I'm reviewing a set of inductors for the Experimenting with Magnetic Components design challenge. In this post: measuring a circuit made with inductor #13 of the kit: HCTSM80304BAL-E1 Pulse Transformer, 3:4, 300µHHCTSM80304BAL-E1 Pulse Transformer, 3:4, 300µH
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Schematic
In the previous post I showed the build. But didn't give the schematic.
The transformer can handle pulses well.
My input signal is a symmetric square wave at 400 kHz. Ideally, the input should have a series capacitor to remove DC (and avoid saturation) and a resistor (to dampen resonance).
The output are two inverse square waves, each with half wave rectification.
A 22 µF capacitor deals with ripple. The load is 10K.
The circuit is again filtered but unregulated.
Measurements
Although this can be an isolated design, my probing setup connected the exit winding of the primary with the middle tap of the secondary. Via the probe ground clips.
At the top of this article, you see all signals.
The second capture are the transformer input and the two outputs:
Then the two output windings and the DC output voltage over the load:
... and the 3 transformer signals and the AC (ripple) component of the load voltage:
As last, the two output signals interlaced:
