Coilcraft announced the HTX8045C Series LLC half-bridge transformers designed for isolated gate driver bias supply applications. The new transformers build on the established chip-style construction of the HTX family, representing an advancement over conventional core and bobbin designs. This compact, surface-mount configuration reduces component size and enhances manufacturing efficiency, enabling more cost-effective production.
The HTX8045C Series features higher isolation voltage compared to the HTX7045C and low interwinding capacitance as low as 0.55 pF. These characteristics make the transformers well-suited for use in isolated gate driver bias supplies employing the open-loop LLC topology to achieve low EMI noise and high CMTI (Common Mode Transient Immunity). The design characteristics provide particular benefits for high-frequency switches, including SiC, GaN, and IGBT technologies.
The HTX8045C transformers have received AEC-Q200 qualification, making them suitable for automotive traction inverters and motor controls, automotive on-board chargers (OBC), EV charging stations, battery management systems (BMS), and automotive DC-DC converters. The transformers are also applicable to a range of other automotive and industrial applications.
The transformers are optimized for isolated bias supplies for SiC and GaN gate drivers, including compatibility with devices such as the Texas Instruments UCC25800-Q1. The cost-effective design incorporates fully automated manufacturing processes to ensure consistent quality. The low interwinding capacitance helps minimize EMI and achieve high Common Mode Transient Immunity, making the HTX8045C Series suitable for demanding power conversion applications in automotive and industrial markets.
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