Place the input and bypass capacitors directly at their pins and keep the loop area of the power path minimal, since the exposed pad is both the ground reference and the heat spreader. Maintain a solid ground plane under the device and pour additional copper from the exposed pad into free board area rather than adding a thermal via field without thermal analysis. Because the outputs are full-bridge, the two output pins drive a differential signal; keep the two traces a matched length and avoid routing them over a plane split, which would unbalance the drive and increase distortion.
Two mistakes dominate designs with this part. First, confusing the fixed-gain ordering codes: MP1720DH-216, MP1720DH-6 and MP1720DQ-3 are different gain options, so substituting one for another changes the effective system gain and can overload the codec output. Second, under-estimating heat: the exposed pad must be soldered with adequate paste coverage and a proper land pattern, and a part with a starved thermal path will trip thermal overload protection in a sealed enclosure with no airflow. Always confirm the supply range of the source and the load impedance before layout.
コンプライアンス情報
The retrieved distributor and manufacturer snapshot did not include an explicit RoHS, REACH, AEC-Q100, lead-free or halogen-free statement for the MP1720DH-216-LF ordering code. The MPS family offers a -Z suffix ordering code that denotes the RoHS-compliant lead-free finish, but this was not confirmed verbatim in the verified data. The -40 C to +85 C operating range indicates a commercial/industrial rather than automotive-qualified device.
