1. What is a Boost Converter?

A boost converter is a DC-to-DC power converter that steps up voltage from its input to its output. It is a type of switched-mode power supply (SMPS) containing at least one energy storage element (inductor) and one switching element (transistor).

2. How Does the Calculator Work?

The calculator uses the boost converter inductor formula:

Where:

• \( L \) — Inductance in Henrys (H)
• \( V_{in} \) — Input voltage (V)
• \( D \) — Duty cycle (0-1)
• \( \Delta I \) — Current ripple (A)
• \( f \) — Switching frequency (Hz)

Explanation: The equation calculates the minimum inductance needed to maintain the desired current ripple at the given operating conditions.

3. Importance of Inductor Selection

Details: Proper inductor selection is crucial for efficient boost converter operation. The inductor stores energy during the switch-on phase and releases it to the load during the switch-off phase.

4. Using the Calculator

Tips: Enter input voltage in volts, duty cycle (0-1), desired current ripple in amps, and switching frequency in Hz. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is typical current ripple (ΔI)?
A: Typically 20-40% of the average inductor current. Higher ripple reduces inductor size but increases losses.

Q2: How does switching frequency affect design?
A: Higher frequencies allow smaller inductors but increase switching losses. Common frequencies range from 50kHz to 2MHz.

Q3: What about inductor saturation current?
A: The inductor's saturation current must exceed the peak current (average current + ΔI/2).

Q4: How does duty cycle affect the calculation?
A: Maximum inductor current occurs at D = 0.5. The worst-case design should consider the maximum duty cycle expected.

Q5: What are practical inductor values?
A: For typical boost converters, inductor values range from 1µH to 100µH depending on power level and frequency.