MOSFET: The Mainstay of Low-Voltage Power Supply
In the low-voltage power supply scenarios of core chips such as GPUs, MOSFETs are the absolute mainstay. They are responsible for efficiently converting high-voltage DC power into the low voltage required by GPUs. For example, in synchronous rectification and OR-ing circuits within server power supply units (PSUs), the main recommended models cover 25V to 80V. Their low on-resistance can significantly reduce power loss.
IGBT: High-Voltage and High-Current Switching
IGBTs are more suitable for high-voltage and high-current scenarios. In links such as UPS (Uninterruptible Power Supply) and energy storage BMS for AI servers, IGBTs undertake critical power conversion and switching control. Currently, mainstream products cover two major voltage classes: 650V and 1200V.
Diodes & Transistors: Fundamental Components in Circuits
Although inconspicuous, a single server may use hundreds of them. Their primary functions include: Schottky diodes (such as the PMEG series) for high-efficiency rectification, with a voltage drop as low as 0.25V, helping power supplies achieve Titanium efficiency of 97.5%; TVS tubes and ESD diodes for surge and electrostatic protection; and transistors for small-signal amplification and switching control.
