// multi-utility computation suite · offline · instant · precise
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eng.buck-converter-duty-cycle Calculator
Calculates buck converter duty cycle, output voltage, inductor ripple current, and minimum inductance from specifications. Buck converter output voltage V_out = D × V_in — duty cycle D is set by the PWM controller to maintain regulation against load and input variation.
Inputs
Vin V
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
Vout V
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
F Khz
Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
L Uh
Reference formula or conversion factor shown for context.
Iout A
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Results
duty cycle D
Reference formula or conversion factor shown for context.
inductor current ripple ΔIL (A)
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
minimum inductance for CCM (μH)
The smallest value in the dataset or feasible range.
estimated input current (A)
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
D = Vout/Vin (ideal buck)
Sample size or count used in the calculation.
ripple ratio
The proportional relationship between two quantities.