TPA301DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments TPA301DG4 is a single-channel Class-AB audio power amplifier delivering 0.7 W output power with 0.5% harmonic distortion. It supports a 20 kHz audio bandwidth for full-range speaker drive and is housed in an 8-pin SOIC package. Suitable for battery-powered portable audio devices requiring compact mono amplification.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TPA301DG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPA301DG4?
- 0.7 W Class-AB mono audio amplifier with 0.5% total harmonic distortion delivers clean audio output to small speakers
- 20 kHz audio bandwidth covers the full audible spectrum for voice, alert tones, and music playback
- 8-pin SOIC package enables compact PCB layout with minimal external components for low-cost speaker drive
- Single-channel design in SOIC-8 with e4 RoHS-compliant termination suits cost-sensitive consumer and industrial audio applications
What is TPA301DG4 used for?
The TPA301DG4 is used in battery-powered portable devices such as handheld radios, toy speakers, smoke alarm voice modules, and consumer intercom systems where a compact 0.7 W mono audio output is required. Its Class-AB topology provides low harmonic distortion at 0.5%, making it appropriate for voice clarity in speech-output products such as medical alert devices and point-of-sale terminals. The 8-pin SOIC form factor and simple application circuit with minimal external passives reduce board complexity in cost-sensitive designs.
What are the specifications of TPA301DG4?
| YTEOL | 0 |
| Bandwidth-Nom | 20kHz |
| Consumer IC Type | AUDIO AMPLIFIER |
| Harmonic Distortion | 0.5% |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Output Power-Nom | 0.7W |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 1.5mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the TPA301DG4 datasheet?
TPA301DG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPA301DG4?
Compatible alternatives and drop-in replacements for TPA301DG4:
Frequently Asked Questions
What output power and distortion level does TPA301DG4 deliver, and which speaker impedances is it compatible with?
TPA301DG4 delivers 0.7 W nominal output power at 0.5% total harmonic distortion. Class-AB audio amplifiers of this power level are typically designed to drive 4 Ω or 8 Ω speakers, with output power varying by load — the 0.7 W rating is typically at 8 Ω. At 4 Ω a higher output power is achievable within supply voltage limits. For a small 8 Ω speaker in a handheld device, 0.7 W provides adequate loudness for voice alerts and notification tones.
How does TPA301DG4's 20 kHz bandwidth compare to what is needed for voice versus high-fidelity music playback?
Human speech occupies roughly 300 Hz to 3.4 kHz for phone-grade intelligibility, and 20 Hz to 8 kHz for natural voice quality. The TPA301DG4's 20 kHz audio bandwidth extends well beyond both voice ranges and covers the full audible spectrum up to the 20 kHz upper limit of human hearing. For high-fidelity music playback with full treble reproduction, the 20 kHz bandwidth is adequate, though Class-AB amplifiers with 0.5% THD are better suited to voice and alarm applications than audiophile-grade Hi-Fi systems targeting below 0.01% distortion.
Can TPA301DG4 operate from a single-cell Li-Ion battery at 3.7 V, and what output power is expected at that supply?
TPA301DG4 is a Class-AB amplifier and its maximum output power scales with the supply voltage squared divided by twice the load impedance for a single-supply design. At 3.7 V supply into an 8 Ω load, the theoretical maximum sine wave output approaches 0.6 W to 0.85 W depending on output swing headroom. For a single Li-Ion cell ranging from 3.0 V (depleted) to 4.2 V (full), the amplifier operates across the full battery discharge range, producing usable audio output at both extremes — making it practical for portable battery-powered gadgets.
How does TPA301DG4 in SOIC-8 compare to a discrete Class-AB transistor amplifier in terms of BOM and PCB area?
A discrete Class-AB transistor audio amplifier for 0.7 W output typically requires 2 to 4 transistors, multiple biasing resistors, coupling capacitors, and feedback components — often 10 to 15 components consuming 2 cm² to 4 cm² of PCB area. TPA301DG4 integrates the entire amplifier in an 8-pin SOIC package measuring approximately 5 mm x 4 mm, requiring only input coupling capacitors and a bypass capacitor externally. This reduces total component count by 8 to 12 parts and PCB area by over 50%, with better thermal and performance consistency versus hand-tuned discrete designs.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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