Stereo 3.7W Class D Amplifier

The MAX98306 stereo 3.7W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (6dB, 9dB, 12dB, 15dB, and 18dB) set by a single gain-select input (GAIN).

Active emissions limiting, edge-rate, and overshoot control circuitry combined with a filterless spread-spectrum modulation scheme (SSM) provide excellent EMI performance while eliminating the need for output filtering found in traditional Class D devices. These features reduce application component count.

The IC's 2.0mA quiescent current with a 3.7V supply extends battery life in portable applications.

The IC is available in a 14-pin TDFN (3mm x 3mm x 0.75mm) package specified over the extended -40°C to +85°C temperature range.

Applications

* Accessory Speakers * Cellular Phones * MP3 Players * Portable Audio Players * Smartphones * Tablets * VoIP Phones

* Output Power 3.7W at 3Ω, 10% THD, 1.7W at 8Ω, 10% THD, with 5V Supply

* Passes EMI Limit Unfiltered with Up to 12in of Speaker Cable

* High 83dB PSRR at 217Hz

* Spread-Spectrum Modulation and Active Emissions Limiting

* Five Pin-Selectable Gains

* Excellent Click-and-Pop Suppression

* Thermal and Overcurrent Protection

* Low-Current Shutdown Mode

* Space-Saving, 3mm x 3mm x 0.75mm, 14-Pin TDFN