Electric vehicle power systems could use less space with a new transformer for inverters and DC-DC converters.
TDK has introduced a new series of gate drive transformers for automotive 500 V battery systems, designed to provide electrical isolation in traction inverters and DC-DC converters used in electric vehicles. The new E13 EM series is intended to help designers meet insulation and safety requirements while reducing space in power electronics.
The surface-mount transformers are built on a MnZn ferrite core and measure 18.6 mm × 14.6 mm with a maximum height of 12 mm. They are designed to operate at switching frequencies from 100 kHz to 400 kHz and support both flyback and push-pull converter topologies. Depending on the model, the transformers offer inductance values from 1.8 µH to 240 µH and saturation currents of up to 9 A, allowing their use across different power conversion designs. Low leakage inductance and an optimized winding structure help improve signal transfer and efficiency in fast-switching IGBT and MOSFET applications.
The series is designed to meet insulation requirements for automotive power systems. It provides creepage distances of up to 6.3 mm and clearance distances of up to 5.5 mm, supporting basic insulation for 500 V DC working voltage and reinforced insulation for 300 V RMS in accordance with IEC 60664-1 and IEC 61558-2-16 standards. The transformers are rated to withstand transient overvoltages of up to 2500 V and have a partial discharge extinction voltage of 900 V.
The E13 EM series is qualified to AEC-Q200 Rev. E for automotive applications and operates over a temperature range of -40 °C to +150 °C. It is also RoHS compliant and compatible with lead-free reflow soldering under JEDEC J-STD-020F.
The transformers are intended for use in AC-DC power supplies, isolated DC-DC converters, gate drive circuits for IGBT and MOSFET devices, and xEV traction inverter and auxiliary power systems.
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