TDK introduces E13 EM gate drive transformers for 500 V EV systems

TDK has introduced the E13 EM series (ordering code B8280*F*), a line of surface-mount gate drive transformers for IGBT and FET gate drivers and isolated DC-DC converters for automotive 500 V battery systems. The parts provide isolation in traction inverters and DC-DC converters on electrified vehicle platforms.

The series uses a MnZn ferrite core in a surface-mount package measuring 18.6 x 14.6 mm and up to 12 mm tall. The components operate at frequencies between 100 kHz and 400 kHz and come in flyback or push-pull versions. Inductance values run from about 1.8 µH to 240 µH, and saturation current reaches up to 9 A, which TDK says gives designers flexibility across different power architectures. The company also says low leakage inductance keeps signal transmission stable for fast-switching power semiconductors.

The transformers offer creepage distances of up to 6.3 mm and clearance distances of up to 5.5 mm. TDK says they meet basic insulation at 500 V DC and reinforced insulation at 300 V RMS, compliant with IEC 60664-1 and IEC 61558-2-16. The parts are specified for transient overvoltages up to 2,500 V and a partial discharge extinction voltage of 900 V.

Gate drive transformers pass the switching signal across a galvanic barrier, keeping the high-voltage battery domain separate from the control electronics. That isolation is a safety requirement in EV drivetrains, and it gets harder to hold as parts shrink and the creepage and clearance distances that block a flashover get smaller.

TDK says the components are RoHS compatible and specified for lead-free reflow soldering to JEDEC J-STD-020F, and that the series is qualified to AEC-Q200 Rev. E and rated for operation from -40° C to +150° C.

Source: TDK