Forward Converter Calculator
Calculate transformer turns ratio for forward (isolated) DC-DC converters
Volts (V)
Volts (V)
Percentage (%) - typically 30-50%
How to Use This Calculator
Enter Input and Output Voltages
Enter the DC input voltage and desired output voltage in volts.
Enter Duty Cycle
Enter the duty cycle as a percentage (typically 30-50% for forward converters).
Get Turns Ratio
Click calculate to see the required transformer turns ratio.
Formula
Vout = Vin × N × D
N = Vout / (Vin × D)
Where:
- Vout = Output voltage (V)
- Vin = Input voltage (V)
- N = Transformer turns ratio (Secondary:Primary)
- D = Duty cycle (as decimal, 0 to 1)
Example:
Input = 48 V, Output = 12 V, Duty Cycle = 40%
N = 12 / (48 × 0.4) = 12 / 19.2 = 0.625:1
About Forward Converter Calculator
The Forward Converter Calculator helps design forward (isolated) DC-DC converters. Forward converters transfer energy directly during the switch-on phase, making them more efficient than flyback converters for higher power applications. They provide electrical isolation and are commonly used in computer power supplies and industrial applications.
When to Use This Calculator
- High-Power Supplies: Design isolated converters for power levels above 50W
- Computer Power Supplies: Calculate transformer parameters for PC power supplies
- Industrial Applications: Design isolated power supplies for industrial equipment
- Telecommunications: Calculate converter parameters for telecom power systems
- Educational Purposes: Learn about forward converter design
Why Use Our Calculator?
- ✅ Accurate Calculations: Uses correct forward converter formula
- ✅ Easy to Use: Simple interface
- ✅ Free Tool: No registration required
- ✅ Educational: Includes formulas and examples
Common Applications
Computer Power Supplies: Forward converters are used in PC power supplies to provide multiple isolated outputs (3.3V, 5V, 12V) from AC mains input.
Industrial Power Supplies: High-power industrial equipment uses forward converters for efficient, isolated power conversion at power levels from 100W to several kilowatts.
Tips for Accurate Results
- Duty cycle typically ranges from 30-50% for forward converters
- Maximum duty cycle is limited by transformer reset requirements
- Consider efficiency losses in actual design
Frequently Asked Questions
What is a forward converter?
A forward converter is an isolated DC-DC converter that transfers energy directly from input to output during the switch-on phase. Unlike flyback converters, forward converters don't store energy in the transformer, making them more efficient for higher power applications.
How is forward different from flyback?
Forward converters transfer energy directly during ON time, while flyback converters store energy during ON time and transfer it during OFF time. Forward is more efficient for higher power but requires more components (reset winding or clamp circuit).
What is the typical power range?
Forward converters are typically used for power levels from 50W to several kilowatts. They're more efficient than flyback converters at these power levels but more complex.