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The Calculator

by Tyler Cooper
For this simple calculator, enter in the freqency, voltage ranges and current ranges and the duty cycle, inductor and current requirements will be displayed!
Frequency
Hz
 This is the boost converter frequency. For microcontrollers its often the CPU clock / 256
Min Vin
V
 The lowest expected input voltage
Max Vin
V
The highest expected input voltage
Min Vout
V
 The lowest desired output voltage
Max Vout
V
 The highest desired output voltage
Iout
Amps
 Output current draw
Vripple
V
Maximum allowable voltage ripple


Min. Duty Cycle Dmin = 1 - (Vimax/Vomin)
%
Max. duty cycle Dmax = 1 - (Vimin/Vomax)
%
Min. Inductor size L > D * Vin * (1-D) / (freq * 2 * Iout )
uH
Peak inductor current Ipk = (Vinmax * D)/(f * L)
A
Minimum capacitor Cap > Iout / (Vripple * freq)
uF
Minimum Schottky diode Vbreakdown >= Voutmax & Idiode >=Ipk
V A
OVERVIEW
This guide was first published on Jun 13, 2013. It was last updated on Oct 21, 2018. This page (The Calculator) was last updated on May 04, 2015.