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Tool/software:
Dear Sir,
I am currently designing a DC-DC converter using the PSFB configuration, with an input voltage range of 16.8V to 90V and an output of 48V at 30A. I require both constant current (CC) and constant voltage (CV) monitoring, utilizing the UCC28951-Q1 IC.
I understand that I need to short the EA- (pin 3) and COMP (pin 4) pins, and connect a comparator to the EA+ (pin 2) pin. However, I would appreciate your guidance on the calculation of the resistor divider for this setup.
Hello,
The following link will bring you to a 2kW UCC28951 in a battery charger. The controller is setup to use constant current constant voltage mode design. There is a schematic for your to reference that shows how to setup the feedback to achieve constant current constant voltage mode control design.
https://www.ti.com/tool/PMP8740#tech-docs
The following links will bring you to an application brief that reviews the design process of this 2 kW reference design.
https://www.ti.com/lit/pdf/slup348
https://www.ti.com/lit/pdf/slup349
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Regards,