MAX9725BEBC+

Audio Amplifiers Overview

The MAX9725BEBC+ is a fixed-gain, stereo headphone amplifier utilizing DirectDrive architecture to produce ground-referenced outputs from a single supply. It operates on a 0.9V to 1.8V voltage range with a typical quiescent current of 2.1mA. The device delivers up to 20mW per channel into a 32Ω load and achieves 0.006% THD+N. It features integrated click-and-pop suppression, ±8kV ESD protection, and a low-power shutdown mode reducing current to 0.6µA. The component is housed in a 12-bump UCSP package.

Audio Amplifiers Feature Summary

• DirectDrive architecture eliminates the need for large DC-blocking output capacitors by generating a negative internal supply via an inverting charge pump.
• Fixed gain configuration (-1.5V/V) removes the requirement for external feedback resistors, minimizing board space and component count.
• Comprehensive click-and-pop suppression circuitry prevents audible transients during power-up and shutdown transitions.
• Integrated short-circuit protection and ±8kV ESD protection on headphone outputs ensure robust operation in portable environments.

Audio Amplifiers Applications

• MP3 Players
• Cellular Phones
• PDAs
• Smart Phones
• Portable Audio Equipment

Audio Amplifiers Procurement Notes

Verify the specific suffix BEBC+ corresponds to the 12-bump UCSP package with -1.5V/V fixed gain as documented in the ordering information. Confirm RoHS compliance status and lead-free specifications against the manufacturer's latest documentation before integration. Ensure the design accommodates the required flying capacitor connections for the charge pump functionality.

Audio Amplifiers Selection Notes

Select this model when a fixed -1.5V/V gain is sufficient for the application, avoiding the complexity of external feedback networks found in adjustable variants. Consider the UCSP package dimensions if board space is critical compared to the thin QFN option. Verify that the single-cell battery voltage range aligns with the system's power supply requirements.

Audio Amplifiers Part Context

This component belongs to the MAX9725 family of low-power, DirectDrive stereo headphone amplifiers. The series includes variants with different fixed gains (MAX9725A, C, D) and an adjustable gain version (MAX9725E). All models share the same core architecture designed for portable audio applications requiring high performance in minimal space.

Audio Amplifiers Replacement Considerations

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

Audio Amplifiers FAQ

How does the DirectDrive architecture affect low-frequency response?

By eliminating large DC-blocking output capacitors, the DirectDrive architecture prevents the low-frequency attenuation and distortion typically caused by capacitor voltage coefficients and high-pass filter cutoff points.

What is the function of the PVSS pin?

PVSS is the inverting charge-pump output that creates a negative power supply relative to VDD, allowing the amplifier outputs to be biased about ground without external coupling capacitors.