72 Series - Switch Mode Power Supply

The 72-000, 72-100, 72-200, 72-300, 72-400 and 72-500 series current sense transformer are mainly used in 20 Khz - 200 Khz and above range, like in a switch mode power supply. The secondary inductance shown in our specification data is measured at the given voltage level ( the test voltage freq. is set at 15.75 Khz) shown at the right of the inductance value.

The terminating resistor is also called the "burden resistor", and it is the resistor across the secondary terminals. The voltage across the terminating resistor is equal to Terminating Resistor divided by Number of secondary turns. This is the voltage that is being measured by the engineer for current monitoring purposes.

The primary Unipolar rating refers to single ended wave forms ( swing from zero to positive) such as in forward topology, etc. Primary bipolar primary waveform refers to double ended topology ( swing from positive to negative). These ratings are in Amperes-microseconds, and it is the maximum at which the transformer core will not saturate. Amp-microsec is the current flowing through the primary multiply by the ON time. The peak primary current these transformer can handle is up to 35 Amps.

72-00X (Encapsulated)

72-10X (Encapsulated)

72-20X (Epoxy Coated)

72-30X (6 amps Surface Mount)

72-40X (35 Amps Surface Mount)

72-50X (Non Encapsulated)