PAM8303CAZN

Overview

The PAM8303CAZN is a mono Class-D audio power amplifier manufactured by Diodes Incorporated, housed in a 9-ball WCSP package. It delivers 3W output at 10% THD+N with a 4Ω load at 5V supply. The device operates on a single supply voltage ranging from 2.8V to 5.5V and features ultra-low EMI performance, exceeding FCC Class-B standards by 20dB at 300MHz. It incorporates differential inputs for high PSRR, shutdown current below 1µA, short circuit protection, and thermal shutdown.

Feature Summary

• Filterless architecture eliminates the need for external output LC filters, reducing PCB area and system costs.
• Ultra-low electromagnetic interference (EMI) design ensures compliance with strict regulatory standards.
• High power supply rejection ratio (PSRR) and differential input structure minimize noise and RF rectification.
• Integrated safety mechanisms include short circuit protection and thermal shutdown to ensure device reliability.

Applications

• Cellular phones and smart phones
• MP4 and MP3 players
• GPS navigation devices
• Digital photo frames
• Electronic dictionaries

Procurement Notes

Verify the specific ordering suffix 'A' corresponds to the 9-ball WCSP package configuration as documented in the manufacturer's ordering information table. Confirm that the component meets Pb-Free requirements and matches the standard tape and reel packaging specifications provided in the datasheet before finalizing procurement orders.

Selection Notes

Select this component for portable applications requiring high efficiency up to 90% and minimal external component count. Ensure the design accommodates the 2.8V to 5.5V supply range and utilizes the differential input structure to maximize noise immunity. Consider the space-saving WCSP package for devices with strict size constraints.

Part Context

The PAM8303C series includes variants such as PAM8303CBSC (MSOP-8), PAM8303BYC, and PAM8303CCYC (DFN3x3-8). The PAM8303CAZN specifically denotes the WCSP 9-pin package variant within this product line, offering distinct physical dimensions and thermal characteristics compared to the surface-mount options.

Replacement Considerations

Direct substitutes within the same package are not explicitly listed in the provided documentation. Cross-package replacements like PAM8303CBSC or PAM8303BYC require verification of pin compatibility and thermal management adjustments due to different package types.

FAQ

How does the PAM8303CAZN handle thermal overload?

The device features thermal shutdown protection that activates when the internal die temperature exceeds +135°C. The outputs are disabled until the temperature decreases by 30°C, after which normal operation resumes automatically.

What is the purpose of the SD pin on the PAM8303CAZN?

The SD (Shutdown) pin allows the user to minimize power consumption. Applying a logic low to this pin turns off the amplifier's bias circuitry, reducing the supply current to less than 1µA.