MAX98500 Datasheet | Maxim Integrated

.. 19-5189; Rev 0; 5/10 Boosted 2.2W Class D Amplifier with Automatic Level Control General Description The MAX98500 is a high-efficiency, Class D audio amplifier that Features an integrated boost converter to deliver a constant output power over a wide range of battery supply voltages. The boost converter operates at 2MHz, requiring only a small (2.2FH) external inductor and capacitor. The automatic level control has a battery tracking function that reduces the output swing as the supply voltage drops, preventing collapse of battery voltage. The amplifier has differential inputs and an internal fully differential design. The MAX98500 also Features three gain settings (6d B, 15.5d B, and 20d B) that are selectable with a logic input. The MAX98500 is available in a small, 0.5mm pitch 16-bump WLP package (2.1mm x 2.1mm). It is specified over the extended -40NC to +85NC temperature range. S Boosted Class D Output S Integrated Automatic Level Control S Output Power 2.2W into 8I, 10% THD+N 1.7W into 8I, 1% THD+N S Wide 2.5V to 5.5V Supply Voltage Range S Undervoltage Lockout Protection S High Total Efficiency of 87% S High Step-Up Switching Frequency (2MHz) S Active Emission Limiting for Low EMI Features Applications Cell Phones Smartphones GPS Devices Mobile Internet Devices Active Speaker Accessories PART Ordering Information TEMP RANGE PIN-PACKAGE MAX98500EWE+ 16 WLP -40NC to +85NC +Denotes a lead(Pb)-free/Ro HS-pliant package. Typical Application Circuit appears at end of data sheet. Simplified Block Diagram BATTERY VBAT B4 SDBST D4 SDSPK C3 GAIN B2 RKNEE B3 CONTROL A3 BOOST CONVERTER A2 LX VCCOUT A1 PVDD INP D2 INN D3 B1 SPKP DIFFERENTIAL INPUT C4 AGND A4 BSTPGND GAIN D1, C2 SPKPGND OUTPUT STAGE C1 SPKN ________________________________________________________________ Maxim Integrated Products   1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s...