Diodes Introduces AM9468 and AM9469 Brushless DC Motor Drivers with Bridge-TIed-load (BTL) Drive Architecture to Minimize Audible Switching Noise and Electromagnetic Interference (EMI) in Laptops and Desktops Intelligently driven cooling fans are available in instrumentation and similar devices, and support a wide range of other medium voltage, low power motor drive applications.

The AM9468/AM9469 implements flexible motor speed control using an external pulse-width modulated PWM signal or DC DC voltage, or voltage from the thermistor network, to adjust the duty cycle of the full-bridge output driver stage based on the input signal. At the same time, a separate frequency generator provides an output speed that allows the motor speed to be monitored externally. The BTL architecture amplifies the flux density sinusoidal signal used to drive the motor coils, avoiding large current fluctuations during commutation and helping to achieve low noise operation. The speed control PWM duty cycle is superimposed on the BTL drive signal.

The AM9468/AM9469 features a built-in quick-start circuit and rotor lock detection to protect the motor coil from overheating or burnout, and also to ensure automatic restart when the lock is released. Other features include current-limit circuitry and Hall-biased outputs, all of which help to significantly reduce the number of external components and PCB footprint of the solution, as well as reduce component and manufacturing costs.

The AM9468 is available in a standard, power-capable TSSOP-16 package, while the AM9469 is available in a bare thermal pad TSSOP-16EP package with better thermal performance to provide or sink up to 700mA of output current. The AM9468/AM9469 features a thermal shutdown circuit that provides overtemperature protection, a special feature that protects closed-loop coils and cooling fan PCBs in demanding consumer applications. Both devices feature an operating temperature range of -40°C to 105°C.

For more information, please visit the company website.

Introduction to Diodes

Diodes Incorporated, a S&P SmallCap 600 Index and Russell 3000 Index, is the world's leading manufacturer and supplier of discrete, logic, analog and mixed-signal semiconductor products for consumer use. Different markets such as electronics, computers, communications, industry and automobiles. Diodes' products include diodes, rectifiers, transistors, MOSFETs, protection devices, special function arrays, single-gate logic, amplifiers and comparators, Hall effect and temperature sensors, covering LED drivers, AC-DC converters and controllers, DC- Power management devices such as DC switches and linear regulators, voltage references, and special features such as USB power switches, load switches, voltage monitors, and motor controllers.

Diodes' headquarters and US sales offices are located in Plano, Texas, USA and Milpitas, California, in Plano, Milpitas, California, Taipei, Taoyuan, Zhubei, and the United Kingdom. Chester and Neuhaus in Germany have design, marketing and engineering centers; wafer fabrication facilities in Kansas City and Manchester, Missouri, and one in Shanghai; in Shanghai, Jinan, Chengdu, Yangzhou , assembly and test facilities in Taipei, Hong Kong and Neuhaus, Germany; engineering, sales, warehousing and logistics offices in Taipei, Hong Kong, Shanghai, Shenzhen, South Korea, Manchester, and Munich; Sales and support offices are located around the world.

For more detailed information, including the SEC file, please visit the company website:

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