Diodes Incorporated has introduced their new Piezo Sounder Driver IC PAM8906, with Self-excitation and increased sound pressure level (SPL). It features an integrated synchronous boost converter and can be operated either with external pulse-width modulation (PWM) input or in self-excitation mode. This provides greater application flexibility and allows support for an increased variety of sounders. This driver also integrates functionality that prolongs its battery-powered operation. Key applications for the device include smoke/gas/water alarms, air humidifiers, handheld GPS devices, industrial security alarms, medical devices, and home appliances.
The internal boost converter switches at a fixed frequency of 1.8MHz frequency, enables the use of small auxiliary components and thus presents engineers with a solution that takes up significantly less board space and has a reduced bill of materials (BOM). It also features low quiescent current and automatic shutdown or wake-up functionality to extend the operational lifespan in battery-powered applications.
The PAM8906 sounder driver from Diodes is supplied in a 10-pin MSOP package and is available at $0.37 each in 1,000-piece quantities.