Quick Answer
Calculate Buck Converter Inductor Ripple-Based Inductance Calculator
Calculator
Result Interpretation
Buck Converter Inductor Ripple-Based Inductance Calculator computes Required Inductance in H using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- DC Output Current = 10
- Maximum Input Voltage = 48
- Switching Frequency = 200000
- Output-to-Input Voltage Ratio = 0.25
- Peak-to-Peak Ripple Current Ratio (ΔI_L / I_out) = 0.3
Expected Result:
- Required Inductance = 6.0E-5
Engineering Interpretation:
Under the given input conditions, the calculated result is: Required Inductance = 6.0E-5 H.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
required inductance = (maximum input voltage * (1 - output-to-input voltage ratio)) / (switching frequency * Δ·I_L / I_out * dc output current)Formula family: formula_powerelectronics_power_inductor_inductance_calculator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| Vin_max | Maximum Input Voltage | INPUT | Maximum Input Voltage |
| Vout_Vin_ratio | Output-to-Input Voltage Ratio | INPUT | Output-to-Input Voltage Ratio |
| f_sw_Hz | Switching Frequency | INPUT | Switching Frequency |
| delta_i_ripple_ratio | Peak-to-Peak Ripple Current Ratio (ΔI_L / I_out) | INPUT | Peak-to-Peak Ripple Current Ratio (ΔI_L / I_out) |
| I_out_A | DC Output Current | INPUT | DC Output Current |
| Required Inductance | Required Inductance | OUTPUT | Required Inductance |
Calculation Steps
- Enter the maximum input voltage in V.
- Enter the output-to-input voltage ratio in 1.
- Enter the switching frequency in Hz.
- Enter the peak-to-peak ripple current ratio (Δi_l / i_out) in 1.
- Enter the dc output current in A.
- Step 1: Compute required inductance.
- Read the required inductance (H) from the results.
Engineering Summary
Calculate Buck Converter Inductor Ripple-Based Inductance Calculator
Frequently Asked Questions
What does this calculator calculate?
The Buck Converter Inductor Ripple-Based Inductance Calculator estimates Required Inductance based on the input parameters you provide
Why is maximum input voltage important in this calculation?
maximum input voltage is directly proportional to required inductance. When you enter maximum input voltage in V, the calculator uses it in the engineering formula to compute the output
How should I interpret the result required inductance?
The calculator outputs required inductance in H. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Maximum Input Voltage (V), Switching Frequency (Hz), DC Output Current (A). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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