The correct turns ratio depends on the sense-voltage range required by your controller, the burden resistor value, and the accuracy needed across the operating current range. Higher ratios generate more sense voltage but increase burden dissipation, so selection requires balancing signal amplitude, thermal limits, controller input requirements, and the ET-product limits defined for each CT01 part number.
Choose a burden resistor that produces sufficient sense voltage for the controller while staying within the allowable ET-product and thermal ratings. ICE Components provides formulas relating burden value, turns ratio, output voltage, and primary current, allowing designers to size the resistor in a way that ensures reliable waveform reproduction and prevents core saturation.
Yes. CT01 is well suited for current-mode, average-current, and protection-focused SMPS control schemes. When paired with the correct burden resistor and minimal filtering, the transformer delivers an isolated representation of the inductor or switch-node current that is appropriate for control loops and protection thresholds.
Optimal performance is achieved by routing the primary path with minimal loop area, placing the burden resistor close to the secondary pins, and distancing high dV/dt switching traces from the transformer and sense lines. These practices reduce parasitic coupling and help maintain a clean, stable sense waveform.
Yes. CT01 is designed for switch-mode applications and can measure pulsed or non-sinusoidal currents as long as the volt-seconds applied remain within the ET-product limits for the specific part number. Appropriate burden selection and filtering help ensure waveform fidelity and prevent saturation.
Most designs do not require additional physical shielding. Using a continuous ground plane beneath the transformer and maintaining distance from noisy switching nodes generally provides adequate noise immunity, even in high-dV/dt environments.
Yes. CT01 can interface with a wide range of current-mode and protection-oriented SMPS controllers. Proper burden sizing ensures that the output waveform matches the input requirements of the specific controller being used.
The current to be sensed is routed directly through the transformer’s primary pins, and the secondary winding, paired with the burden resistor, generates a scaled and isolated voltage proportional to that current. This configuration supports monitoring of switch-node, inductor-leg, or supply-rail currents.
Accuracy is influenced by the chosen burden resistor, the transformer’s leakage inductance and parasitic characteristics, PCB stray capacitances, and input filtering at the controller. Maintaining short secondary traces and minimizing capacitive coupling to noisy nodes help preserve signal integrity.
The CT01 product page provides access to the datasheet, mechanical drawings, layout recommendations, and options to obtain SPICE and 3D models for simulation and CAD integration.
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