Ceci 1kW high-frequency LLC resonant transformer is engineered around a standard EER42 ferrite core platform (Ae = 194 mm²), purpose-built for LLC half-bridge and full-bridge resonant converter topologies operating at 60–200 kHz. It delivers reliable galvanic isolation and efficient step-down conversion from a 380–400V DC bus (post-PFC) to regulated outputs of 12V, 24V, or 48V DC — making it an ideal magnetic solution for server power supplies, telecom rectifiers, EV onboard chargers, industrial DC-DC converters, and LED driver power modules.

With a nominal resonant frequency of 100 kHz and a wide operating range of 60–200 kHz, this transformer achieves ZVS (Zero Voltage Switching) across the load range, dramatically reducing switching losses and enabling 95%+ peak efficiency. The EER42 core’s cylindrical center pillar ensures uniform flux distribution and reduced winding parasitics, while the standardized bobbin platform supports rapid customization of turn ratios, pin-out layouts, and mounting styles to match your specific LLC tank parameters.

The design supports a configurable turn ratio (e.g., 57:17 for 400V→240V, or 25:3 for 800V→48V) with integrated magnetizing inductance (Lm) and leakage inductance (Lr) control, enabling resonant tank design without external series inductors in many configurations. Premium MnZn ferrite material (PC40/PC44 or equivalent) ensures low core loss and minimal temperature rise at sustained 1kW continuous operation.

Applications typiques

• Server & Data Center Power Supplies
  80 PLUS Titanium / Platinum CRPS power supplies with LLC resonant DC-DC stage — 380V DC bus to 12V/48V regulated output for server rack power delivery.
• Telecom Rectifiers & Distributed Power
  48V/50A embedded power systems and distributed power architectures requiring high-efficiency LLC resonant conversion at 1kW class.
• EV Onboard Chargers (OBC)
  6.6–22 kW LLC resonant converters for electric vehicle charging systems — high-voltage bus to low-voltage battery interface with reinforced isolation.
• Industrial DC-DC Converters
  High-efficiency step-down converters for industrial automation, process control, and robotics requiring reliable isolated power at 1kW class.
• LED Driver Power Supplies
  High-power LED illumination systems requiring PFC + LLC two-stage topology with high power factor and low harmonic distortion.
• Medical Power Supplies
  MOPP-compliant isolation for medical-grade power units with reinforced insulation option (2× MOPP) per IEC 60601-1.
• Audio Amplifier Power Supplies
  Class D amplifier power supplies with low-noise LLC resonant conversion for high-fidelity audio applications.
• Systèmes d'énergie renouvelable
  Solar micro-inverters and energy storage DC-DC conversion stages requiring high-efficiency galvanic isolation.

Services d'ingénierie et de personnalisation

Grâce à une équipe expérimentée en simulation électromagnétique et à des chaînes de production conformes aux normes automobiles, nous proposons services de prototypage rapide et de personnalisation complète for this EER42 platform. Our engineering capabilities include:

• • Rapport de transformation et personnalisation des enroulements
    Fine-tune turns count, wire gauge, and winding topology to match your specific voltage conversion ratio, Lm/Lr targets, and current requirements.
  • Choix du matériau de base
    Premium Mn-Zn ferrite grades (PC40, PC44, PC95, 3C95, N97, etc.) selected based on your operating frequency, temperature range, and loss budget.
  • Adaptation mécanique et de montage
    Custom bobbin designs, mounting configurations (vertical / horizontal), pin-out mapping, and mechanical interfaces tailored to your PCB layout and enclosure constraints.
  • Accompagnement en matière de conformité et de certification
    UL, CE, RoHS, and automotive-grade (IATF 16949) documentation and testing support for your certification requirements. 100% Hi-Pot tested, 100% inductance verified.