The APA3544KI is a high-efficiency, filter-free Class-D audio amplifier from Anpec. It's designed to deliver high-quality audio to speakers while minimizing power consumption. This makes it ideal for portable devices and other battery-powered applications.

Applications

• Portable Speakers
• Mobile Phones
• Tablets
• Gaming Devices
• Any battery-powered audio device

Features

• High Efficiency Class-D Operation: Maximizes battery life by reducing power dissipation.
• Filter-Free Modulation: Eliminates the need for external LC filters, reducing BOM cost and PCB space.
• Low THD+N: Provides clean and clear audio reproduction with minimal distortion.
• Adjustable Gain: Allows for flexible gain settings to accommodate various input signal levels.
• Short Circuit Protection: Protects the amplifier from damage due to short circuits at the output.
• Thermal Shutdown Protection: Prevents overheating by automatically shutting down the amplifier when the temperature exceeds a safe limit.
• Under Voltage Lockout (UVLO): Ensures proper operation by disabling the amplifier when the supply voltage is too low.
• Available in a compact package: Suitable for space-constrained applications.

Benefits

• Longer Battery Life: High efficiency translates to extended playtime for portable devices.
• Reduced BOM Cost: Filter-free operation eliminates the need for costly external components.
• Improved Audio Quality: Low distortion ensures a clear and enjoyable listening experience.
• Enhanced System Reliability: Robust protection features safeguard the amplifier from damage and ensure reliable operation.
• Smaller PCB Footprint: Compact package allows for integration into smaller devices.

Additional Details

The APA3544KI operates from a single power supply, typically in the range of 2.5V to 5.5V. It is capable of delivering up to 2.8W into a 4Ω load at 5V. The filter-free modulation scheme simplifies the design process and reduces the overall system cost. The adjustable gain feature allows the user to optimize the amplifier's performance for different input signal levels. The amplifier also features comprehensive protection circuitry, including short circuit protection, thermal shutdown protection, and under voltage lockout (UVLO), to ensure reliable operation. The KI in the part number refers to the specific package type. Refer to the datasheet for detailed specifications and application information.