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Utilize LM5113 evaluation board

Posted: 20 Mar 2012 ?? ?Print Version ?Bookmark and Share

Keywords:half-bridge? synchronous buck converter? FET driver?

National Semiconductor LM5113 evaluation board is designed to provide the design engineers with a synchronous buck converter to evaluate the LM5113, a 100V half-bridge enhancement mode Gallium Nitride (GaN) FET driver. The active clamping voltage mode controller LM5025 is used to generate the PWM signals of the buck switch and the synchronous switch. The specifications of the evaluation board are as follows:

???Input Operating Voltage: 15V to 60V
???Output Voltage: 10V
???Output Current: 10A @ 48V, 7A @ 60V
???Measured Efficiency at 48V: 93.9% @ 10A
???Frequency of Operation: 800kHz
???Line UVLO: 13.8V (Rising) /10.8V (Falling)
???Board size: 3.00 x 2.83 inches

The printed circuit board consists of 2 layers of 2 ounce copper on FR4 material, with a thickness of 0.050 inches.

This application note contains the schematic of the evaluation board, Bill of Materials (BOM) and a quick setup procedure. The evaluation board can be reconfigured for different switching frequency, dead time, and the output voltage from the specifications above. An example of 48V to 3.3V conversion is given in the appendix. Refer to the datasheet of the LM5113 for more complete information.

View the PDF document for more information.

Originally published by National Semiconductor at as "LM5113 Evaluation Board".

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