TPA301DGN - 350mW Mono Class-AB Amplifier | Texas Instruments
部品番号: TPA301DGN ✓ 生産中TPA301DGN 概要
An audio power amplifier is an integrated circuit that converts a low-level audio input signal into a current and voltage capable of driving a loudspeaker or other high-impedance acoustic load. The TPA301 belongs to the Class-AB audio amplifier hierarchy, where output transistors conduct for part of each signal cycle to balance efficiency and low crossover distortion. Its bridge-tied-load topology develops an output across the two speaker terminals without requiring a DC-blocking capacitor.
The TPA301 is specified for both 3.3 V and 5 V supply operation, providing broad compatibility with portable and low-voltage embedded systems. Its 350 mW headline output capability is suitable for compact internal speakers, while the 250 mW result at 3.3 V into 8 ohms is especially relevant to battery-powered equipment. The manufacturer describes operation as optimized for the voice band, although the device is characterized through 20 kHz.
Thermal and short-circuit protection support reliable operation in compact audio products, while shutdown mode limits quiescent current to 0.15 microamps according to the available component data. These characteristics make the TPA301 applicable to portable speakers, personal-audio accessories, embedded audio products, and other compact systems where supply headroom is limited. The 8-pin HVSSOP package also reduces board area compared with larger leaded audio-amplifier packages.
A BTL output requires the speaker to be connected between the two output terminals; connecting either output terminal to ground is not an equivalent single-ended configuration. Designers should also verify the complete speaker-impedance range, supply-voltage tolerance, thermal conditions, input-coupling network, and output-routing requirements against the manufacturer datasheet before production release.
This page consolidates the verified manufacturer and distributor information for the TPA301DGN, including its 350 mW mono Class-AB configuration, low-voltage operating range, 8-pin HVSSOP format, candidate comparison parts, and practical implementation guidance. It is intended to support engineering selection while clearly separating verified specifications from data that still requires manufacturer-datasheet confirmation.
ドロップイン代替品: TPA301DGN — 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: TPA301DGN （同一形状・フットプリント） — 相違点: Output Configuration, Product Type.
TPA311DGN
✅ 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 →TPA6205A1DGNRG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPA321DGNR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPA301DGN 最大定格＆電気的特性
| Product Type | Mono Class-AB audio power amplifier |
| Maximum Output Power | 350 mW |
| Continuous Output Power at 3.3 V into 8 ohm BTL | 250 mW |
| 動作電源電圧 | 3.3 V to 5 V |
| 出力構成 | Bridge-tied load (BTL) |
| THD+N at 3.3 V, 250 mW into 8 ohm | <1% through voice-band frequencies |
| Characterized Frequency Range | Up to 20 kHz |
| Shutdown Quiescent Current | 0.15 uA |
| Protection | Thermal and short-circuit protection |
| Number of Channels | 1 channel |
| パッケージ | 8-pin HVSSOP (DGN) |
| ピン数 | 8 pins |
| 実装タイプ | Surface mount |
TPA301DGN 8-pin hvssop (dgn) ピン配置ガイド
TPA301DGN (8-pin hvssop (dgn) 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: TPA301DGN.
詳細は データシート をご参照ください。
主な用途
TPA301DGN の用途: 6 件s: Portable Mono Speaker, Personal Audio Accessory, Embedded Voice Device, Compact IoT Audio Node, Battery-Powered Sound Module, Industrial Control Annunciator.
Portable Mono Speaker
The TPA301DGN fits a compact battery-powered speaker because it operates from a 3.3 V supply and can deliver 250 mW continuously into an 8-ohm bridge-tied-load speaker at less than 1% THD+N through the voice band. The 350 mW Class-AB device therefore provides useful output margin without requiring a high-voltage audio amplifier. Its 0.15-microamp shutdown current also helps when the product spends substantial time idle. The speaker must connect between the two BTL outputs, while input filtering and supply bypassing should follow the manufacturer layout guidance. Thermal performance should be checked at the highest expected enclosure temperature.
おすすめ
Personal Audio Accessory
A personal-audio accessory can use the TPA301DGN when it requires a small mono Class-AB output stage operating at 3.3 V or 5 V. The verified 250 mW result into 8 ohms at 3.3 V is suitable for compact internal transducers, while the less-than-1% THD+N voice-band specification helps preserve intelligibility in speech-oriented products. The 8-pin HVSSOP package conserves board area, but production layouts still need correct BTL routing, stable input and output return paths, and adequate copper for thermal dissipation. Shutdown can be used to reduce standby consumption when the accessory is not active.
おすすめ
Embedded Voice Device
The TPA301DGN is appropriate for an embedded voice device because its operation is optimized for voice-band frequencies and it can sustain 250 mW into an 8-ohm BTL load at 3.3 V. This gives designers a direct speaker-drive stage without using a higher-power amplifier class unnecessarily. The 20 kHz characterization limit supports audio designs beyond the principal voice range, while the shutdown feature can lower idle consumption. Designers should still verify distortion, output offset, speaker impedance, and protection behavior in the final enclosure, because acoustic pressure depends on speaker sensitivity as well as electrical output power.
おすすめ
Compact IoT Audio Node
The TPA301DGN can drive the local alert speaker in a compact IoT audio node powered from 3.3 V. Its 250 mW capability at 8 ohms is useful for notification tones and speech playback without introducing a large Class-D power stage, while shutdown current of 0.15 microamps supports low-power operating states. The bridge-tied-load arrangement keeps the speaker drive efficient enough for a small PCB, although output-routing errors can damage the device. Firmware-controlled shutdown timing, input-pop behavior, and supply startup sequencing should be evaluated to avoid audible transients or unintended speaker current.
おすすめ
Battery-Powered Sound Module
A battery-powered sound module benefits from the TPA301DGN because the device is specified for both 3.3 V and 5 V rails and provides a compact 350 mW mono Class-AB output stage. At 3.3 V, the verified 250 mW rating into 8 ohms is adequate for small speakers where battery energy and board area are constrained. The amplifier should be placed close to its speaker connection, with short output traces and a clean return path to reduce noise pickup. Designers must account for regulator efficiency and amplifier dissipation when calculating total battery life, especially during sustained playback.
おすすめ
Industrial Control Annunciator
The TPA301DGN can drive a small audible annunciator in an industrial control enclosure where a 3.3 V or 5 V local rail is available. Its 350 mW Class-AB capability and 250 mW continuous output at 3.3 V into 8 ohms are appropriate for compact buzzer-like or miniature speaker transducers, while short-circuit protection adds robustness. Industrial environments may introduce EMI and temperature variation, so filtering, grounding, and enclosure design remain important. The datasheet limits should be checked against the worst-case rail and ambient conditions before using the device outside a consumer-style enclosure.
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: TPA301DGN — 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 | TPA311DGN | TPA6205A1DGNRG4 | TPA321DGNR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin HVSSOP (DGN) | 8-pin HVSSOP (DGN) | 8-pin HVSSOP (DGN) | 8-pin HVSSOP (DGN) |
主な差別化要因
- Purpose-built low-voltage mono Class-AB output （vs TPA311DGN)
- Documented 250 mW output at 3.3 V into 8 ohms （vs TPA6205A1DGNRG4)
- Very low verified shutdown current （vs TPA321DGNR)
設計ノート
The TPA301 uses a bridge-tied-load output, so the speaker must be connected between the two designated output terminals rather than between one output and ground. The verified product information does not provide the individual DGN pin names, preventing a safe connection diagram from being reproduced here. Before layout or assembly, download the current manufacturer datasheet and verify the DGN pinout, output polarity, input pins, shutdown pin, and exposed thermal pad requirements.
Place the TPA301 close to the speaker connector and keep the BTL output traces short and symmetric. A compact 8-pin HVSSOP package can help reduce PCB area, but trace resistance and unequal routing may contribute to distortion or channel imbalance. Follow the manufacturer layout and grounding guidance, provide local supply bypassing, and use a continuous return path from the amplifier and input network to the system ground reference.
Check the amplifier dissipation at the highest expected supply voltage, speaker impedance, signal level, and ambient temperature rather than relying only on the 350 mW headline rating. The verified data confirms thermal and short-circuit protection but does not provide junction-temperature, thermal-resistance, or package-boundary values. Use the current Texas Instruments datasheet for those limits and provide adequate copper area around the 8-pin HVSSOP footprint where the recommended layout requires it.
The 3.3 V capability is important for battery-powered and portable designs because it can operate directly from a common low-voltage rail, subject to the exact supply limits. Confirm the regulator's startup behavior, ripple, and output impedance so switching noise does not degrade the voice-band audio signal. The available data also identifies a 0.15-microamp shutdown current, making shutdown-control polarity and sequencing important to low-power system design.
コンプライアンス情報
The supplied manufacturer and distributor snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred.
