Class G speaker amplifier strengthens output power, increases battery life

Sunnyvale, Calif. — Maxim Integrated Products introduced the MAX9730, a 2.4 W, single-supply, mono, Class G speaker amplifier. The MAX9730's Class G architecture and integrated charge-pump power supply enable this device to deliver two times more output power than conventional Class AB or Class D speaker amplifiers provide from a lithium-ion (Li+) battery. The charge pump can deliver up to 500 mA over a 2.7 V to 5.5 V supply-voltage range, guaranteeing up to 2.4 W into an 8 Ω load from a 3.3 V supply. The MAX9730 reduces the size and cost of the total solution by eliminating the boost converter and large inductor commonly needed to achieve the same performance; this makes it a good fit for cellular phones, notebook computers and other portable applications in which board space is limited.

The MAX9730 maximizes battery life by using a proprietary output stage whichprovides efficiency levels greater than Class AB devices, without the EMI penalties commonly associated with Class D amplifiers. Additionally, this device features short-circuit and thermal-overload protection, comprehensive click-and-pop suppression, shutdown control and soft-start circuitry. The MAX9730 is fully specified over the -40°C to 85°C extended temperature range.

Availability: Now
Pricing: Begins at $0.80 each in 1,000-piece quantities
Data Sheet:

Maxim, 408-737-7600,

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