Power-converter topology comparison
Compare feasible ideal conversion ratios and semiconductor voltage stress across an input range.
Development preview. Check the assumptions below before relying on a result. Calculations run in your browser.
How it calculates
Assumptions
- A feasibility screen is not a ranked device or topology recommendation. Current, thermal limits, ripple, controller availability, isolation construction and cost need the linked design calculations.
- Isolated topologies may be considered even when isolation is optional. The entered fixed turns ratio can exclude a topology that a different transformer ratio would make feasible.
- Duty screens use ideal CCM conversion and exclude switch drops, leakage spikes and minimum pulse limits. Four-switch duty is the simultaneous two-leg modulation case.
Worked example
These are the calculator's default inputs. Change any input above to recalculate.
Inputs
- Minimum input voltage
- 8 V
- Maximum input voltage
- 16 V
- Output-voltage magnitude
- 12 V
- Output current
- 2 A
- Output polarity
- positive
- Isolation requirement
- no
- Maximum allowed duty
- 0.9
- Isolated primary / secondary turns
- 4
Results
- Candidate topologies
- Four-switch buck-boost, SEPIC, Zeta, Flyback
- Required output power
- 24 W
- Feasible candidates under entered screens
- 4