PAM8303DBSC

Overview

The PAM8303DBSC is a mono Class-D audio power amplifier manufactured by Diodes Incorporated, housed in an MSOP-8 surface-mount package. It delivers 3W output power at 10% THD+N with a 4Ω load and 5V supply. The device operates on a single supply voltage ranging from 2.8V to 5.5V. Key electrical characteristics include a shutdown current of less than 1µA, peak efficiency up to 90%, and a switching frequency between 300kHz and 380kHz. It features differential inputs, high PSRR, and integrated short circuit and thermal protection.

Feature Summary

• Filterless architecture eliminates the need for external output LC filters, reducing component count and PCB area.
• Ultra-low EMI performance exceeds FCC Class-B standards by 20dB at 300MHz.
• High power supply ripple rejection (PSRR) and differential input structure minimize noise and RF rectification.
• Integrated protection mechanisms include short circuit protection and thermal shutdown.

Applications

• Cellular phones and smart phones
• MP4/MP3 media players
• GPS navigation systems
• Digital photo frames and electronic dictionaries
• Portable game machines

Procurement Notes

Verify the specific ordering suffix 'BSC' corresponds to the MSOP-8 package variant when sourcing. Confirm RoHS compliance and halogen-free status requirements against project specifications. Ensure the design accommodates the recommended operating temperature range of -40°C to +85°C. Check for any end-of-life notices or replacement recommendations provided by the manufacturer for this specific revision.

Selection Notes

Select this component for portable applications requiring high efficiency and minimal external components. The filterless design simplifies layout but requires careful attention to decoupling capacitor placement near VDD and PVDD pins. Consider the MSOP-8 package dimensions for space-constrained boards. Ensure input resistor matching is maintained to optimize CMRR and reduce distortion.

Part Context

The PAM8303D series represents Diodes Incorporated's solution for ultra-low EMI audio amplification in mobile devices. The DBSC suffix specifically denotes the MSOP-8 package option within this family. This series targets consumer electronics where battery life and board real estate are critical constraints, offering a balance of high output power and low quiescent current.

Replacement Considerations

The datasheet explicitly states that the U-DFN3030-8 package version is not recommended for new designs and advises using the PAM8304 instead. For the MSOP-8 package, no direct official substitute is listed in the provided documentation.

FAQ

How does the PAM8303DBSC handle electromagnetic interference?

It features ultra-low EMI performance, measuring -20dB better than FCC Class-B standards at 300MHz, which helps prevent interference with radio frequencies in mobile devices.

What is the purpose of the SD pin?

The SD (Shutdown) pin allows the user to turn off the amplifier's bias circuitry to minimize supply current draw during idle mode. A logic low signal activates the shutdown state.

Does the PAM8303DBSC require an external output filter?

No, it utilizes a filterless architecture that drives speakers directly without external LC filters, thereby reducing system cost and PCB area.