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High-performance Smart Power Stage (SPS) family

Alpha and Omega Semiconductor (AOS) have announced a new family of high-performance Smart Power Stages (SPS) comprising of three DC current levels for multiphase voltage regulator optimisation.

These Smart Power Stages (SPS) have been designed to target multiphase VR regulators powering high-performance GPU and CPU in desktop Add-In Graphics Cards (AICs), gaming laptops, servers, data storage, artificial intelligence, and networking equipment.

The AOZ527xQI series uses AOS’s latest generation of a flexible smart driver IC and Gen Alpha MOSFET technology to provide benchmark performance in a standard 5mm x 6mm QFN package. The series comprises three DC current levels for multiphase voltage regulator optimisation.

An SPS provides current monitoring (IMON) and temperature monitoring (TMON) information. The IMON function is used to replace traditional DCR sensing schemes with improved accuracy and eliminates the external components needed for DCR sensing and tuning. The TMON pin doubles as a fault pin, reporting the power stage temperature by outputting an analog voltage of 8mV/°C. The TMON pin is an open-drain output that pulls high in the event of a fault.

The AOZ527xQI uses a highly flexible and configurable driver IC to make this SPS compatible with many multiphase controllers in the market.

It includes protection features such as Over-Current Protection (OCP), Over-Temperature Protection (OTP), High-Side FET Source Detect (HSD), and Pre-Over-Voltage Protection (Pre-OVP).

While AOS follows the industry standard 5 x 6 common footprint for a smart power stage, AOS's SPS also features a unique dynamic control of OCP threshold settings and Zero-Cross Detect (ZCD) light load operation. AOS SPS series offers both performance and robustness to support high peak currents common in servers, high-performance GPU and AI applications. This performance is guaranteed, and all devices in this family feature high peak current capability, up to 150A for 10us and 100A for 10ms.

Neil Tyler

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