Part Number: UCC28C40 Tool/software:
I am Referring to Webench circuit of UCC28C40.U4 is symbol name for the UCC28C40. When i apply a supply of 85V to 265V , no voltage reaches the UCC28C40, resulting in no waveform at RT/CT pin and the output pin
Part Number: UCC28C40 Tool/software: Dear sir,
I want to stimulate SMPS circuit on LtSpice and TINA TI but facing some issues.
1. On LTSpice, the IC UCC28C40 is not working even after providing the biasing voltage. I have enclosed the same.
2. On Tina…
Part Number: UCC28C40 Other Parts Discussed in Thread: TL431 Tool/software: Hi，
UCC28C40 was tested at a high temperature of 70 degrees Celsius, and when outputting a load of 1A, the output voltage was too high. The designed output voltage of the product…
Part Number: UCC28C40 Tool/software: Hi expert,
This is Shenzhen FAE Evan, my customer found this PWM output below in light load scenario. Can you help clarify if the PWM wave is normal for UCC28C40 in light load scenario? I feel it seems go in pulse…
COMP is normally pulled up to VREF (5V) and this naturally limits the COMP voltage to Vcomp<5V. You are measuring COMP voltages of 5.3V and 5.8V. Can you provide a schematic showing how the COMP is connected and what is the pullup volatge?
Steve
Part Number: UCC28C40 Other Parts Discussed in Thread: UCC28C41 , Hi team, there is an urgent issue from our customer anker, Could you give some suggestions?
the SCH is as the follow picture
...
Key issue : 1.12V input and 34 V output, t he system fails…
Part Number: UCC28C40 Other Parts Discussed in Thread: TINA-TI , Tool/software: Hello,
I am working with a UCC28C40 chip in TINA-TI. The objective of the design that can be seen in the image is to change an input voltage of 540V DC to an output voltage…
