ss=”art-wrap”> Key Takeaways Switching frequency selection balances magnetic size (↓ with ↑fsw) against switching losses (↑ with ↑fsw); optimal fsw occurs where conduction loss ≈ switching loss. Noise in power supplies originates from three critical nodes: error amplifier input, reference…
Key Takeaways SMPS achieves high efficiency (80–90%+) by operating the power switch in saturation/cutoff — minimizing conduction and voltage drop losses. Pulse Width Modulation (PWM) is the dominant control method due to its fixed switching frequency, which simplifies EMI filtering…
Key Takeaways Crss (reverse transfer capacitance) and Qgd dominate switching loss in MOSFETs—prioritize low Crss over low total gate charge when selecting for hard-switching SMPS above 100 kHz. MOSFETs offer positive RDS(on) temperature coefficient for inherent current sharing in parallel…
Key Takeaways SMPS control loop stability hinges on achieving ≥45° phase margin and ≥12 dB gain margin — not just theoretical modeling, but bench-verified with a frequency response analyzer (FRA). The power-stage transfer function dictates compensation type: Type II suffices…