Part Number: UCC28704 Hi Team,
As per the suggestion , we have tried reducing the start up resistors with 5ME(initially it was 10ME) and also tried some combination of resistors(reduced values) to check if the VDD voltage is high (21V) but it is stabilizing…
Part Number: UCC28704 Hi Team,
I have a customer that is interested in having their schematic reviewed to make sure everything is good to go for production. Could someone please reach out to assist here?
Thank you.
Best, Dajon McGill
Part Number: UCC28704 Dear team,
The result of the transformer calculation of the datasheet (Lp=5mH, NPS=13) and results of WEBENCH are different. Which should I design? WBDesign3_7V0.7A_120-250Vin.pdf
Regards, PAN-M
Part Number: UCC28704 Hi,
We are using UCC28704 as an auxilary supply. We used the webench design tool for the design
12V_AUX_SUPPLY.pdf
Can you tell the part number for the transformer used in the design?
Thank-you
Warm Regards
Harini Krishna
Part Number: UCC28704 Hi Team,
My customer now is evaluating UCC28704 for Aux-power supply design, and they encounter an critical issue for the valley switching that valley-switching feature not realized and DRV turn on at very high voltage, could you…
Part Number: UCC28704 Other Parts Discussed in Thread: TINA-TI I downloaded the SPICE model UCC28704 from the official TI website. I can't add SPICE model to TINA TI program (v9 version and demo version v12). I can't understand why I don't have the "Library…
Part Number: UCC28704 Dear TI team,
We have designed an SMPS based on the reference circuit provided by TI. We are using a custom transformer which is tested by the manufacturer. The test report is attached here along with the datasheet. This transformer…
Part Number: UCC28704 Dear team.
Please teach me whether the following calculation right.
VIN=AC100V, VOUT=7V/5W
Dmax is about 40% by Nps=10=(Dmax) x 90Vdc/ (0.475x(7+0.5)) expression. As Dmax is around 48%, according to the calculating formula of the…
Part Number: UCC28704 Hi,
I'm developing UCC28704.
Why in the section 7.3.1.5 of the datasheet the value of RCS needs to be divided by two times of IOCC? where does this 2 come from?
Hello,
Based on the specifications you provided, I have three recommendations in mind.
1. UCC28704 - this is a low cost, highly efficient flyback with valley switching. This flyback is DCM, helping the controller be more stable.
2. UCC28C5x - this PWM…