NE58633BS,115

Overview

The NE58633BS,115 is a stereo noise reduction class-D headphone driver amplifier. It operates from a single cell alkaline battery with a voltage range of 0.9 V to 1.7 V. The device integrates an on-chip DC-to-DC boost converter and internal voltage reference. Each channel includes a class-D BTL headphone driver, electret microphone low noise preamplifier, feedback noise reduction circuit, and music amplifier input. It drives 800 mVrms across 16 Ω or 32 Ω loads. The chip features mute control, plop and click reduction, ESD protection, and short-circuit protection. It is housed in a 32-pin HVQFN32 package.

Feature Summary

• Stereo class-D bridge-tied load headphone driver amplifier with integrated active noise reduction capabilities
• On-chip DC-to-DC boost converter enabling operation from a single cell battery (0.9 V to 1.7 V)
• Integrated electret microphone low noise preamplifier with external gain adjustment
• Built-in mute control and plop/click reduction circuitry for improved audio performance

Applications

• Active Noise Reduction (ANR) headphones using feedforward topology
• Active Noise Reduction (ANR) headphones using feedback topology
• Educational audio aids requiring noise reduction

Procurement Notes

Verify the specific ordering suffix '115' against official documentation to confirm tape and reel packaging details. Ensure compatibility with the specified 32-pin HVQFN32 package dimensions. Confirm that the component meets the required ambient temperature operating range of 0 °C to 70 °C for your application environment.

Selection Notes

Select this component for applications requiring low current consumption and high immunity to noise via differential architecture. It is suitable for designs powered by a single cell alkaline battery where space is constrained. Consider the external resistor requirements for setting microphone and filter amplifier gains when designing the circuit.

Part Context

The NE58633 is part of NXP's portfolio of audio amplifiers designed for portable consumer electronics. It specifically targets the noise-cancelling headphone market by combining power amplification with signal processing functions. The integration of the boost converter allows for extended battery life and simplified power supply design in compact devices.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

FAQ

How does the NE58633 handle pop and click noises during power-up?

The device incorporates dedicated plop and click reduction circuitry. A typical power-on delay time of 135 ms is imposed to allow input biasing to stabilize, which eliminates pop-on noise.

What is the function of the VREF pin?

The internal reference voltage is pinned out at VREF to allow external filtering with a capacitor to ground. This enhances noise performance by decoupling the reference voltage.

Can the NE58633 operate without its internal boost converter?

Yes, if operated without the boost converter, pins B_IN, PVDDL, and PVDDR may be powered directly from a 3 V source, such as two AAA alkaline batteries, and the VBAT pin would not be used.