TDK Expands its Range of Coupled Inductors

The nine series types cover an inductance range of 2 x 2.2 µH to 2 x 47 µH and are designed for maximum rated currents of 1.1 A to 4.3 A. The RoHS-compliant chokes are certified in line with AEC-Q200 and feature high saturation currents of up to 7.95 A. The magnetically shielded inductors have dimensions of just 7.3 x 7.3 x 4.8 mm and are designed for a wide temperature range of between -55 °C and +150 °C. Depending on the type, the chokes offer very high coupling factors of the two windings, from 97 to 99 percent.

Image used courtesy of TDK Electronics

These compact, robust components are useful in a wide range of applications, are ideal in various galvanically non-insulated DC/DC converter topologies such as SEPIC, Cuk, and Zeta, and act as transformers in flyback and multi-output buck topologies. In the latter, coupled inductors provide a second output voltage. Furthermore, the components can act as common-mode chokes in power supply lines. The insulation voltage between the two windings is >500 V.

Main applications

• DC/DC converters such as SEPIC, Cuk, or Zeta
• Flyback converters
• Multi-output buck converters
• Common-mode chokes in power supply lines

Main features and benefits

• High saturation currents of up to 7.95 A
• Small dimensions of just 7.3 x 7.3 x 4.8 mm
• Wide temperature range from -55 °C to +150 °C
• High coupling factor of up to 99 percent