Part Number: UCC28740-Q1 Tool/software: Hello
We are planning to use, UCC28740QDRQ1 and UCC28730QDRQ1 in our design, But we need it to operate over a temperature range of -55 to 150degC . But as per datasheet recommended operating temp is given as -40 to…
Part Number: UCC28740-Q1 Other Parts Discussed in Thread: UCC28730-Q1 , UCC28730 , UCC28740 Tool/software: Hi,
I am planning to use UCC28740-Q1 for flyback application with 40V - 1500V input and 12V output.
Can I use voltage feedback from auxiliary winding…
Part Number: PMP41009 Tool/software: Hi Linda,
When the VDD voltage reaches the opening threshold, is there necessarily three pulse detection failures?
Sometimes I can only detect one or two or four pulses and then it stop working. What might be the…
Part Number: UCC28740-Q1 Tool/software: Hi team,
We are planning to use this Part UCC28740QDRQ1 for one of our applications of flyback converter application which has to be operated over a temperature range of -55 to 125degC. The datasheet provides absolute…
Part Number: UCC28740-Q1 Tool/software: I am using the UCC28740-Q1 to design a flyback.
This IC includes the HV pin which provide the path to charge the VDD of IC during start up. However, after charging the VDD pin to turn-on level (CH2 reached 21V)…
Part Number: UCC28740-Q1 Other Parts Discussed in Thread: UCC28740 Tool/software: HI team,
A quick question on UCC28740, the Vin is 800V/400V DC voltage, output is 10V/2mA very light load, what's the input current for 400V and 800V respectively?
…
Part Number: PMP41009 Tool/software: Hi,
I made a flyback power supply with reference to PMP41009. But the switching frequency is not stable when a constant load is added. So what is the possible cause? What are the adjustments?
Thank you
Part Number: PMP41009 Other Parts Discussed in Thread: UCC28740-Q1 Hi,
I got some questions about UCC28740-Q1(Design reference PMP41009)
1. The recommended primary side ratio Nps of the transformer is 43.86, But this means a too much primary inductance…
Part Number: PMP41009 Hello Linda,
TVS is used for voltage clamp in the design of PMP41009 and the clamp voltage VC of P6KE300A is 414V, So how to ensure that it will not exceed the maximum voltage of HV pin 700V?
What should I consider when choosing…
