Part Number: UCC28740 Hi team,
Could you let me know the reason why quasi- is removed from UCC28740 datasheet?
I'd like to suggest UCC28740 as a QR controller alternative of competitor solution.
But somehow the datasheet doesn't clearly states it…
Part Number: UCC28740 Tool/software: Hi,
We are currently investigating an issue related to oscillation stop behavior in the UCC28740. Although the exact root cause has not yet been identified, we have observed the following phenomena in the customer…
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…
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…
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…
Part Number: UCC28740-Q1 Tool/software: Hi Team
Customer is using UCC28740Q1 to design a 100W flyback power.
They found that there were two different work conditions when it enters constant current mode, and the constant current level would be higher…
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 side…
Part Number: UCC28740 HV power supply: 300V
The partial circuit is as follows:
The test waveform is as follows: Channel 2 represents the signal from the DRV pin, and Channel 3 represents the signal from the VDD pin (in the picture, the ratio conversion…
Part Number: UCC28740 Tool/software: Based upon WBSchematicUCC28740DR.svg (attached) there is never any DRV output. The only waveform is on pin 1. Attached Vicor VI-J51_N3.pdf
Part Number: UCC28740 Dear Experts,
The customer is using UCC28740 to make a flyback power supply. At present, there are some problems in debugging. The following is the design schematic diagram and summary of the situation. I hope experts can help…
