TDK SMT transformers with high dielectric strength for DC-DC converter

TDK Corporation (TSE:6762) presents the EPCOS E13EMHV series of compact SMT 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 1000V DC. Transient overvoltages of up to 2500Vpeak are permitted. The high dielectric strength between the primary and secondary sides is 3000V AC (50Hz, 60seconds).

With dimensions of only 12.9mm x 15.8mm x 11.4mm, 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. 8.14mm clearance, min. 11.2mm 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 100kHz to 500kHz and have a very low coupling capacitance of only 2pF. The permissible operating temperature range is between -40°C and +150°C. The components of the new EPCOS transformer series are qualified to AEC-Q200Rev. 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 3000V AC, 50Hz, 60seconds, working voltage up to 1000VDC 
• Compact dimensions of only 12.9mm x 15.8mm x 11.4mm
• Clearance and creepage distances according to IEC 60664-1
• Qualified according to AEC-Q200Rev. D

Applications

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