{"id":14931,"date":"2019-12-05T10:00:00","date_gmt":"2019-12-05T10:00:00","guid":{"rendered":"https:\/\/www.engineernewsnetwork.com\/blog\/?p=14931"},"modified":"2019-12-04T11:00:56","modified_gmt":"2019-12-04T11:00:56","slug":"enhanced-sounder-driver-enables-audio-ui-in-smaller-smart-sensors-and-wearables","status":"publish","type":"post","link":"https:\/\/www.engineernewsnetwork.com\/blog\/enhanced-sounder-driver-enables-audio-ui-in-smaller-smart-sensors-and-wearables\/","title":{"rendered":"Enhanced sounder driver enables Audio UI in smaller smart sensors and wearables"},"content":{"rendered":"\n

Diodes Incorporated announces an enhanced version of its sounder driver for small and portable devices. It delivers higher performance at a lower voltage in a smaller package.<\/p>\n\n\n\n

Miniature piezo and ceramic sounders are now used extensively in trackers, alarms, health monitors, security devices, and smart sensors as a form of audio user interface. <\/p>\n\n\n\n

The sounders\u2019 small size allows them to be fitted into portable and wearable devices, such as IoT-enabled trackers, as well as enabling miniature smart sensors that monitor the environment, including security detectors and water, smoke, and CO2 alarms. <\/p>\n\n\n\n

The PAM8904E<\/a><\/strong> sounder driver is designed to meet the requirements of the smallest application operating from extremely low voltages.<\/p>\n\n\n\n

The PAM8904E can support both single-ended and differential output modes with minimal external components. <\/p>\n\n\n\n

The device features a wide-input voltage supply range between 1.5V and 5.5V and a shutdown current consumption within 1\u00b5A. The sounder also accepts an input signal between 20Hz to 300kHz. <\/p>\n\n\n\n

Despite its small size, the PAM8904E integrates a charge-pump boost converter that operates in 1x, 2x, and 3x modes. As such, the PAM8904E is able to generate an output voltage up to 18V peak-to-peak from a 3V supply voltage or 27Vpp from a 4.5V supply.<\/p>\n\n\n\n

The enhanced option can now drive a sounder load up to 47nF, which is significantly higher than the drive capability of competing devices. <\/p>\n\n\n\n

Many competing devices can typically only drive a load of 15nF and require a higher supply voltage. The PAM8904E also features thermal shutdown, overcurrent protection, and short-circuit protection as well as an automatic shutdown and wake function that can help maximise the operational lifetime of battery-powered devices.<\/p>\n\n\n\n

The PAM8904EGPR is available in the W-QFN2020-12 Type A package, which measures 2.00mm \u00d7 2.00mm wide \u00d7 0.80mm high. Other packaging options include U-QFN3030-12 Type A (PAM8904EJPR) and U-QFN3030-16 (PAM8904EJER).<\/p>\n","protected":false},"excerpt":{"rendered":"

Diodes Incorporated announces an enhanced version of its sounder driver for small and portable devices. It delivers higher performance at a lower voltage in a smaller package. Miniature piezo and ceramic sounders are now used extensively in trackers, alarms, health monitors, security devices, and smart sensors as a form of audio user interface.  The sounders\u2019 …<\/p>\n","protected":false},"author":1,"featured_media":14932,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[104],"tags":[906,4014],"class_list":["post-14931","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-electronics","tag-diodes","tag-smart-sensors"],"yoast_head":"\nEnhanced sounder driver enables Audio UI in smaller smart sensors and wearables - Engineer News Network<\/title>\n<meta name=\"description\" content=\"Diodes Incorporated announces an enhanced version of its sounder driver for small and portable devices. 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