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
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
Rtin kΩ - Enter
Ctin nF - (Optional) Enter
Rdin kΩ if needed
Example:
| Rt | Ct | Rd | Frequency |
|---|---|---|---|
| 10 kΩ | 1 nF | (none) | ≈ 142.85 kHz |
| 10 kΩ | 10 nF | (none) | ≈ 14.28 kHz |
| 10 kΩ | 1 nF | 2.2 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
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