Part Number: UCC28740 Tool/software: TI provides the UCC28740, which is known as a flyback converter, and I would like to proceed with the design while seeking assistance.
Below are the design specifications:
Vin : 250~1000Vdc
Vout : 24V
Pout : 300W
E…
Part Number: UCC28740 Tool/software: Hi,
Please help to check our schematic and there are no 12V output voltage for our design:
We have below issue:
1. The VDD waveform(Yellow line) and DRV waveform(Blue line), is it right?
2. We want the input voltage…
Part Number: UCC28740 Tool/software: Hi,
I have submitted the issue in the other thread and you suggest us to use the ucc28740 design calculator, please refer to below and provide your comment if there are any paramater need to modify.
BTW, please advise…
Part Number: UCC28740 Other Parts Discussed in Thread: TIDA-00702 Tool/software: Hi,
We has a new design for the auxiliary power supply, and our spec. for below:
1. We need to auxiliary power supply output is 24V/3.3A(fully loaded);
2. The output use the …
Part Number: UCC28740 Tool/software: Hi Team,
Do we have detailed documentation of the device startup process? Customers want to see how the duty cycle changes during the startup process. Thanks in advance.
BRs,
Francis
Part Number: UCC28740 Tool/software: Hi Team,
Customer ask whether this device can work in <85Vac input condition, datasheet mentions that cannot, if cannot, what's the reasons? Thanks.
BRs,
Francis
Part Number: UCC28740 Tool/software: Thanks for the reply. You were right, of course, about the three DRV pulses. I have attached the resulting waveforms at testpoint Vsw, after recommended changes per sluaac5.pdf Figure 1.1 were made on the primary…
Part Number: UCC28740-Q1 Tool/software: Hi Team
If the following turn on threshold voltage rang considers the temperature change drift? or it is typical value at 25℃？
Hi Mike,
As you suggested, customer to test UCC28740 with a PCB. They find that CS trigger protection. The test condition is below: Vin = 350V, Vout=24V, load=0.7A. Could you help give trouble screen suggestions? The schematic is the same as UCC28740…
