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Small smart motor module reduces PCB requirements

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By Nick Flaherty


Alpha and Omega Semiconductor (AOS) introduced an extension to its compact Smart Motor Module (SMM) family that reduces the PCB requirements.

The thermally enhanced 3mm x 3mm QFN-18L package of the AOZ9530QV houses a half-bridge power stage with 11mOhm RDS(ON) internal NFETs to simplify motor drive designs. The SMM is suitable for use in a large number of Brushless DC (BLDC) fan applications ranging from PC and server fans, seat cooling and home appliances.

The AOZ9530QV adds protection functions that include short circuit protection, over temperature protection, Vcc UVLO and bootstrap UVLO.

With an input voltage up to 28 V and supporting high current up to 7 A, the AOZ9530QV has a wide operating (-40°C to +125°C) ambient temperature range and offers 100 percent pulse-width modulation (PWM) duty operation support.

The adjustable gate drive sink and source current control gives designers the ability to minimize EMI while maximizing power efficiency in (BLDC) motor drives. A single AOZ9530QV would be used for single phase applications, two AOZ9530QV SMMs would be used for a H-Bridge motor drive, and three AOZ9530QV SMMs are needed for 3-Phase designs.

“We designed the AOZ9530QV in a compact 3mm x 3mm QFN package to satisfy higher density, space-constrained design trends in BLDC motor drives. In several cooling fan applications, the PCB for drive circuitry is enclosed within the fan assembly. The AOZ9530QV enables shrinking of the PCB enabling a system designer to increase the size of the fan blades, thus pushing more air within a given form factor,” said Armin Hsu, Power IC Senior Marketing Manager at AOS.

The AOZ9530QV is immediately available in production quantities with a lead-time of 24 weeks. The unit price in 1,000-piece quantities is $1.00 USD. AOS products are offered in packages with Pb-free plating and compliant to RoHS standards.

www.aosmd.com

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