Half-Bridge DC-DC Converter With Primary-Side Control

Hemalatha Mekala

Introduction:
The example uses a UCC28250 PWM controller from TI to realize a DC-DC symmetrical half-bridge topology with primary-side control that converts 36V to 72V DC to a regulated output voltage of 3.3 V with 23A maximum load current. The design is based on the EVM from TI using UCC28250. The nominal input voltage is 48V. The controller UCC28250 is modeled using the MAST language in SaberRD.

FEATURES:
• Output voltage regulation from no load to full load.
• Control driven synchronous rectifier.
• Voltage mode control.
• Non-latching input over voltage protection.
• Hiccup over current protection.

Circuit Snapshot:



How to Run the Example:
1) Download the attached "half_bridge_dc_dc_converter_v1.zip" and unzip the contents.
2) Open the design "half_bridge_dc_dc_converter_v1.ai_dsn" in SaberRD.
3) Run the experiments listed in the Experiment Analyzer.

For more details of the design, how to run the design, etc., refer to the README.pdf file in the attachments.


Note:
This design example works only in SaberRD commercial edition O-2019.06 and above.