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TDK Presents Compact SMD Transformers for DC-DC Converters

23.8.2022
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TDK Corporation presents the EPCOS E13EMHV series of compact SMD transformers with high dielectric strength for a wide range of DC-DC converter topologies.

The isolation distances comply with IEC 60664-1, 61558-2-16 standard, achieving a high working voltage of 1000 V DC. Transient overvoltages of up to 2500 Vpeak are permitted. The high dielectric strength between the primary and secondary sides is 3000 V AC (50 Hz, 60 seconds).

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With dimensions of only 12.9 x 15.8 x 11.4 mm, the B78308*A003 series transformers are space-saving. The requirements for clearance and creepage distances according to the IEC 60664-1 standard (Np/Ns: min. 8.14 mm clearance, min. 11.2 mm creepage) are met in this compact design thanks to the internal construction of the transformers.

Two types are available for DC-DC converters in flyback topology with turns ratios of 1 : 0.22 : 0.78 and 1 : 0.33 : 0.7. Three types are available for push-pull and half-bridge converters with turns ratios of 1 : 1.07 and 1 : 1 : 0.57 : 2.14.

All new transformers are designed for a frequency range from 100 kHz to 500 kHz and have a very low losses and coupling capacitance of only 2 pF. The permissible operating temperature range is between -40 °C and +150 °C. The components of the new EPCOS transformer series are qualified to AEC-Q200 Rev. D and are suitable for various DC-DC converter topologies and gate driver circuits in e-mobility and industrial electronics.

Features

  • High dielectric strength prim/sec 3000 V AC, 50 Hz, 60 seconds, working voltage up to 1000 V DC
  • Compact dimensions of only 12.9 x 15.8 x 11.4 mm
  • Clearance and creepage distances according to IEC 60664-1
  • Qualified according to AEC-Q200 Rev. D

Applications

  • DC-DC converters and gate driver circuits in e-mobility and industrial electronics
Source: TDK

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