Half bridge DC-DC converter

A Half-Bridge DC-DC Converter is a type of isolated converter that efficiently converts one DC voltage level

Key Components of a Half-Bridge DC-DC Converter:

1. DC Input Source
2. Two High-Speed Switches (typically IGBTs or MOSFETs)
3. Two Capacitors in series – act as voltage divider (bias midpoint)
4. High-Frequency Transformer – provides isolation and steps voltage up/down
5. Output Rectifier (usually two diodes)
6. Output Filter (LC filter)
7. Controller (PWM driver)

🔄 Operating Principle:

• The two switches (S1 and S2) alternate to apply +Vdc/2 and –Vdc/2 across the transformer primary.
• The transformer converts this AC waveform to desired voltage level.
• On the secondary side, diodes rectify the signal, and an LC filter smooths the output.
• PWM control regulates output voltage.