Powering from a lithium-ion battery, Maxim Integrated Products’ MAX9877 audio subsystem delivers 725 mW of output power from a 3.7 V supply into an 8 O load with a maximum efficiency of 85%. The device combines a mono Class D speaker amplifier, DirectDrive architecture, stereo headphone amplifier and bypass analog switch for Class AB audio performance with Class D efficiency. The 2.5 mm × 2 mm 20-bump WLP-packaged subsystem offers active-emissions limiting, spread-spectrum modulation, input mixing, volume control, click-and-pop suppression and input architecture with 3 preamplifier gain settings. The component operates with an I²C interface in a temperature range from -40°C to 85°C in cell phones and portable media players. Pricing starts at $1.62 in 1,000 quantities and up.
Maxim Integrated Products