PAM8904QJER

Product Overview

Category

PAM8904QJER belongs to the category of integrated circuits (ICs) specifically designed for audio amplification.

Use

This product is primarily used for amplifying audio signals in various electronic devices such as smartphones, tablets, laptops, and portable media players.

Characteristics

• Compact size: The PAM8904QJER is designed to be small and lightweight, making it suitable for space-constrained applications.
• Low power consumption: It operates efficiently with low power consumption, ensuring longer battery life for portable devices.
• High efficiency: The amplifier offers high efficiency, resulting in minimal power loss during signal amplification.
• Wide voltage range: It can operate within a wide voltage range, making it compatible with different power supply systems.
• Thermal protection: The PAM8904QJER incorporates thermal protection mechanisms to prevent overheating and ensure safe operation.

Package

The PAM8904QJER is available in a compact surface-mount package, which facilitates easy integration into electronic devices. The package type is typically QFN (Quad Flat No-leads), ensuring reliable electrical connections.

Essence

The essence of PAM8904QJER lies in its ability to provide efficient and high-quality audio amplification in a compact form factor, catering to the needs of modern portable electronic devices.

Packaging/Quantity

The product is usually supplied in reels or trays, depending on the manufacturer's packaging standards. The quantity per reel or tray may vary, but it is commonly available in quantities of 250 or 1000 units.

Specifications

• Supply Voltage Range: 2.5V - 5.5V
• Output Power: Up to 1.5W
• Efficiency: >90%
• Total Harmonic Distortion (THD): <0.1%
• Operating Temperature Range: -40°C to 85°C
• Package Type: QFN

Detailed Pin Configuration

The PAM8904QJER has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. VDD: Power supply input
2. GND: Ground reference
3. SD: Shutdown control input
4. INL: Left channel audio input
5. INR: Right channel audio input
6. BYP: Bypass capacitor connection
7. PGND: Power ground
8. OUTL: Left channel audio output
9. OUTR: Right channel audio output
10. BST: Boost capacitor connection
11. FB: Feedback input
12. AGND: Analog ground
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• Class D Amplification: The PAM8904QJER utilizes Class D amplification technology, which offers high efficiency and low power consumption.
• Shutdown Control: It features a shutdown control input (SD) that allows the amplifier to be turned on or off as required, conserving power when not in use.
• Short Circuit Protection: The amplifier incorporates short circuit protection mechanisms to prevent damage to the device or connected speakers in case of a fault.
• Thermal Protection: The PAM8904QJER includes thermal protection circuits that monitor the temperature and automatically reduce power or shut down if overheating occurs.

Advantages and Disadvantages

Advantages

• Compact size enables easy integration into portable electronic devices.
• Low power consumption extends battery life.
• High efficiency minimizes power loss during signal amplification.
• Wide voltage range compatibility.
• Thermal protection ensures safe operation.

Disadvantages

• Limited output power compared to larger audio amplifiers.
• May not be suitable for high-power audio applications.

Working Principles

The PAM8904QJER operates based on Class D amplification principles. It converts the incoming analog audio signals into a pulse-width modulated (PWM) signal, which is then amplified using power MOSFETs. This PWM signal is reconstructed back into an analog audio signal through a low-pass filter, resulting in amplified audio output.

Detailed Application Field Plans

The PAM8904QJER finds application in various electronic devices where compact size and efficient audio amplification are crucial. Some potential application fields include:

1. Mobile Phones: Enhancing audio output quality in smartphones.
2. Tablets: Providing improved audio performance in tablets.
3. Laptops: Amplifying audio signals for better sound quality in laptops.
4. Portable Media Players: Enabling high-quality audio playback in portable media players.

Detailed and Complete Alternative Models

1. PAM8403: A similar audio amplifier IC with dual-channel output and higher output power.
2. TPA3116D2: A more powerful audio amplifier IC suitable for home audio systems.
3. MAX983