EVALUATION KIT AVAILABLE MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier General Description Benefits and Features The MAX98307/MAX98308 fully differential mono Class High Efficiency Combined with High Output Power DG multilevel power amplifiers with integrated inverting Class DG Multilevel Modulation Ensures Maximum charge pumps offer highly efficient, high-power audio Efficiency Over Wide Output Power Range solutions for portable applications. Improves Battery Life Class DG multilevel modulation extends the dynamic Low 1.85mA Quiescent Current range of the output signal by employing a charge-pump- High Output Power at 1% THD+N generated negative rail as needed to extend the supply 1.54W at V = 3.6V, 8 + 68H Load PVDD range. This scheme results in high efficiency over a wide 2.85W at V = 5V, 8 + 68H Load PVDD output power range. High Output Power at 10% THD+N The ICs combine Maxims active emissions limiting edge 1.77W at V = 3.6V, 8 + 68H Load PVDD rate and overshoot control circuitry with multilevel output 3.3W at V = 5V, 8 + 68H Load PVDD modulation to greatly reduce EMI. These features elimi- 84% Efficiency (V = 3.6V, at 500mW Output) PVDD nate the need for output filtering as compared to tradition- Active Emissions Limiting and Class DG Multilevel al Class D devices, reducing component count and cost. Output Modulation Eliminates EMI Output Filtering The MAX98307s 16-pin TQFN package features an Requirement adjustable gain set by external resistors. The MAX98308s Integrated Charge Pump and High Efficiency Results space-saving 12-bump WLP package features an inter- in Small Solution Size nally fixed gain of 8.5dB, 11.5dB, 14.5dB, 17.5dB, and 20.5dB set by a single gain input. Both devices operate Excellent RF Immunity over the extended -40C to +85C temperature range. Click-and-Pop Suppression Thermal and Overcurrent Protection Applications Cellular Phones VoIP Phones Low-Current Shutdown Mode Smartphones Portable Audio Ordering Information appears at end of data sheet. Notebook Computers Tablet PCs Simplified Block Diagrams V SHDN CC PVDD PVSS SVSS GAIN SHDN PVDD PVSS C1P FB+ C1P CHARGE PUMP C1N MAX98308 MAX98307 CHARGE PUMP C1N OUT+ IN+ OUT+ IN+ CLASS DG AMPLIFIER CLASS DG IN- OUT- AMPLIFIER OUT- IN- FB- GND PGND GND PGND 19-5848 Rev 6 6/16MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier MAX98307 Typical Application Circuit 2.6V TO 5.25 0.1F 10F* 0.1F 10F V SHDN CC PVDD SVSS PVSS 1 13 3 7 14 16 C1P FB+ 12 CHARGE PUMP 4.7F 15 C1N 20k MAX98307 0.33F 10k IN+ 11 4 OUT+ CLASS DG 0.33F 10k AMPLIFIER 10 IN- 5 OUT- 20k 8 N.C. FB- 9 2 6 GND PGND *SYSTEM BULK CAPACITOR MAX98308 Typical Application Circuit 2.6V TO 5.25 10F* 0.1F 10F SHDN PVDD PVSS B2 A3 C1 MAX98308 A1 C1P GAIN B3 4.7F CHARGE PUMP B1 C1N 0.33F IN+ C2 A4 OUT+ CLASS DG 0.33F AMPLIFIER C3 IN- B4 OUT- A2 C4 GND PGND *SYSTEM BULK CAPACITOR Maxim Integrated 2 www.maximintegrated.com