Part Number: UCC28C55 Hello,
I am working on a dc/dc flyback design. I have the device working well with a 16V output and 600V input. My only real issue is I am seeing some pulse width oscillation at lower power. I am using a type 2 compensator on the…
Part Number: UCC28C55 Other Parts Discussed in Thread: UCC28C43 , UCC28C53 Hi
I have design DC DC Power Supply.
Input Voltage 15VDC to 60VDC / 80VDC to 400VDC
Output Voltage-5V/2A
Line/Load Regulation-1%
Efficiency - 85% or above
I have select IC UCC28C55…
Hi Amy,
I tried finding a test report for this part number in ti.com but no success. This part is recommended to be replaced with UCC28C55 which has a User Guide and Test Report included here UCC28C55 .
Also, I do not understand what you mean with the number…
Hi,
4 windings in one transformer is ok - it is just a single transformer structure. If you do similar to PMP9198, it would be ok.
Yes you can use UCC28C55-Q1 in your design.
No, it does not look to me CCM is good to your design - you have only 3mA and…
Part Number: UCC28C53 Other Parts Discussed in Thread: UCC28C55 , , UCC2800 , UCC28C54 Hi
I have design SMPS using UCC28C55 . I am start designing one solution on below both requirement. I have done schematic and also attached please review and comment. …
Hi,
I have seen datasheet UCC28C53(Duty Cycle-100%) and UCC28C55(Duty Cycle-50%). I have select UCC28C55.
Can you share reference design with Transformer data input 15V to 60V DC and 80Vto 400VDC with 5V/2A.
Moha,
Seems like you are really stressing the VCC and internal zener clamp as you are determined to apply your unregulated VCC voltage to the VCC pin. If you are applying 13.5V to VCC you are exceeding the recommended ABS MAX of 12V. And if you allow…
Hi Vishwanath,
The problem with using this controller for low VIN is the UVLO threshold:
You need to have the means to get the controller started. Once running it can work down to 15V.
A general-purpose PWM like the UCC28C55 could work for this range…
It looks like you found it! By the way, we have released the UCC28C55 which is pin-to-pin with the UCC28C45. The key differences are:
1. VDD raised to 30V - This can make D23 in your schematic unnecesary.
2. Maximum startup current is now 75uA (down from…