Compact SMT current sense transformers for power electronics

1st March 2016
Posted By : Jordan Mulcare
Compact SMT current sense transformers for power electronics

TDK Corporation presents two series of EPCOS SMT current sense transformers for power electronics. The various types in the B78417A series are based on EP7 ferrite cores, have compact dimensions of just 10.6x12.2x11.0mm and are designed to measure pulse currents of up to 20A.

The maximum DC resistance on the primary winding is 1.9mΩ. The SMT current sense transformers in the B78419A series are designed with EP10 ferrite cores. These components have dimensions of 12.8x13.6x14.4mm and their measurement range extends up to 30 A. The DC resistance is just 0.5mΩ.

Each series is available with a variety of turn ratios: While the EP7-based transformers are available in four versions with turn ratios of between 1:50 and 1:125, the EP10 transformers offer five versions with turn ratios of between 1:50 and 1:180. The permissible operating temperature range extends from -40 to +150 °C. The transformers are suitable for measuring currents in the frequency range from 50 to 250kHz.

Possible applications include switch-mode power supplies and all types of converters. The test voltage between the primary and secondary sides is 2400VAC and the creepage distances meet the requirements for basic insulation according to IEC 60664. As the components are qualified to AEC-Q200, they can also be used in xEV applications, e.g. for measuring the currents in DC/DC inverters.


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Vietnam International Defense & Security Exhibition 2020
4th March 2020
Vietnam National Convention Center, Hanoi
The Sensor Show 2020
16th June 2020
Germany Messe Munich