PAM8403
Compact 3W stereo Class-D audio amplifiers for low-voltage applications
Manufacturer： ['diodes', 'diodeszetex']
series introduction
# PAM8403 Product Series Introduction
## 1. Overview
The PAM8403 product series is a remarkable line of audio amplifier integrated circuits (ICs) that have gained significant popularity in the field of audio electronics. These amplifiers are designed to provide high - quality audio amplification in a compact and efficient package, making them suitable for a wide range of applications.
## 2. Key Features
### 2.1 High Efficiency
One of the standout features of the PAM8403 series is its high efficiency. These amplifiers typically operate in a Class D amplifier topology. Class D amplifiers are known for their ability to convert a large percentage of the input power into output power, minimizing power loss in the form of heat. This high efficiency not only reduces energy consumption but also allows the amplifier to operate in a cooler state, which can extend the lifespan of the components and improve overall reliability.
### 2.2 Compact Size
The PAM8403 ICs are designed with a small form factor. This makes them ideal for applications where space is limited, such as portable audio devices, small speakers, and earbud amplifiers. Their compact size does not compromise on performance, as they are still capable of delivering a decent amount of audio power.
### 2.3 Low Distortion
The series offers low total harmonic distortion (THD). THD is a measure of how much the output signal of an amplifier deviates from the input signal. A low THD value indicates that the amplifier can reproduce the original audio signal with high fidelity, resulting in clear and accurate sound. This is crucial for applications where audio quality is of utmost importance, such as in high - end headphones or home audio systems.
### 2.4 Wide Supply Voltage Range
The PAM8403 amplifiers can operate over a wide supply voltage range. This flexibility allows them to be used with different power sources, such as batteries or regulated power supplies. For example, they can work with a single - cell lithium - ion battery or a multi - cell battery pack, making them suitable for both portable and stationary audio applications.
### 2.5 Built - in Protection Circuits
To ensure the safety and reliability of the amplifier and the connected audio devices, the PAM8403 series is equipped with built - in protection circuits. These circuits can protect against over - current, over - temperature, and short - circuit conditions. In the event of an abnormal condition, the protection circuits will automatically shut down the amplifier or limit the output power to prevent damage to the components.
## 3. Technical Specifications
### 3.1 Output Power
The output power of the PAM8403 series can vary depending on the specific model and the operating conditions. Generally, it can deliver several watts of power per channel. For example, in a typical application with a suitable power supply and load impedance, it can provide 2 - 3 watts of output power per channel, which is sufficient to drive small to medium - sized speakers.
### 3.2 Frequency Response
The frequency response of the PAM8403 amplifiers is designed to cover the audible frequency range. It typically has a flat frequency response from 20 Hz to 20 kHz, which is the standard range for human hearing. This ensures that the amplifier can accurately reproduce all the frequencies in the audio signal, from the deep bass to the high - pitched treble.
### 3.3 Input Impedance
The input impedance of the PAM8403 is relatively high. A high input impedance allows the amplifier to interface easily with different audio sources, such as audio players, smartphones, and laptops, without loading the source and causing signal degradation.
### 3.4 Signal - to - Noise Ratio (SNR)
The SNR of the PAM8
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