Forward (energy transfers through the magnetic field) | |
No transformer (non-isolated) | Step-down (buck) - The output voltage is lower than the input voltage, and of the same polarity. |
True buck-boost - The output voltage is the same polarity as the input and can be lower or higher. | |
Split-pi (boost-buck) - Allows bidirectional voltage conversion with the output voltage the same polarity as the input and can be lower or higher. | |
With transformer (isolatable) | Forward - 1 or 2 transistor drive. Push-pull (half bridge) - 2 transistors drive. Full bridge - 4 transistor drive.[8] |
Flyback (energy is stored in the magnetic field) | |
No transformer (non-isolated) | Non-inverting: The output voltage is the same polarity as the input. Step-up (boost) - The output voltage is higher than the input voltage. SEPIC - The output voltage can be lower or higher than the input. Inverting: the output voltage is of the opposite polarity as the input. Inverting (buck-boost). Ćuk - Output current is continuous. True buck-boost - The output voltage is the same polarity as the input and can be lower or higher. Split-pi (boost-buck) - Allows bidirectional voltage conversion with the output voltage the same polarity as the input and can be lower or higher. |
With transformer (isolatable) | Flyback - 1 transistor drive. |