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Home › Manufacturer › Diodes Inc. released 22VPP/31VPP selectable output piezo sounder driver to provide longer runtimes and drive higher SPL
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Diodes Inc. released 22VPP/31VPP selectable output piezo sounder driver to provide longer runtimes and drive higher SPL

SemiMediaEdit
August 11, 2021

Diodes Incorporated introduces the PAM8907 piezoelectric sounder driver, for maximizing sound pressure level (SPL) delivery from a ceramic/piezo sounder. The PAM8907 has a built-in synchronous boost converter, which extends SPL in battery-powered systems and outperforms other similar sounder drivers. The device is optimized for use in wireless trackers, industrial alarm systems, medical equipment, and domestic appliances.

The wide 1.8V to 5.5V input voltage range supported by the PAM8907 sounder driver enables it to address a broad variety of potential applications. A 22VPP or 31VPP output value can be selected (using the GPIO), thereby providing two different SPL options which allow optimized performance for SPL or battery runtime. Its integrated boost converter requires only a 1.0µH external inductor which helps reduce the bill-of-materials costs and board space.

Automatic shutdown and wake-up functions help to further extend the PAM8907 sounder driver’s runtime when incorporated into battery-powered systems, with less than 1μA of current drawn in shutdown mode. Thermal shutdown, overcurrent, and overvoltage protection, plus undervoltage lockout mechanisms, are included to ensure reliable operation. The product operates across a -40°C to +125°C ambient temperature range.

The PAM8907 piezoelectric sounder driver is supplied in the compact 10-pin U-QFN2020 package delivering a minimal footprint. It has a unit cost of $0.43 in 3000 piece quantities. More information visit https://www.diodes.com/part/PAM8907.

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