The rapid escalation of rack power requirements in AI data centers is forcing a shift toward 800 VDC architectures, creating a critical need for advanced circuit protection. Power Integrations (NASDAQ: POWI) and Ideal Power Inc. (NASDAQ: IPWR) have announced a collaboration to develop a solid-state circuit breaker (SSCB) designed for these high-voltage environments. By combining Power Integrations’ 1700 V InnoMux-2 power conversion ICs with Ideal Power’s B-TRAN® bidirectional semiconductor power switches, the companies aim to provide a self-powered, ultra-fast protection solution that addresses the limitations of traditional mechanical and electronic breakers.
InnoMux-2 and B-TRAN® Integrated Architecture
The proposed architecture seeks to solve the dual challenge of speed and efficiency in high-voltage power paths. Current mechanical breakers are often too slow to protect sensitive AI computing loads, while existing electronic alternatives frequently introduce significant power losses or require an external auxiliary power supply from the 800 V bus. The new design utilizes the InnoMux-2 IC to convert 800 V into isolated power for gate-drive, control electronics, sensing, and auxiliary circuitry. This IC features 1700 V PowiGaN technology, which the companies state can operate from an 800 VDC bus with significant margin. Instead of using a conventional single isolated power supply followed by multiple DC-DC converters, the InnoMux-2 provides multiple independently regulated outputs. This configuration is intended to create a self-powered system that enables ultra-fast fault isolation while eliminating the need for external auxiliary supplies. The companies have already demonstrated a working prototype and are currently developing a reference design to support this intelligent SSCB architecture.
Addressing AI Data Center Voltage Transitions
As AI infrastructure migrates toward 800 VDC, the industry faces systemic challenges in power conversion, control, and protection. The collaboration is positioning this SSCB as a necessary component for maintaining resiliency and scalability in next-generation data centers. Ideal Power CEO David Somo noted that traditional protection methods are proving inadequate, as mechanical breakers lack necessary speed and previous semiconductor-based breakers have historically been disqualified due to high power loss. The integration of B-TRAN® technology is intended to mitigate these conduction losses, which the company claims can improve power efficiency and reduce energy consumption. By providing a compact solution footprint, the partnership aims to meet the strict mechanical constraints and demanding efficiency requirements inherent in modern AI computing environments. This development suggests a move toward more integrated, intelligent power delivery systems that can manage the high-density energy demands of AI workloads without compromising system stability or increasing the total energy footprint of the data center facility.
Key Takeaways
- Power Integrations and Ideal Power are collaborating on a solid-state circuit breaker (SSCB) for 800 VDC AI data center architectures.
- The solution combines 1700 V InnoMux-2 power conversion ICs with B-TRAN® bidirectional semiconductor power switches.
- The architecture is designed to be self-powered, using the InnoMux-2 IC to provide isolated power for control electronics and sensing directly from the 800 V bus.
EnergyInsyte's Take
In our view, this collaboration highlights a critical bottleneck in the AI infrastructure build-out: the inadequacy of legacy protection hardware for high-density DC architectures. As data centers push toward 800 VDC to manage massive power draws, the "protection gap" between slow mechanical breakers and inefficient electronic ones becomes a primary risk to uptime and efficiency. By attempting to integrate power conversion and circuit protection into a single, self-powered unit, Power Integrations and Ideal Power are targeting the core complexity of high-voltage management. If this reference design successfully reduces conduction losses while maintaining ultra-fast fault isolation, it could become a standard building block for the next generation of AI-ready power distribution units.
Questions & Answers
How does this new architecture eliminate the need for an external auxiliary power supply?
The InnoMux-2 IC converts the 800 VDC bus voltage into isolated power specifically for the gate-drive, control electronics, sensing, and auxiliary circuitry required by the circuit breaker, making the system self-powered.
What specific technical advantage does the InnoMux-2 IC provide over conventional architectures?
Unlike conventional architectures that use one isolated power supply followed by multiple DC-DC converters, the InnoMux-2 IC provides multiple independently regulated outputs, which the companies claim improves efficiency and reduces footprint.
Why are traditional mechanical breakers considered insufficient for AI data centers?
According to the companies, mechanical circuit breakers are too slow to provide the necessary protection for the sensitive rack equipment used in high-power AI computing environments.
What role does B-TRAN® technology play in this collaboration?
Ideal Power’s B-TRAN® bidirectional semiconductor power switch is used to protect the 800 V power path to the AI computing load, offering low conduction losses to address the efficiency issues seen in previous semiconductor-based breakers.
Source: Power Integrations
