General Description

The MAX9879 combines a high-efficiency stereo Class D audio power amplifier with a stereo capacitor-less DirectDrive? headphone amplifier. Maxim’s filterless class D amplifiers with active emissions limiting technology provide Class AB performance with Class D efficiency.

The Class D power amplifier delivers up to 715mW from a 3.7V supply into an 8Ω load with 88 efficiency to extend battery life. The filterless modulation scheme combined with active emission limiting circuitry and spread-spectrum modulation greatly reduces EMI while eliminating the need for output filtering used in traditional Class D devices.

Features

? Better than 9dB Margin Under EN 55022 Class B

?? Limits with No Filter Components

? Low RF Susceptibility Design Rejects TDMA

?? Noise from GSM Radios

? Input Mixer with User Defined Input Mode

? Stereo 715mW Speaker Output (RL = 8Ω,

?? VDD = 3.7V)

? Stereo 58mW Headphone Output (16Ω,

?? VDD = 3.7V)

? Low 0.04 THD+N at 1kHz (Class D Power

?? Amplifier)

? Low 0.018 THD+N at 1kHz (Headphone

?? Amplifier)

? 88 Efficiency (RL = 8Ω, POUT = 750mW)

? 1.6Ω Analog Switch for Speaker Amplifier Bypass

? High Speaker Amplifier PSRR (72dB at 217Hz)

? High Headphone Amplifier PSRR (84dB at 217Hz)

? I2C Control

? Hardware and Software Shutdown Mode

? Ultra-Low Click and Pop

? Robust Design with Current and Thermal

?? Protection

? Available in Space-Saving Package

?? 5x6 UCSP (2.5mm x 3mm)

Applications

?? Cell Phones

?? Portable Multimedia Players