Cirrus Logic Expands Industry First Family of High Current PWM ICs for Driving Mid-Range Brushless and Brush DC Motors

Cirrus Logic Inc. (Nasdaq: CRUS) has added the SA303-IHZ and SA53-IHZ to its Apex Precision Power� product family of industry first high current pulse width modulated (PWM) ICs for driving three-phase brush and brushless DC motors. As follow-on products to the 2008 launch of its award-winning SA3XX and SA5X series of single-packaged solutions, these new ICs offer a lower per unit cost of up to 40 percent for industrial motor applications such as fans, pumps and robotics operating on supplies up to 60 V and requiring output current in the 3 A range (10 A PEAK).

�The earlier launch of the SA306-IHZ and SA57-IHZ has garnered strong customer interest because of the performance and protection features they offer in a very small package,� said Greg Brennan, vice president, Cirrus Logic Apex Precision Power business unit. �With the addition of the SA303-IHZ and SA53-IHZ, Cirrus Logic can now provide this same mix of product benefits to customers with applications in a lower power range and at a lower cost.�

Power Quad Package Delivers Thermal Efficiency

The SA303-IHZ and SA53-IHZ make use of the same 64-pin Power Quad package used in the SA3XX and SA5X series. With a footprint of less than two centimeters square, the ICs require up to 70 percent less board space compared to alternate discrete solutions with comparable power requirements. Cost savings can be realized through a reduction in the size, weight and overall system layout, while increasing the thermal efficiency of the motor control circuitry. The power dissipation capabilities of the package can be increased by up to 3X versus a standard on-board mounting configuration by using a patent-pending approach that involves mounting the device upside down through a cutout in the uniquely designed printed circuit board.

The use of pulse width modulation (PWM), or switching technology, further minimize power dissipation issues by allowing the overall operating system to run cooler and thus increase long-term reliability. The SA303-IHZ and the SA53-IHZ also use smaller filter components because they are able to switch at frequencies of up to 100 KHz.

Key Product Specifications

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� Motor Interface � Output Current �

Supply VoltageOperation

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Production VolumePricing10K Pieces USD*

SA303-IHZ �

Brushless DCMotor

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3 A continuous10 A PEAK

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10 V to 60 VSingle Supply