The SA5668, manufactured by Silan, is a monolithic integrated circuit designed for use as a low-voltage audio power amplifier. It is characterized by its ability to deliver significant power output with a minimum of external components, making it suitable for a variety of portable and low-power audio applications.

Applications

• Portable audio players (MP3 players, CD players)
• Wireless speakers
• Mobile phones and smartphones
• Laptop and notebook computers
• Gaming consoles and handheld devices
• Toys and educational devices with audio output

Features

• High Power Output: Delivers typically 2.5W into a 4Ω load at 5V supply.
• Low THD+N: Features low total harmonic distortion plus noise, ensuring high-fidelity audio reproduction.
• Integrated Short-Circuit Protection: Includes built-in protection against short circuits at the output, preventing damage to the amplifier.
• Thermal Shutdown Protection: Incorporates thermal shutdown circuitry that automatically disables the amplifier when the junction temperature exceeds a safe limit, protecting it from overheating.
• Low Quiescent Current: Exhibits low quiescent current consumption, extending battery life in portable applications.
• Wide Supply Voltage Range: Operates over a wide supply voltage range, typically from 2.5V to 5.5V, providing flexibility in power supply design.
• Shutdown Mode: Offers a shutdown mode that significantly reduces current consumption when the amplifier is not in use, further extending battery life.
• Minimal External Components: Requires only a few external components for operation, simplifying circuit design and reducing board space.
• Pb-Free Packaging: Available in lead-free packaging, complying with RoHS environmental standards.

Benefits

• Enhanced Audio Performance: Provides clear and powerful audio output, improving the user experience in audio applications.
• Reliable Operation: Robust protection features such as short-circuit and thermal shutdown ensure reliable operation under various conditions.
• Extended Battery Life: Low quiescent current and shutdown mode contribute to extended battery life in portable devices.
• Simplified Design: Minimal external component requirements simplify circuit design and reduce board space, saving costs and time.
• Compact Solution: Small package size allows for integration into space-constrained applications.
• Cost-Effective: Offers a cost-effective solution for audio amplification needs in various consumer electronics applications.

Technical Specifications

The SA5668 typically operates from a supply voltage of 2.5V to 5.5V. It can deliver a power output of 2.5W into a 4Ω load at 5V with a typical THD+N of less than 1%. The quiescent current is typically around 2mA. The amplifier features a gain that can be adjusted with external resistors. The device is available in a small surface-mount package such as SOP-8, which is well-suited for high-density PCB layouts.

For detailed specifications, application notes, and design considerations, refer to the official Silan datasheet for the SA5668.