TPA301DGH - 350mW Mono Class-AB Amplifier | Texas Instruments
MPN: TPA301DGH ✓ AktifTPA301DGH Genel Bakış
An audio power amplifier is an integrated circuit that converts low-level audio signals into current and voltage capable of driving a loudspeaker or other electroacoustic load. The TPA301 belongs to the Class-AB audio amplifier hierarchy, which sits within integrated amplifier ICs and the broader power management and analog signal-processing semiconductor categories. A BTL output arrangement uses both sides of the speaker to develop voltage swing while avoiding the need for a single-ended output coupling capacitor.
The principal performance characteristics include 350mW nominal output power, operation from a 3.3V supply, and 250mW continuous output into an 8Ω BTL load. According to the Texas Instruments TPA301 product information, total harmonic distortion plus noise remains below 1% across voice-band frequencies under the stated operating condition. Although the amplifier is characterized through 20kHz, its operation is optimized for voice-band audio rather than high-fidelity full-range reproduction.
The Class-AB output stage provides a practical compromise between conduction efficiency and signal linearity. Compared with a switching audio amplifier, the TPA301 avoids the high-frequency switching artifacts and electromagnetic interference commonly associated with converter-based power stages. Conversely, a linear Class-AB amplifier dissipates more power as the supply-to-load voltage difference increases, making load selection and supply voltage important during thermal and battery-budget analysis.
Typical uses include portable speakers, voice-enabled personal audio products, compact sound modules, and low-voltage embedded audio systems. The 3.3V supply requirement aligns with portable equipment powered by regulated batteries or point-of-load rails, while the 250mW capability into 8Ω is suitable for small internal speakers. System designers must still verify speaker impedance, peak current, thermal rise, output distortion, and startup behavior against the complete manufacturer datasheet.
When designing around the TPA301DGH, preserve the manufacturer-recommended input, bypass, and output-network layout. Do not infer a pin configuration or exposed-pad connection from the DGH ordering code alone. Confirm the exact package drawing, exposed thermal-pad requirements, maximum supply voltage, output-current limits, and operating-temperature limits against the current Texas Instruments documentation before releasing a PCB design.
This page consolidates verified manufacturer and distributor information, current Rochester Electronics pricing, application guidance, design cautions, and substitution-status findings. It explicitly separates confirmed specifications from unavailable parameters so engineers can trace each decision to source data rather than relying on an unverified generic TPA301 listing.
Drop-in alternatifler için TPA301DGH — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu ürüne yer değiştirme seçenekleri mevcut değil.
Alternatifleri Talep EdinTPA301DGH Maksimum Değerlendirmeler & Elektriksel Özellikler
| Product Type | Mono Class-AB audio power amplifier |
| Output Power | 350mW |
| Continuous Output Power | 250mW into an 8Ω BTL load at 3.3V |
| Besleme Gerilimi | 3.3V |
| Çıkış Konfigürasyonu | Bridge-tied load (BTL) |
| Channel Count | 1 channel |
| Amplifier Class | Class AB |
| THD+N | Less than 1% into an 8Ω BTL load at 3.3V and 250mW throughout the voice band |
| Characterization Frequency | 20kHz |
| Optimization Band | Voice band |
| Package Designation | DGH |
TPA301DGH dgh Pin Yapısı Kılavuzu
TPA301DGH (dgh paket) için pin yapısı. Bu analog bileşen, giriş, çıkış ve güç besleme pinleri içerir. Ofset null, telafi ve etkinleştirme pin yapılandırmaları için üretici veri kitapçığını referans alın. Sinyal işleme ve güç amplifikasyon devreleri için mükemmel bir bileşendir.
Ayrıntılı pin çıkış verisi mevcut değil: TPA301DGH.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
TPA301DGH için uygundur 6 uygulamas: Portable Voice Speaker, Battery-Powered Audio Module, Voice-Centric Smart Speaker, Industrial Audio Notification Module, Compact Instrumentation Buzzer Replacement, Low-Voltage Learning and Assistive Audio Device.
Portable Voice Speaker
TPA301DGH fits a compact voice speaker powered from a regulated 3.3V rail because it can deliver 250mW continuously into an 8Ω bridge-tied-load speaker at less than 1% THD+N in the voice band. The Class-AB output avoids the high-frequency switching artifacts associated with a small switching power stage, which can help preserve speech intelligibility. The speaker must be rated for a BTL connection, and the output network and grounding should follow the Texas Instruments TPA301 reference layout. Peak playback level must also be checked against the load impedance because a nominal 8Ω rating does not establish maximum excursion or thermal margin.
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Battery-Powered Audio Module
The TPA301DGH is appropriate for battery-powered audio modules that operate from a regulated 3.3V supply and use a small 8Ω internal speaker. Its confirmed 250mW continuous capability provides useful acoustic output without requiring a high-voltage Class-D rail. The trade-off is linear amplifier dissipation: as the output voltage and current increase, power is converted into heat rather than recovered through switching. Designers should therefore model the speaker impedance over frequency, limit sustained volume, and provide copper area beneath any exposed thermal pad exactly as specified by the manufacturer datasheet.
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Voice-Centric Smart Speaker
TPA301DGH can serve as the speaker amplifier in a voice-centric smart device where speech reproduction matters more than full-range fidelity. The verified 250mW output into an 8Ω BTL load and less than 1% THD+N throughout the voice band support clear speech reproduction at low listening levels, while the linear Class-AB topology avoids audible switching-frequency modulation. A microphone signal path should remain physically separated from the BTL outputs, and system gain should be calibrated with the final speaker because enclosure acoustics can materially alter perceived output and distortion.
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Industrial Audio Notification Module
TPA301DGH is suited to industrial notification and status-audio modules that use a local 8Ω speaker and a 3.3V embedded supply. Its Class-AB BTL architecture supports voice-band alerts while avoiding the need for an output coupling capacitor and reducing switching-related EMI compared with a power-converter amplifier. The design must verify the module's ambient temperature, continuous alert duration, speaker thermal limits, and available supply headroom. Alarm bursts also require peak-current analysis; the continuous 250mW specification alone should not be treated as permission for unlimited short-duration output.
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Compact Instrumentation Buzzer Replacement
TPA301DGH can replace a simple buzzer stage with intelligible voice-band audio when a small 8Ω BTL speaker is available. The device's 350mW product rating and 250mW continuous output into 8Ω at 3.3V provide a defined operating target for embedded equipment designers. Because the verified data does not specify the exact input sensitivity, shutdown behavior, or thermal limits, those values must be obtained from the current manufacturer datasheet. PCB changes require confirmation of the DGH footprint, pin assignments, and exposed-pad requirements rather than reliance on the similar TPA301D listing.
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Low-Voltage Learning and Assistive Audio Device
TPA301DGH can support spoken prompts, feedback tones, or assistive audio in battery-operated learning and health-adjacent devices that already provide a 3.3V rail. The linear Class-AB stage can provide clean voice-band output from a small internal 8Ω BTL speaker without adding a high-frequency switching amplifier and its associated electromagnetic-emission concerns. For medical or wellness products, developers should still apply the risk controls required by their intended use, validate acoustic output under worst-case operating conditions, and confirm that the package exposes adequate thermal area for the enclosure and ambient conditions.
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Mühendislik referans verileri: TPA301DGH — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün |
|---|---|
| Package | DGH package designation; exact dimensions and pin count not verified |
| Brand | Texas Instruments |
| Product Type | Mono Class-AB audio power amplifier |
| Rated Output Power | 350mW |
| Continuous Output Power | 250mW into an 8Ω BTL load at 3.3V |
| Supply Voltage | 3.3V |
| Output Configuration | Bridge-tied load (BTL) |
| THD+N | Less than 1% at 250mW into 8Ω throughout the voice band |
| Characterization Frequency | 20kHz |
| Price at 1 Unit | $0.34 as of 2026-10-28 |
Ana Farklılayıcılar
- Defined voice-band performance at a low 3.3V supply (karşılaştırma:TPA301D)
- Linear Class-AB speaker drive avoids converter switching artifacts (karşılaştırma:Unspecified switching Class-D alternatives)
- Low-voltage integration for compact audio products (karşılaştırma:Higher-power audio amplifiers)
Tasarım Notları
Use the current Texas Instruments DGH package drawing and recommended land pattern rather than deriving the footprint from the TPA301D 8-SOIC listing. Verify every pin function, the exposed-pad connection, and the thermal-pad soldering requirements against the applicable datasheet revision. Keep the input and bypass capacitors close to their associated pins, provide a low-impedance ground return, and route the BTL speaker outputs as a short differential pair away from microphone and sensor inputs.
The verified operating point is 3.3V with 250mW continuous output into an 8Ω BTL load and less than 1% THD+N through the voice band. Do not treat the 350mW product rating as permission to operate continuously above the verified load condition. Check the real speaker impedance across frequency, calculate peak speaker current for maximum signal amplitude, and confirm that the 3.3V rail remains within the limits specified by the current manufacturer datasheet under transient and alert conditions.
Estimated: Class-AB amplifier dissipation depends on the actual supply voltage, output waveform, load impedance, and duty cycle. Using only the confirmed 3.3V operating condition, the input-power ceiling for 250mW into 8Ω is 1.0325W before amplifier losses, so engineers must also account for quiescent current, output-stage losses, copper spreading, and ambient temperature. These figures are design estimates rather than datasheet guarantees; use the manufacturer thermal information for final junction-temperature and exposed-pad calculations.
A BTL amplifier drives the speaker differentially: neither output should be tied to ground or connected to a grounded single-ended input. Speakers must have two independent voice-coil terminals, and protection components must be rated for the actual differential output voltage. Do not substitute TPA301D solely because it is in the same family; the verified data lists TPA301D as 8-SOIC, while the exact DGH footprint and pin list are not supplied. Confirm mechanical and electrical compatibility before ordering a replacement.
Uyumluluk Bilgisi
The supplied verified data does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or distributor listings.
