With the ever-increasing demand for AI computing power, server power supply design faces unprecedented challenges. In 1U server power supply designs, achieving high power density, high load stability, and miniaturization within limited space has been a pressing issue for engineers.
1U Power Supply Design: Capacitors Become the Core Limiting Factor for Miniaturization
In high-power-density power supply solutions for 1U AI servers, capacitors are often among the most difficult components to compress. Even with the continuous improvement in switching frequency and efficiency of new power devices such as GaN, the size and heat dissipation space of servers have not kept pace.
In this design, capacitors are not merely supporting components, but rather a key factor directly determining the success of the power supply solution.
1. Challenges of Capacitor Miniaturization
In practical AI server power supply projects, engineers typically face the following challenges:
• Increased power density
• Power module size reduction of over 50%
• Stable operation under long-term high temperatures, operating in a 105℃ environment
• High ripple current withstand capability, long-term high-load operation
• Controllable capacitance decay, maintaining system stability
Under these requirements, capacitor size reduction directly impacts the entire system design. Smaller capacitor volumes mean that capacitance and ripple current withstand capabilities may not simultaneously meet requirements, posing a significant design challenge.
2. Advantages of GaN Power Supplies and Increased Capacitor Requirements
With the introduction of GaN (Gallium Nitride) technology, power supply switching frequencies, efficiency, and size have improved, but this has also placed higher demands on capacitor performance.
For GaN power supplies, capacitors not only need higher capacitance density but also need to withstand greater ripple current and have a longer lifespan to ensure system stability.
YMIN IDC3 Series Capacitors
Solving the Core Challenges of High Power Density Power Supply Solutions
To address these challenges, YMIN Electronics has launched the IDC3 series of liquid aluminum electrolytic capacitors, specifically designed for GaN AI server power supplies. The core advantages of these capacitors are high capacitance density and high ripple current carrying capacity, enabling stable operation under harsh environments of high temperature and high load, making them a “key component” in high power density power supply designs.
Product Information
Series: IDC3
Specifications: 450V / 1400μF
Dimensions: 30 × 70 mm
Structure: Horn-shaped liquid aluminum electrolytic capacitor
1. The “Underlying Capability” of Capacitor Miniaturization—70% Increase in Capacitance Density
The increased capacitance density of the IDC3 series capacitors allows us to provide higher capacitance and ripple current carrying capacity without increasing size. Compared to similar Japanese products, the IDC3 series offers a 70.7% increase in capacitance density, from 13.64μF/cm³ to 23.29 μF/cm³. This allows for a 55% reduction in power module size without compromising performance stability.
2. Stability under Long-Term High Load Operation: Ripple Current and High-Temperature Lifespan
In high-load, high-temperature environments, capacitor stability is crucial. The IDC3 series capacitors can withstand high ripple current (19A), effectively reducing the number of parallel capacitors, optimizing power supply layout, and mitigating the risk of localized heat buildup.
Furthermore, at an operating temperature of 105°C, the IDC3 has a lifespan exceeding 3000 hours, with capacitance degradation controlled within 8%, ensuring stable power supply performance during long-term operation.
3. System-Level Benefits: More Than Just Capacitor Optimization
In Navitas’ GaN AI server power supply solution, the introduction of the IDC3 series capacitors brings several improvements: a 1%~2% increase in power efficiency, a reduction of approximately 10°C in system temperature rise, and a significant reduction in power module size.
These optimizations ultimately lead to the stability and long-term reliability of the entire server system, fully demonstrating the core role of capacitors in high-power-density power supply design.
Conclusion: The Crucial Role of Capacitors in 1U AI Server Power Supply Design
In the design of 1U AI server power supplies, which involve both high power density and high load, capacitors are not merely components, but rather a critical element determining the long-term stable operation of the power supply.
YMIN IDC3 series capacitors, with their superior capacitance density, ripple current carrying capacity, and high-temperature stability, have become an important contributor to AI server power supply design.
Post time: Jan-13-2026