Enter the Particle Mass, Velocity, Wavelength, and Energy into the de Broglie Wavelength Calculator to find the de Broglie Wavelength, Momentum, Wave Number, and Phase Velocity for your quantum particle.
Duty Cycle (D)
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Primary Inductor (L1)
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Secondary Inductor (L2)
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Coupling Capacitor (Cc)
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Output Capacitor (Co)
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Input Current (Ii)
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Output Power
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A SEPIC (Single-Ended Primary Inductor Converter) is a DC-DC converter that can either step up or step down voltage while maintaining positive output polarity. It uses two inductors, a coupling capacitor, a diode, and a switching transistor to transfer energy from input to output.
SEPIC converters provide non-inverting output (positive polarity), continuous input current, and good isolation between input and output. Unlike buck-boost converters, SEPIC maintains the same ground reference for input and output.
The coupling capacitor must be non-polarized and low ESR since it carries all the power. It should be rated for the peak voltage stress and sized to minimize voltage ripple. Ceramic or film capacitors are typically used.
The voltage conversion ratio is Vo = Vi × D / (1-D), where D is the duty cycle. This means the output voltage can be higher or lower than input voltage depending on the duty cycle.
The two inductors (L1 and L2) can be separate components or coupled windings on the same core. L1 provides continuous input current while L2 helps with output current smoothing and energy storage.
Higher switching frequencies allow smaller components but increase switching losses. Typical frequencies range from 50kHz to 500kHz. Consider efficiency, component size, and EMI requirements when selecting frequency.
Lower current ripple reduces core losses and improves efficiency but requires larger inductors. Typical ripple is 20-40% of average current. Higher ripple may cause discontinuous conduction mode.
Main challenges include coupling capacitor selection (high current stress), right-half-plane zero in control loop compensation, and higher component count compared to simpler topologies like buck or boost converters.