SA58670BS,115

Overview

The SA58670BS,115 is a stereo filter-free Class-D audio amplifier manufactured by NXP Semiconductors. It delivers 2.1 W per channel into a 4 Ω load at 5.0 V and 1.4 W per channel into an 8 Ω load at 5.0 V. The device operates on a supply voltage ranging from 2.5 V to 5.5 V. It 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. The package is HVQFN20 (SOT917-1) with dimensions of 4 mm × 4 mm × 0.85 mm.

Feature Summary

• Stereo Class-D architecture providing high power efficiency without external output filters
• Independent shutdown control for left and right channels to manage power consumption
• Configurable closed-loop voltage gain selectable between 6 dB and 24 dB
• Integrated thermal protection and short-circuit protection mechanisms

Applications

• Wireless and cellular handsets
• Portable DVD players
• USB speakers
• Notebook PCs
• Educational toys

Procurement Notes

Verify the specific ordering suffix '115' against current NXP documentation to confirm tape and reel specifications. Ensure the design accommodates the exposed Die Attach Paddle (DAP) in the HVQFN20 package for proper thermal dissipation and grounding. Confirm that the application schematic adheres to the recommended decoupling capacitor placement near PVDD pins to maintain performance.

Selection Notes

Select this component when a compact stereo audio solution is required for battery-operated devices. The low supply current and fast start-up time make it suitable for portable electronics. Consider the selectable gain options to match input signal levels. Verify that the PCB layout supports the exposed DAP for optimal heat transfer given the 24 K/W thermal resistance.

Part Context

The SA58670 belongs to NXP's line of Class-D audio amplifiers designed for space-constrained applications. It utilizes a PWM H-bridge topology for both left and right channels. The device integrates an internal oscillator and bias circuitry, reducing the need for external components compared to older amplifier designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet.