Maxim MAX98502 Class D Audio Amplifier
Maxim Integrated MAX98502 high-efficiency 2.2W Class D Audio Amplifier 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 (2.2µH) 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 MAX98502 also features three gain settings (6dB, 15.5dB, and 20dB) that are selectable with a logic input. MAX98502 evaluation kit (EV kit) is a fully assembled and tested circuit board that uses the MAX98502 boosted Class D amplifier to drive a mono bridge-tied-load speaker in portable audio applications.