PAM8404ZER

Overview

The PAM8404ZER is a filterless stereo Class-D audio amplifier manufactured by Diodes Incorporated. It operates on a supply voltage range of 2.5V to 5.5V and delivers up to 2.2W output power at 10% THD with a 4Ω load and 5V supply. The device features an efficiency of up to 85%, a switching frequency of 300kHz, and a shutdown current of less than 1µA. It utilizes a WCSP2x2-16 package.

Feature Summary

• Stereo Class-D architecture designed for high-efficiency audio amplification without external output filters.
• Integrated short-circuit protection and overtemperature protection to safeguard the device under fault conditions.
• Configurable gain settings via G0 and G1 pins, allowing selection between 6dB, 12dB, 18dB, and 24dB.
• Independent channel shutdown controls to minimize power consumption during idle states.

Applications

• Cellular handsets and speaker phones
• Portable speakers
• Notebook computers
• LCD monitors and TV projectors

Procurement Notes

Verify that the specific ordering suffix ZER corresponds to the WCSP2x2-16 package type as documented in the official datasheet. Confirm compliance with RoHS and halogen-free requirements if environmental standards are mandatory for your application. Ensure the design accommodates the recommended PCB layout guidelines for optimal thermal performance and EMI reduction.

Selection Notes

Select this component when space constraints require a compact WCSP package rather than the larger QFN option. Consider the lower maximum output power (2.2W vs 3W) compared to the QFN variant when designing for higher power applications. Verify that the required gain configuration aligns with the available pin settings and input impedance characteristics.

Part Context

This part belongs to the PAM8404 family of filterless stereo Class-D audio amplifiers from Diodes Incorporated. It shares core functional specifications with other variants like the PAM8404KGR but differs in physical packaging. The family is engineered for portable electronics requiring high efficiency and minimal external component count.

Replacement Considerations

PAM8404KGR serves as a direct alternative within the same product family, offering identical electrical functionality but housed in a U-QFN4040-20 package instead of the WCSP2x2-16 form factor. Designers must account for the difference in footprint and thermal dissipation characteristics when substituting.

FAQ

How is the amplifier gain configured?

Gain is set using the G0 and G1 pins, which allow for selectable closed-loop voltage gains of 6dB, 12dB, 18dB, or 24dB.

What protection mechanisms are included?

The device includes short-circuit protection on the outputs and overtemperature protection that activates when the junction temperature exceeds +150°C.