PAM8304ASR

Overview

The PAM8304ASR is a mono, filter-less Class-D audio amplifier manufactured by Diodes Incorporated. It operates on a supply voltage range of 2.8V to 6.0V and delivers up to 3.0W output power at 10% THD with a 5V supply and 4Ω load. The device features high efficiency reaching 90%, differential input for noise reduction, and shutdown current below 1μA. It includes short-circuit protection, thermal shutdown, and undervoltage lockout. Available in MSOP-8 packages, it supports speaker loads as low as 3Ω.

Feature Summary

• Filter-less architecture minimizes external components and PCB area while maintaining high performance.
• Differential input configuration effectively eliminates common-mode noise interference.
• Integrated protection mechanisms include short-circuit protection, thermal shutdown, and undervoltage lockout.
• Anti-pop and anti-click circuitry minimizes turn-on and turn-off transients.

Applications

• MP4/MP3 players
• GPS navigation systems
• Set-top boxes
• Tablets and digital photo frames
• Portable game machines

Procurement Notes

Verify the specific package variant (MSOP-8) against the required board layout dimensions. Confirm that the application environment remains within the recommended operating temperature range of -40°C to +85°C. Ensure proper decoupling capacitors are placed near the VDD pin to maintain signal integrity and prevent oscillations during operation.

Selection Notes

Select this component when space constraints require a filter-less design or when battery life optimization is critical due to its high efficiency. It is suitable for portable devices powered by single-cell lithium-ion batteries or alkaline battery packs. Verify that the load impedance meets the minimum 3Ω requirement to ensure stable operation and maximum power delivery.

Part Context

The PAM8304ASR belongs to the PAM8304 series of mono Class-D audio amplifiers from Diodes Incorporated. This series is designed for portable consumer electronics requiring high sound quality in a compact form factor. The 'ASR' suffix specifically denotes the MSOP-8 surface-mount package with tape-and-reel packing, distinguishing it from other package options like U-DFN3030-8.

Replacement Considerations

Direct substitutes within the same family include PAM8304AYR, which utilizes the U-DFN3030-8 package instead of MSOP-8. When replacing, verify that the new package footprint matches the existing PCB design. Electrical characteristics remain consistent across package variants, but thermal dissipation properties may differ slightly based on the package type.