LTspice: SMPS Transformer Modeling with Practical Demo

Explore the SMPS transformer, a high-frequency switch-mode power supply device using ferrite cores, various architectures, and compact size versus bulky 50 Hz transformers.

Explore the applications of SMPS transformers across power supplies, medical devices, audio visual gear, and communication systems, with high-frequency isolation, gate-driver use, and wireless charging.

Compare isolated smps transformers, including flyback and forward topologies with primary and secondary windings and isolation, to non-isolated smps transformers using buck, buck-boost, and boost configurations.

Learn how to select the ideal core type for an SMPS transformer by considering power, switching frequency, and topology, and why high permeability cores (2000–2500) suit sub-500 kHz designs.

Explore how core shape and window configuration influence SMPS transformer performance, and compare E core, EE, EF, EPC, ETD, EER, PQ, and POP cores to optimize winding area and losses.

Select the suitable core size for an smps transformer by balancing the window area for windings with the cross sectional area for turns and power handling.

Explore core losses in transformers, driven by alternating magnetic flux, and learn how selecting the right magnetic core minimizes heat, waste, and improves SMPS transformer efficiency.

Explore ferrite core materials for SMPS transformers, focusing on flux density, the linear hysteresis range, and selecting ferrite types (P, W) to minimize losses at the operating frequency.

Demonstrates building a ferrite-core SMPS transformer, measuring secondary inductance, leakage and magnetizing inductance, primary leakage inductance, and winding DC resistance with an LCR meter and multimeter, then simulating in LTspice.

explains the transformer equivalent circuit model and LTspice implementation, detailing required parameters, turns ratio calculation from inductances, coupling, and simulation results showing input to output doubling.