SA58635UK,027

Overview

The SA58635UK is a stereo, class-G headphone driver amplifier manufactured by NXP Semiconductors. It features an integrated I2C-bus interface for digital volume control, independent channel enable, and mute functions. The device operates within a supply voltage range of 2.3 V to 5.5 V and delivers a minimum output power of 2 × 25 mW into 16 Ω or 32 Ω loads at THD+N = 1 %. It incorporates a buck converter for dynamic power management and an internal charge pump to eliminate DC blocking capacitors. The component provides high fidelity with a signal-to-noise ratio of 100 dB minimum and includes thermal shutdown and self-limiting current protection.

Feature Summary

• Class-G dynamic power management utilizing a buck converter to optimize efficiency across varying battery voltages.
• Integrated I2C-bus interface enabling digital volume control, independent channel mute, and software shutdown.
• Internal charge pump architecture removes the need for external DC blocking capacitors, reducing PCB footprint.
• High-fidelity audio performance supported by differential input topology for superior noise immunity.

Applications

• Wireless and cellular handsets
• Portable media players
• Portable DVD players
• Notebook PCs

Procurement Notes

Verify the specific ordering suffix UK against the manufacturer's current product status documentation. Confirm that the WLCSP16 package dimensions match the target PCB land pattern requirements. Ensure the design supports the required I2C bus electrical characteristics and pull-up resistor configurations as specified in the functional description section of the datasheet.

Selection Notes

Select this component for applications requiring low supply current and high power efficiency in portable devices. The integrated charge pump simplifies the bill of materials by eliminating external coupling capacitors. Verify that the system can accommodate the 1.7 mm x 1.7 mm WLCSP16 package constraints and that the I2C bus protocol aligns with the master controller capabilities.

Part Context

This part belongs to the NXP SA5863x series of audio amplifiers designed for mobile communication devices. It serves as a specialized solution for driving stereo headphones in space-constrained environments. The integration of class-G technology distinguishes it from standard linear or class-D drivers by offering improved battery life through dynamic voltage regulation.

Replacement Considerations

SA58635UK,012