KV Electronics Resonant Transformers are specifically designed for LLC resonant converter topologies and other soft-switching power supplies. Engineered to minimize switching losses and maximize efficiency, these transformers feature dedicated Primary, Auxiliary, and Secondary windings.

Utilizing advanced high-frequency ferrite cores (ETD, EER, PQ) with tightly controlled magnetizing inductance (Lm) and leakage inductance (Llk), our resonant transformers integrate the resonant inductor function, reducing component count and improving power density. This makes them ideal for high-efficiency server PSUs, solar inverters, EV chargers, and industrial converters requiring 93%+ efficiency.

Key Features

• Core shapes: ETD, EER, PQ ferrite cores
• Integrated resonant inductor (Lm + Llk controlled)
• High-frequency operation: 100kHz – 500kHz
• Tight Lm/Llk ratio control (±5%)
• Ultra-low core loss at resonant frequency
• High-voltage isolation: up to 5kV
• RoHS3 and IPC-A-610 compliant

Applications

• LLC resonant DC-DC converters
• Server and data center PSUs (>90% efficiency)
• EV on-board chargers
• Solar micro-inverters
• High-efficiency industrial SMPS