Unleash the Power of Sound with Unisonic’s High-Performance Audio Power Amplifiers


Audio power amplifiers, also known as power amps, are devices that act as a crucial intermediary between audio sources and speakers, transforming a faint signal into a powerful and enjoyable listening experience.

This week, we are discussing audio power amplifiers manufactured by Unisonic Technologies Company Ltd. (UTC). Founded in 1990, UTC is a renowned global company that specializes in designing and producing integrated circuits and power semiconductors. UTC offers a vast range of products at competitive prices, and they have their own wafer foundry and assembly operation, which ensures that their products have long life cycles. This means that customers can rely on them for their required parts without having to worry about end-of-life (EOL) issues.

If you are interested in learning more about UTC and their audio power amplifiers, read on. Alternatively, you can scroll down to learn about the various power amplifier classes and their advantages.

UTC’s Audio Power Amplifier

Unisonic is a well-established designer and manufacturer of analog integrated circuits (ICs). Among their line of products, they offer a range of audio power amplifiers in various power, function, and package options, including some that use advanced circuit techniques to ensure low distortion levels and high-power outputs. Other notable features include high current capacities, large output voltage swings, high gain, fast slew rates, and a wide power bandwidth. Furthermore, what distinguishes Unisonic’s products from their competitors is their pin-to-pin compatibility with other manufacturers. Many of their parts series are cross-compatible with ST Micro, Onsemi, Texas Instruments, and Nexperia.

Unleash the Power of Sound with Unisonic’s High-Performance Audio Power Amplifiers

To ensure that their products meet the highest quality standards, Unisonic follows several quality standards such as ISO-9001, ISO 14001, and IATF16949. They have quality-certified chip fabrication plants that allow them to maintain full control over production and the quality of their products. Unisonic is fully committed to quality management and constantly strives to improve its processes to provide customers with reliable solutions.

In addition to audio power amplifiers, Unisonic also offers a range of other analog ICs such as comparators, voltage translators, regulators, and transistor arrays. Their line of discrete components includes high and low-voltage MOSFETs, diodes, and more. These products are ideal for various industries and applications such as power management equipment, energy storage, commercial machinery, and photovoltaic inverters. Unisonic’s expertise in analog circuit design and manufacturing makes them a trusted choice for customers who require high-quality components for their products.








Part NumberPackage TypeSupply
Voltage Max
Output Power
(Bridge Tied Load)
TDA2003 TO-220B 28V 2 10W @ 16V 2Ω 20W @ 4Ω
PA2005 HZIP-11A 18V 2 10W @ 14.4V 2Ω 20W @ 4Ω
TDA1519C HSIP-9B 17.5V 2 11W @ 14.4V 2Ω 22W @ 4Ω
TEA2025 DIP-16 12V 2 2.3W @ 9V 4Ω 4.7W @ 8Ω
TDA2822 DIP-8 12V 2 0.65W @ 6V 2Ω 1.35W @ 4Ω
TDA7297 HZIP-15A 18V 2 10W @ 13V 8Ω
LM1875 TO-220B ±30V 1 25W @ ±25V 4Ω
TDA2030A TO-220B ±22V 1 18W @ ±16V 4Ω
TDA2030 TO-220B ±18V 1 14W @ ±16V 4Ω
LM386 SOP-8 12V 1 0.7W @ 9V 8Ω
Applications & Uses
Automotive Infotainment Systems

Unisonic’s audio power amplifiers are used for design applications that range from car radios to consumer goods. Some other applications include:

  • Home Theater systems
  • Audio Amplifiers and Sound Bars
  • Professional Audio Mixing Equipment
  • Public Announcement/Broadcasting Systems
  • Speakerphones
  • Automotive Infotainment Systems
  • Headphones
Amplifier Classes

Audio power amplifiers are categorized based on their internal operating principles and efficiency characteristics, each offering distinct advantages and limitations. While Unisonic concentrates on the balanced performance of Class AB amplifiers, here’s an overview of the most common classes you may encounter:

Class A: Renowned for their exceptional fidelity and minimal distortion, Class A amplifiers prioritize sound quality. However, their inherent inefficiency translates to high heat generation and power consumption, limiting their use in applications.

Class B: Offering significantly improved efficiency compared to Class A, Class B amplifiers utilize a push-pull topology. However, this design can introduce crossover distortion, a noticeable harshness in the sound, during transistor switching transitions.

Class AB: A balanced compromise between Class A and B, Class AB amplifiers deliver a blend of high fidelity and reasonable efficiency. This versatility makes them the dominant choice in consumer audio equipment.

Class D: Rising in popularity due to their exceptional efficiency and minimal heat generation, Class D amplifiers leverage pulse-width modulation for signal amplification. However, certain implementations can exhibit high-frequency roll-off and digital noise artifacts, impacting sound fidelity.

Benefits of Audio Power Amplifiers

Amplify Your Sound

Amplify Your Sound:
  • Power amps can deliver pristine audio fidelity, dynamic range, and clarity that integrated amps or source-driven setups can’t match. This is a game-changer for high-end audio systems where every nuance counts.

Flexibility and Control

Flexibility and Control:
  • Higher power translates to ear-splitting volume, perfect for public address systems or massive listening environments. Plus, engineers gain precise control over speaker impedance for optimal performance.

Creative Power Unleashed

Creative Power Unleashed:
  • Separate power amps unlock a world of customization. Choose your ideal preamp, speakers, and amp to craft a system that flawlessly aligns with your vision. Scaling to more channels or higher power becomes a breeze.
  • For audio engineers, power amps offer a vast toolbox for experimentation and achieving specific sonic goals. Whether it’s sound design, music production, or any other creative endeavor, the possibilities are endless.

Built to Last

Built to Last:
  • In some cases, separate power amps can be a budget-friendly alternative to high-end integrated amps offering similar power and features. Engineers can optimize component choices to fit their specific needs and avoid unnecessary bells and whistles.
  • Some power amp classes, like Class D, run cooler and more efficiently than integrated amps. This translates to less heat, happier components, and potentially longer lifespans, especially in cramped or poorly ventilated spaces.
  • Power amps are often built with robust components and modular designs, making them more reliable and easier to repair than their integrated counterparts. This is crucial for mission-critical applications and long-term project sustainability.

Ultimately, the decision to include a power amplifier depends on your individual needs and priorities. By weighing the benefits and potential drawbacks, you can make an informed decision about whether a dedicated power amplifier deserves a spot in your audio design.

Looking for more information or have some questions?
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