Other Parts Discussed in Thread: UCC28781-Q1 , UCC28782 , UCC28781 Tool/software: Hi,
I am designing isolated DC to DC converter for EV 2w/3w automotive application with following specification.
Electrical: DC-DC Converter (72V to 12V) Input Voltage: 72V…
Part Number: UCC28781-Q1 Other Parts Discussed in Thread: UCC28781 , UCC28782 Hello,
I am going through the design steps in the datasheet of UCC28781-Q1 to design a AC - DC converter. But I am stuck at VBUR calculations in 8.2.2.4 which says
"The procedure…
Part Number: UCC28781 Other Parts Discussed in Thread: UCC28782 Dear Experts,
I am in search of a topology for a 65W adapter with Power Delivery (PD) functionality.
I am currently considering two topologies: Active Clamp Flyback (ACF) and Active High-Side…
Part Number: UCC28781 Other Parts Discussed in Thread: UCC28782 Hi Team,
My customer is surveying suitable Flyback controller solution to meet -
347~480Vac_in / 60Vdc_out / 90W requirement
Do you have any suggestion here?
Thanks.
Part Number: UCC28781 Hello TI,
Is there an input overvoltage protection?
I have a dual 24V 0.85A and 24V 0.18A output transformer with Vin 30-72V.
As i reach 85V, it starts to make some strange noise and at around 86V it stops switching, then i need…
Part Number: UCC28781-Q1 Other Parts Discussed in Thread: TL431 Hello TI,
Would it be a good idea to place the voltage feedback signal "VOUT" after the L403? Currently its at before the CM choke but it complicates the polygon pours + spreads the noisy…
Part Number: UCC28781 Other Parts Discussed in Thread: ATL431
Hello TI,
Under 5k load on both outputs, there is a painful squeaking, sometimes hissing sound, seems to depend on Vin. Until around 52Vin, its a pleasant audible noise but as higher Vin it…
Part Number: UCC28781-Q1 Can R37, R38, R20 be replaced by a single 19.6k resistor? What purpose do D11 and D12 serve? What consequences will occur if they were to be removed?
Thanks
Hello Ulrich,
The thread can be closed, although i have not suceeded in making it work with a 4mH transformer. It did work with some off the shelf 800uH, which indicates that most likely the parasitics was the cause.
We did not have the time to troubleshoot…