Saturday, May 25, 2024

Sound Driver IC That Improves Runtime And Sound Volume Of Piezoelectric Sounder

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The PAM8906 enables designers to build a compact and power efficient devices with high volumes.

The driver IC is responsible for controlling the frequency and amplitude of the electrical signals that are sent to the piezoelectric sounder.

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PAM8906 from Diodes Incorporated (Diodes) is a new driver IC that enables designers to improve the output from piezoelectric sounders. The PAM8906 is capable of producing louder sounds that can be carried over longer distances by integrating a synchronous boost converter in the IC. This driver also integrates functionality that prolongs its battery-powered operation. The PAM8906 will enable designers to build low-power compact devices with high volumes. The PAM8906 driver IC is suitable for use in smoke/gas/water alarms, air humidifiers, handheld GPS devices, industrial security alarms, medical devices, and home appliances.

The PAM8906 operates with either external pulse-width modulation (PWM) input or in self-excitation mode, whereas other solutions will generally only support one or the other. This provides greater application flexibility and allows support for an increased variety of sounders. Its boost converter, using a small 0.47µH inductor, switches at a fixed 1.8MHz frequency. It has a low quiescent current (<1µA), and an automatic shutdown/wake-up that helps extend the operational lifespan in battery-powered applications.

The PAM8906 has three output voltage variants: 20VPP, 24VPP, and 36VPP. This enables the creation of different output versions of the same system. Unlike charge pump-based alternatives, this device maintains its output even as battery voltage drops over time.

A driver IC for piezoelectric sounders is an integrated circuit that is designed to generate electrical signals with a specific frequency and amplitude to drive a piezoelectric sounder. The piezoelectric sounder is a type of transducer that converts electrical signals into sound waves. The driver IC is responsible for controlling the frequency and amplitude of the electrical signals that are sent to the piezoelectric sounder. It is designed to provide a specific level of power output and to match the impedance of the sounder to optimize its performance. In addition to generating the electrical signals, the driver IC may also include features such as protection circuits to prevent damage to the sounder, volume control, and other advanced functions. Driver ICs for piezoelectric sounders are commonly used in applications such as alarms, buzzers, and other audio notification systems.

Diodes Incorporated is an American manufacturer of high-quality semiconductor products. The product portfolio comprises of discrete, analog, and mixed-signal products. Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, functional specific arrays, single gate logic, amplifiers and comparators, Hall effect and temperature sensors.


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