PAM8403DR

Overview

The PAM8403DR is a filterless Class-D stereo audio amplifier manufactured by Diodes Incorporated, housed in an SOP-16 package. It delivers up to 3W output power at 10% THD+N with a 4Ω load and 5V supply. The device operates on a supply voltage range of 2.5V to 5.5V and features low quiescent current (16mA typical) and high efficiency up to 90%. Key electrical parameters include a THD+N of 0.15%, a closed-loop gain of 24dB, and a switching frequency of 260kHz. It incorporates short circuit protection and thermal shutdown.

Feature Summary

• Filterless architecture allows direct speaker driving without external low-pass filters, reducing system cost and PCB area.
• High efficiency design extends battery life compared to Class-AB amplifiers, making it suitable for portable applications.
• Integrated protection mechanisms include short circuit protection and thermal shutdown to prevent device damage.

Applications

• LCD Monitors
• TV Projectors
• Notebook Computers
• Portable Speakers
• Cellular Phones

Procurement Notes

Verify the component status before procurement as the datasheet indicates this part is not recommended for new designs. Confirm that the SOP-16 package matches your layout requirements. Ensure the application environment stays within the specified operating temperature range of -40°C to +85°C. Check for updated replacement recommendations from the manufacturer prior to finalizing orders.

Selection Notes

Select this component for portable audio systems requiring high efficiency and minimal external components. It is suitable for single-supply operation between 2.5V and 5.5V. Consider the SOP-16 package dimensions for board space constraints. Evaluate the need for EMI suppression using ferrite beads if speaker traces are long. Verify compatibility with the required load impedance and desired output power levels.

Part Context

The PAM8403 is a stereo Class-D audio amplifier designed for filterless operation. It offers high-quality sound reproduction with low distortion and noise. The device integrates mute and shutdown functions to control power consumption. It is intended for use in portable electronic devices where battery life and compact size are critical factors.

Replacement Considerations

The datasheet explicitly recommends using the PAM8406 as a replacement for new designs. The PAM8406 provides similar functionality but may offer improved performance characteristics or updated manufacturing processes. Verify pinout compatibility and electrical specifications when transitioning to the substitute part number.