#Piezo sounder driver#

#Piezo sounder driver#

But here is a brief overview of the technology before diving into driver circuit types.Ĭonstructed of a piezo material that physically deforms when a voltage is applied, piezoelectric devices produce more or less noise based on the amount of deformation caused by the applied voltage. To get a good primer on the working principles of buzzers and piezoelectric transducers, Buzzer Basics: Technologies, Tones, and Drive Circuits provides extensive information. There are a number of driver circuit options available to designers, and this article covers the advantages and disadvantages of several common design techniques. While this gives transducers added flexibility, it also results in additional design work surrounding the driver circuit, where the sound created by the buzzer is reliant upon both the selected buzzer and the signal used to drive it. 8815207.pdf 19 KB: news (pdf file) /assets/news/8815207.Piezoelectric transducer buzzers are a well-known option for audible identification and alert between a product and its user, but unlike their indicator counterparts, transducer buzzers require an external driver circuit to produce a desired tone or sound.For further information, including SEC filings, visit Diodes' website at Company Contact: Additional engineering, sales, warehouse, and logistics offices are located in Fort Worth, Texas Taipei Hong Kong Manchester Shanghai Shenzhen, China Seongnam-si, South Korea Suwon, South Korea Tokyo, Japan and Munich, Germany, with support offices throughout the world. Diodes' wafer fabrication facilities are located in Kansas City, Missouri and Manchester, with four manufacturing facilities located in Shanghai, China, and two joint venture facilities located in Chengdu, China, as well as manufacturing facilities located in Neuhaus and Taipei.

Design, marketing, and engineering centers are located in Plano San Jose, California Taipei, Taiwan Manchester, England and Neuhaus, Germany. Diodes' corporate headquarters and Americas' sales office are located in Plano, Texas. Diodes' products include diodes, rectifiers, transistors, MOSFETs, protection devices, functional specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. For further information, visit the Company's website at About Diodes Incorporatedĭiodes Incorporated (Nasdaq: DIOD), a Standard and Poor's SmallCap 600 and Russell 3000 Index company, is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic and analog semiconductor markets. These comprise thermal shutdown, over-current, over-voltage and under-voltage lock-out protection. Product reliability is aided by the PAM8904's low inrush current, low EMI drive technology and a variety of integrated protection features. In shutdown mode, quiescent current is less than 1μA. For example, active current consumption is just 300μA in 1x mode, with an input voltage of 3V, input frequency of 4kHz and driving a 15nF piezo. The sounder driver helps to keep current consumption low and battery life long by employing built-in automatic shutdown and wake-up functions. The charge pump also enables designers to select three different piezo sound pressure levels by offering 1x, 2x and 3x operating modes. Operating from a 2.3V to 5.5V supply at a fixed frequency of 1MHz, the PAM8904 is able to drive a sounder load of up to 15nF, providing a 9V output with a minimal component footprint. With its wide input signal range of 20Hz to 300kHz and ability to deliver high volume at a low operating current, this driver is suitable for a variety of battery-powered applications, including medical systems, alarm clocks and security devices. The PAM8904 is capable of driving piezoelectric sounders up to 18VPP from a 3V power supply. Diodes Incorporated (Nasdaq: DIOD), a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic and analog semiconductor markets, today introduced the PAM8904 piezo-sounder driver with integrated multi-mode charge pump boost converter.