Science & Technology
Fri, September 9, 2011Thu, September 8, 2011Wed, September 7, 2011Tue, September 6, 2011Mon, September 5, 2011Sun, September 4, 2011Sat, September 3, 2011Fri, September 2, 2011Thu, September 1, 2011Wed, August 31, 2011Tue, August 30, 2011Mon, August 29, 2011Sat, August 27, 2011Fri, August 26, 2011Thu, August 25, 2011Wed, August 24, 2011Tue, August 23, 2011Mon, August 22, 2011Sun, August 21, 2011Sat, August 20, 2011Fri, August 19, 2011Diodes Incorporateda?s Single-Chip Solution for Smart Fan Motor Drivers Is Industrya?s Smallest
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Published in Science and Technology on Tuesday, August 30th 2011 at 6:11 GMT by Market Wire🞛 This publication is a summary or evaluation of another publication
PLANO, Texas--([ BUSINESS WIRE ])--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 announced the industrya™s smallest, full-featured, single-chip fan driver with high-output drive capability to provide a cost-effective solution for fan and motor drive applications.
Designed for driving low-power single-phase brushless DC (BLDC) fans and motors, the highly integrated AH5795 can provide an average motor current up to 500mA. Utilizing Diodesa™ low-profile DFN packaging technology, the AH5795 integrates a high-sensitivity Hall effect sensor, amplifier and an internal H-bridge driver output stage, suitable for single-coil fan motor applications. A PWM speed control pin provides enhanced motor speed control by varying the duty ratio of the PWM signal, in addition to the supply voltage.
The devicea™s operating voltage range is 1.8V to 6V, making it well-suited for low operating voltage BLDC fans that require low-voltage start-up in both VDD and PWM speed control modes. Additionally, the AH5795a™s bi-directional full-bridge driver uses soft switching to minimize audible switching noise and electromagnetic interference (EMI).
To protect the coil from overheating, the new motor controller includes integrated locked rotor detection and automatic self-restart functions, which serve to shutdown the output driver in the event of a locked rotor and then restart the motor when the rotor is freed. In addition, a tachometer output is provided by an open-drain frequency generator, which allows external speed monitoring. The all-in-one smart motor controller eliminates the need for most external components, including a timing capacitor.
The AH5795 has an extended ambient operating temperature range of a"40C to +105C, suitable for thermally demanding applications such as enclosed space fan motors.
The AH5795 is fully RoHs complaint with Green molding compound and is available in space-saving low-profile DFN2020-6 and TSOT23-6 packages. For further information, visit the Companya™s website at [ www.diodes.com ].
About Diodes Incorporated
Diodes 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. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. 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, 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. The Company's corporate headquarters, logistics center, and Americas' sales office are located in Plano, Texas. Design, marketing, and engineering centers are located in Plano; San Jose, California; Taipei, Taiwan; Manchester, England; and Neuhaus, Germany. The Company's wafer fabrication facilities are located in Kansas City, Missouri and Manchester, with two manufacturing facilities located in Shanghai, China, another in Neuhaus, and two joint venture facilities located in Chengdu, China. Additional engineering, sales, warehouse, and logistics offices are located in Fort Worth, Texas; Taipei; Hong Kong; Manchester; and Munich, Germany, with support offices located throughout the world. For further information, including SEC filings, visit the Company's website at [ http://www.diodes.com ].
