A power device can help protect AI servers and GPUs from damage caused by sudden power spikes in high-performance computing systems.
Alpha and Omega Semiconductor Limited has introduced its SmartClamp protected DrMOS family to improve power-stage protection in high-current environments such as AI servers, data centers, and high-end GPUs. The devices are designed to prevent overcurrent-related failures by adding fast, in-stage protection that addresses limitations in controller-only approaches.
At the center of the lineup is the AOZ53228QI, which is intended to protect multiphase voltage regulators from catastrophic damage during current spikes. This is particularly relevant in AI workloads, where transient loads can exceed the safe operating limits of inductors and power stages. In such conditions, even very short delays in protection response—on the order of tens of nanoseconds—can allow large current surges that may damage MOSFETs, especially when inductors begin to saturate.
SmartClamp shifts current limiting into the power stage itself, rather than relying solely on external controllers, improving response speed and accuracy during fast transients. It continuously tracks inductor current on a cycle-by-cycle basis using an internal rising-edge ramp, enabling real-time monitoring under high slew-rate conditions.
The architecture supports both positive and negative current protection, helping manage bidirectional stress in modern multiphase VR designs. It is compatible with standard constant-on-time (COT) and fixed-frequency PWM controllers, and also integrates with AOS’s A2TM multiphase controller platform.
“AOS engineered the SmartClamp DrMOS family to address the specific ‘stress tests’ of modern AI workloads,” said Zach Zhang, Power IC Marketing Director at AOS. “By pairing these with our advanced controllers—such as the OVR16, OVR4-22, and Intel IMVP/AMD SVI3 compatible series—we offer a seamless, high-efficiency Vcore solution that gives designers peace of mind in high-density power applications.”
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