Part Number: UCC28740EVM-525 Hi, On UCC2840EVM-525 schematics, we can find L1 220uH inductor between diode bridge and transformer. Could you please let us know the reason why L1 220uH inductor is needed?
Please advise us.
Thanks and best regards, M.HATTORI…
Part Number: UCC28740EVM-525 Hi Sir,
Is that possible that you can share UCC28740EVM-525 transformer(T1) design reference tool and detail spec for our reference?
Thank you for your kindly help.
Part Number: UCC28740EVM-525 Other Parts Discussed in Thread: UCC28740 , , UCC24612 , UCC28780 , UCC28056 Hi,
I'd like to seek your advise on UCC28740 Customer intends to design " 80-100W USB Type-C & Type-A Wall Charger "
Thank you for the query.
In short you cannot set frequency with resistor. These controllers are not fixed frequency PWM controllers like LM5021.The control will be based on control law described in page 16 of the datasheet.
You design the converter…
Part Number: UCC28740EVM-525 Other Parts Discussed in Thread: UCC28740 , LM5021
Tool/software: WEBENCH® Design Tools
Hi, I have some questions about UCC28740EVM-525.
1. When R8=0ohm, if Mosfet Rds is too small, will it be a inrush current while turn…
Part Number: UCC28740 Dear : Custom 's products is wall switch , the Schematic same as ucc28740EVM-525, But when load up to 5V 2A , The Surface of TVS D3 is too hot, the temperture up to 110°C. When check the mosfet Vds waveform as follow and…
Other Parts Discussed in Thread: UCC28740EVM-525 Hello ,
I have a question about UCC28740EVM-525. I have two questions about it.
question 1 :
i found in the secondary side there have a auxiliary circuit. i mean D7, R13, R14 and C9. i want to know what…
Lets say its 1000uF. Any voltage equation you know relating capacitor voltage of Cbuck(max) or Cout? I used Vbulk(max)=650 v, so 700v is okay?
Since output is 24V then how about 1000uF/50V?
I have few more query .
Here we go,
There are many application notes in the UCC28740 product folder that can help with your design.
The data sheet gives layout guidelines…