Proving the Business Case for the Internet of Things

Converter lets IoT devices run efficiently from high voltages

Steve Rogerson
July 19, 2018

Texas-based Diodes has introduced a universal offline buck converter designed for low-power IoT applications. Using the device, manufacturers will be able to develop IoT applications that are powered directly from a high-voltage AC supply yet deliver power efficiency.
With the number of devices in the IoT expected to rise to many billions in the next few years, energy efficiency is now a major design consideration.
With its wide AC input voltage range and integrated mosfet, the AL17050 provides a compact and efficient way to generate a constant voltage for low-power applications that need to comply with strict standby power restrictions.
The device has been developed to accept an AC input voltage between 85 and 265V AC, making it suitable for any region. The internal mosfet can withstand voltages of up to 500V yet is optimised for low-power applications, meaning it only consumes 100μA of static current. Furthermore, the device automatically adjusts to low loads to improve overall efficiency.
The non-isolated design reduces the cost for manufacturers developing applications for the IoT, such as smart appliances, smart sensors and connected lighting. The device delivers a constant 3.3 or 5V at up to 60mA, making it suitable for devices based on low power microcontrollers that integrated IoT connectivity such as Bluetooth LE or Zigbee.
Alongside its regulation and efficiency, the device also integrates protection against over-temperature, over-load, output-short and open-loop conditions. It is available in the SOT25 package and requires few additional components in a buck converter configuration, making it suitable for small products where space is often limited.
Diodes’ corporate headquarters are in Plano, Texas, and Milpitas, California. Design, marketing and engineering centres are in Plano; Milpitas; Taipei, Taiwan; Taoyuan City, Taiwan; Zhubei City, Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer fabrication facility is in Manchester, with an additional facility in Shanghai, China.
Diodes has assembly and test facilities in Shanghai, Jinan, Chengdu and Yangzhou, China, as well as in Hong Kong, Neuhaus and Taipei. Additional engineering, sales, warehouse and logistics offices are in Taipei; Hong Kong; Manchester; Shanghai; Shenzhen, China; Seongnam-si, South Korea; and Munich, Germany, with support offices throughout the world.