Part Number: UCC28C54-Q1 Tool/software: When starting a PSPICE simulation an error message pops up indicating the RPC (remote procedure call) server is unavailable. However, the RPC server and RPC locator are both set to automatic and both are running…
Part Number: UCC28C54-Q1 Tool/software: Hi.
I'm currently working on an isolated power supply. Based on what I looked up flyback topology seems to fit my specs (Vin ~ 24VDC, Vout = 24VDC, Iout = 5A).
I came across a few controllers - UCC28C4x and…
Part Number: UCC28C54-Q1 Other Parts Discussed in Thread: UCC28C54 Tool/software: Hello,
I recreated my simulation circuit for the UCC28C54 device in PSPICE after the model generated errors in LTSPICE. After completing the schematic and setting up what…
Part Number: UCC28C54 Hello,
I'm using UCC28C54 with an input voltage of 1000V max.
I used a resistors voltage divider so the VDD input voltage is 20V.
I'm currently investigating the situation of reverse polarity connection in the HV input. I couldn…
Part Number: UCC28C54
Tool/software:
Hi,
I would like to ask about EMI tests. I have cca 100W flyback without pfc, with UCC28C54 and Synchronious rectifier. Switching frequency cca 95 kHz. I tried to handle peaks caused by switching frequency by dumping…
Part Number: UCC28C54 Hi
I used the WEBench designer for an AC/DC design using the UCC28C54, and got the design in the attached PDF. I built it according to the design, but the UCC28C54 does not start. Digging into the details I notice two things. First of…
Hi Thomas,
The first waveforms that you showed me shows the converter switching correctly. This means that something is wrong with the feedback resistor divider and the output voltage reflected value. Please, verify your FB divider resistor.
Thank yo…
Part Number: UCC28C54-Q1 Other Parts Discussed in Thread: UCC28C54 Hi
I read the article on common mistakes in flyback power supplies (linked below) with great interest and took special notice about the OVP and OCP functionality. Then I dove into the UCC28C54…
Part Number: UCC28C54-Q1 Hi
In the datasheet page 35 a crossover frequency of 625 Hz is selected for the typcial application design exemplified in the datasheet, and then the error amplifier mid-frequency gain is determined to 14,6 V/V. How do I choose…
Part Number: UCC28C54-Q1
Hi
I have an AC/DC flyback converter designed for 240V AC --> 12V 84W DC. It's based mainly off a webench design and the datasheet typical application design. With a small load it outputs 12.2 volts. With 10 W load it outputs…
