General Description

The MAX9746 mono Class D audio power amplifier provides Class AB amplifier performance with Class D efficiency, conserving board space and extending battery life. The MAX9746 is designed specifically for systems using 1.8V logic interface. Using a Class D architecture, the MAX9746 delivers 1.2W into an 8Ω load while offering efficiencies near 90. A low-EMI modulation scheme renders the traditional Class D output filter unnecessary.

Features

♦ Filterless Amplifier Passes FCC Radiated Emissions Standards with 100mm of Cable

♦ Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Conventional Methods

♦ Optional External SYNC Input

♦ Simple Master-Slave Setup for Stereo Operation

♦ 88 Efficiency

♦ 1.2W into 8Ω

♦ Low 0.1 THD+N

♦ High PSRR (72dB at 217Hz)

♦ Integrated Click-and-Pop Suppression

♦ 1.8V Logic-Compatible

♦ Low Quiescent Current (4mA)

♦ Low-Power Shutdown Mode (0.1µA)

♦ Short-Circuit and Thermal-Overload Protection

♦ Available in Thermally Efficient, Space-Saving 12-Bump UCSP Package (1.5mm x 2mm x 0.6mm)

Applications

    Cellular Phones

    PDAs

    MP3 Players

    Portable Audio