PAM8302AADCR_03

Overview

The PAM8302AADCR is a 2.5W Class-D mono audio amplifier manufactured by Diodes Incorporated, housed in an 8-SOP package. It operates on a single supply voltage ranging from 2V to 5.5V and delivers up to 2.5W of output power into a 4-ohm load at 10% THD with a 5V supply. The device features a filterless architecture that allows direct speaker driving without low-pass filters, reducing system cost and PCB area. It includes short circuit protection, thermal shutdown, and low quiescent current for optimized battery life.

Feature Summary

• Filterless architecture enables direct speaker drive without external low-pass filters
• High efficiency up to 88% optimizes battery life for portable applications
• Integrated short circuit protection and thermal shutdown ensure operational safety
• Low quiescent current and low EMI characteristics support energy-efficient designs

Applications

• Portable media players (PMP/MP4)
• GPS navigation systems
• Portable speakers
• Two-way radios
• Hands-free and speaker phones

Procurement Notes

Verify the specific suffix 'A' indicates the SO-8 package variant when sourcing. Confirm RoHS3 compliance and halogen-free status requirements against project specifications. Ensure input capacitors are selected within the recommended range to maintain low-frequency performance and minimize DC offset. Validate thermal management strategies given the junction-to-ambient resistance values for the SO-8 package.

Selection Notes

Select this component for applications requiring high-efficiency audio amplification in space-constrained portable devices. The filterless design reduces bill-of-materials costs compared to traditional Class-AB amplifiers. Consider the 8-SOP package dimensions for PCB layout constraints. Evaluate the need for external input capacitors to set the high-pass filter corner frequency based on desired bass response.

Part Context

The PAM8302A series includes variants in MSOP-8, SO-8, and U-DFN3030-8 packages. The PAM8302AADCR specifically denotes the SO-8 surface-mount version. This family is designed to replace Class-AB amplifiers in portable electronics where size, cost, and battery efficiency are critical factors. The device maintains consistent electrical performance across package types while offering different thermal dissipation characteristics.

Replacement Considerations

Direct replacements include other PAM8302A variants such as PAM8302AASCR (MSOP-8) or PAM8302AAYCR (U-DFN3030-8), provided pin compatibility and thermal requirements are met. Verify that substitute components offer equivalent filterless operation and protection features.

FAQ

Does the PAM8302AADCR require an external low-pass filter?

No, the PAM8302AADCR utilizes a filterless architecture that allows it to drive speakers directly without the need for external low-pass output filters.

What is the maximum output power capability?

The device can deliver up to 2.5W of output power into a 4-ohm load with 10% THD+N when powered by a 5V supply.

How does the shutdown feature function?

Applying a logic low signal to the SD (Shutdown) pin turns off the amplifier, minimizing supply current draw during idle mode to reduce power consumption.