Please enter all required numeric values.
Formulas & Mathematical Logic
Step 1: Convert inductance from microhenry to henry: L(H) = L(µH) / 1000000.
Step 2: Maximum on-time: Tonmax = Isat × L / V.
Step 3: Convert Tonmax to microseconds by multiplying by 1000000.
Step 4: Minimum frequency: Fmin = 1 / (2 × Tonmax). Then convert Hz to KHz by dividing by 1000.
Step 5: Maximum power: Pmax = V × Isat / √6.
Step 6: Saturation energy: Esat = Isat² × L / 2. Then convert joules to microjoules by multiplying by 1000000.
About This Calculator
The Inductor Current and Maximum Power Calculator by CalcBoy helps estimate important limits for an inductor used in switching circuits, pulse circuits and power electronics. When voltage is applied across an inductor, current does not rise instantly. Instead, current increases with a slope controlled by applied voltage and inductance. If the current reaches the saturation current rating of the inductor, the magnetic core can saturate and the inductance value may collapse. This can cause high current stress, heating, switching transistor damage, unstable converter behavior, or poor efficiency.
This CalcBoy inductor calculator uses voltage across the inductor, inductance in microhenry and saturation current in amperes to calculate maximum on-time, minimum switching frequency, maximum power and saturation energy. The Ton max result is useful when designing buck converters, boost converters, flyback circuits, pulse drivers and current ramp systems. The frequency minimum result gives a quick idea of how fast the switching cycle should be compared with the maximum safe on-time. The energy saturation value helps compare inductors by the magnetic energy they can store before reaching the entered saturation current.
This tool is especially useful for electronics students, repair technicians, power supply designers, hobby engineers and anyone selecting an inductor for high-current or pulsed operation. A practical inductor selection should also consider DC resistance, temperature rise, ripple current, RMS current, shielding type, core material, package size and manufacturer datasheet limits. Real inductors may saturate gradually or sharply depending on core type, so the calculated value should be used as a design guide rather than a replacement for testing. For best results, confirm the selected inductor with an oscilloscope current waveform, thermal check and datasheet saturation curve.
CalcBoy provides this lightweight inductor current and maximum power calculator for fast web loading, simple engineering estimation and SEO-friendly reference use without external libraries or heavy images.