The technological development trend of high-frequency switching power supplies is accelerating around five core directions: material innovation, digital intelligence, high-frequency integration, energy efficiency upgrading, and domestic independence, promoting the industry's transition from "usable" to "optimal". The following are the most representative technological evolution paths in 2026:

1. Wide bandgap semiconductors fully replace silicon-based devices and reconstruct power architecture

Gallium Nitride (GaN): Achieving large-scale penetration in medium and low voltage (<1000V) scenarios, widely used in mobile phone fast charging, 5G base stations, and AI server power supply. Texas Instruments' 1250V GaN devices now support an 800Vdc data center bus architecture, with a power density exceeding 1.5kW/in 3 and a 50% reduction in switch losses.

Silicon carbide (SiC): dominates the high-voltage (>1200V) field and is used in electric vehicle OBC, photovoltaic inverters, and industrial motor drives. SiC MOSFET has an efficiency of over 97% in charging piles above 30kW, and its high temperature resistance significantly improves system reliability.

The localization process is accelerating: It is expected that by 2026, China's self-sufficiency rate of GaN devices will exceed 50%, and 6-inch mass production of substrates and epitaxial links will be achieved, breaking the overseas monopoly.

2. Deep integration of digital power supply and AI control to achieve "self sensing and self optimization"

Digital control has become standard: using DSP or MCU instead of traditional analog loops to achieve precise coordination of multiple outputs, dynamic load prediction, and remote monitoring (such as the ET6000 series DSP chip from Yichuang Micro).

AI algorithm deep empowerment:

Predictive maintenance: Predicting device aging trends and early warning of faults through historical load data

Efficiency curve optimization: AI dynamically adjusts switch frequency and duty cycle, automatically entering "energy-saving mode" under light load

Intelligent parameter tuning: Huawei's fully liquid cooled supercharging station improves station turnover by 30% through AI algorithm

Typical application: The Xingu Kunlun KE-1300P power supply is equipped with dual chips (DSP+MCU) and achieves holographic visualization of power status through KL-CENTER software.

3. Switching frequency moves towards MHz level, power density continues to break through

Frequency boost drives miniaturization: GaN devices support switching frequencies above 1MHz, reducing the size of mobile phone chargers to the size of credit cards, and achieving a server power density of 3A/mm 2.

Technical challenges and breakthroughs:

Magnetic core material: nanocrystalline alloy replaces traditional ferrite, reducing high-frequency losses by 60%, but still increasing costs by 5-8 times

Skin effect: using Litz wires or planar transformers to alleviate AC resistance rise

EMI suppression: Combining frequency jitter and active filtering technology to meet CISPR 32 Class B standards

Typical scenario: The power supply of AI servers is shifted from traditional 48V architecture to 800Vdc bus, reducing conversion levels and improving system efficiency by 4-6%.

4. Mandatory upgrade of energy efficiency standards, forcing green design throughout the entire chain

China's GB 20943-2025:2027 will be enforced in February, expanding the coverage power range from 250W to kilowatts (including servers and PC power supplies), and raising the energy efficiency threshold to over 90%.

Key requirements:

Standby power consumption ≤ 0.5W (reduced to 0.3W by 2027)

Mandatory use of active PFC, power factor ≥ 0.95

Promote the design of electrolytic capacitors and automatic discharge circuits for X capacitors

International Benchmarking: Synchronize with EU ErP Lot 27 and US DOE Level VII to promote green compliance in the global power industry.

5. Modularization, redundancy, and system level integration become standard industrial equipment

N+1 redundant architecture: Communication and data center power systems commonly adopt modular parallel design, supporting hot plugging and online maintenance, with MTBF exceeding 500000 hours.

Magnetic integration technology: Integrating transformers, inductors, and filters into a single magnetic core, reducing the volume by 40%, suitable for 5G small base stations and vehicle electronics.

System level solution: Guangzhou Postal Science and Technology Co., Ltd. and other manufacturers have launched an "intelligent integrated power system" that integrates UPS, battery management, and AI monitoring, suitable for energy-saving transformation of high energy consuming enterprises.

Current core challenge:

High cost and complex process of magnetic materials at high frequencies

High threshold for GaN/SiC device driver circuit design

The digital power software ecosystem is not yet unified, and protocols are fragmented

The bottleneck of thermal management caused by high power density urgently needs to be overcome by solutions such as liquid cooling and phase change materials

Technological evolution has shifted from "single device optimization" to "system algorithm material" collaborative innovation, and high-frequency switching power supplies are evolving from "power supply units" to "intelligent energy nodes".