SA58671UK,027

Overview

The SA58671UK,027 is a stereo filter-free Class-D audio amplifier manufactured by NXP Semiconductors. It operates on a single supply voltage ranging from 2.5 V to 5.5 V and delivers 1.3 W per channel into an 8 Ω load at 5 V, or 1.2 W per channel into a 4 Ω load at 5 V. The device features independent shutdown controls for each channel and selectable gain settings of 6 dB, 12 dB, 18 dB, or 24 dB via G0 and G1 pins. It utilizes a 16-bump Wafer Level Chip-Size Package (WLCSP) measuring 2.06 mm × 2.11 mm × 0.6 mm.

Feature Summary

• Stereo Class-D architecture with differential input topology for improved noise immunity and RF rectification rejection.
• Independent active-low shutdown control for left and right channels to minimize power consumption.
• Configurable closed-loop voltage gain selectable between 6 dB, 12 dB, 18 dB, and 24 dB using external logic pins.
• Integrated thermal protection and short-circuit protection mechanisms to safeguard the device during fault conditions.

Applications

• Wireless and cellular handsets
• Personal Digital Assistants (PDAs)
• Portable DVD players
• USB speakers
• Notebook PCs

Procurement Notes

Verify component authenticity through authorized NXP distributors or certified partners. Confirm package integrity as the WLCSP format requires careful handling during reflow soldering. Check for lead-free compliance and RoHS status in current documentation. Ensure design compatibility with the specified operating temperature range and supply voltage limits before integration.

Selection Notes

Select this amplifier for applications requiring high efficiency and minimal external components due to its filter-free operation. Consider the low junction-to-ambient thermal resistance when designing PCB heat spreading. Verify that the chosen gain setting matches the input signal requirements and that the load impedance aligns with the desired output power specifications.

Part Context

This component belongs to the SA58671 series of stereo audio amplifiers. It is designed for portable electronics where space constraints and battery life are critical. The WLCSP packaging allows for significant board area savings compared to traditional packages, making it suitable for compact mobile devices.

Replacement Considerations

Public confirmed substitute part numbers: None identified in official documentation.

FAQ

Does the SA58671 require external output filters?

No, the SA58671 is a filter-free Class-D amplifier. However, ferrite bead filters may be used if EMI reduction is required for frequencies above 1 MHz.

How is the gain of the amplifier configured?

The gain is set using the G0 and G1 pins. Logic levels applied to these pins select one of four gain options: 6 dB, 12 dB, 18 dB, or 24 dB.

What is the typical startup time after exiting shutdown mode?

The delay time from shutdown to startup is typically 3.5 ms when operating at a supply voltage of 3.6 V.