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IC SG3525, SG3524 Calculator

Now let us check this calculator for the SG3525 IC. Here this calculator will estimate the oscillator frequency based on the timing components as given below:

  • Rt = timing resistor (Ohms)
  • Ct = timing capacitor (Farads or µF)
  • Dead Time (optional)
Calculator by homemade-circuits.com

SG3525 Frequency Calculator










simple SG3525 inverter
simple SG3525 inverter

SG3525 Oscillator Frequency Formula:

f = 1 / ( (0.7 * Rt + 3 * Rd) * Ct )

If you are not using a dead-time resistor (Rd) then simplified formula is:

f = 1 / ( 0.7 * Rt * Ct )

In the above calculator the user can:

  • Enter Rt in kΩ
  • Enter Ct in nF
  • (Optional) Enter Rd in kΩ if needed

Example:

RtCtRdFrequency
10 kΩ1 nF(none)≈ 142.85 kHz
10 kΩ10 nF(none)≈ 14.28 kHz
10 kΩ1 nF2.2 kΩ≈ 92.17 kHz

SG3525 Duty Cycle Calculator

SG3525 Duty Cycle Calculator







PWM Pulse Width Calculator

SG3525 PWM Pulse Width Calculator







Transformer Turns Calculator (For Full Bridge or Push-Pull)

Assuming the turns and voltage ratio formula is:

Vp / Vs = Np / Ns

Transformer Turns Calculator










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