Hi Harish
I am sorry to chase again, however, the request for the CE compliance status was raised two months ago and in our last exchange you were going to provide an update the following week but I have not heard back from you. Please kindly advise:
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Part Number: UCC28780EVM-021 Hi experts,
The transformer in the UCC28780EVM-021 user's guide, part number is 019-8916-00R.
I searched about this transformer datasheet and not find winding number only turn ratio. Could you please provide the winding…
Part Number: UCC28780EVM-021 Other Parts Discussed in Thread: UCC28781 , UCC28780 Q2 (P/N BSS126H6327XTSA2) of UCC28780EVM-021 has drain-source on-state resistance around 300 ohms (maximum 700 ohms). Could use use CPC3960 which has maximum on-state resistance…
Part Number: UCC28780EVM-021 Other Parts Discussed in Thread: UCC28780 We isolated the current to other extra circuits, VDD waveform became
However, failed to get output voltage and tried to measure VREF pin of UCC28780. VDD and VREF became
VDD changed…
Part Number: UCC28780EVM-021 Other Parts Discussed in Thread: UCC28780 The measure resistance on VREF pin is 28 ohms. We think UCC282780's VREF was damaged internally as all other external components connected to VREF are OK.. What condition would cause…
Part Number: UCC28780EVM-021 Hello Experts, My customer is now evaluating UCC28780EVM-021 and he has question as follows. Would you please answer it? 1. If customer short L3/L4 on EVM, the EVM will still work? or the EVM will not work(it will be broken…
Hi Harish,
I did the experiment you suggested and (of course...) the working board still works after replacing the controller...
So I started to desolder and measure every single resistor and capacitor connected to the controller on the broken board. …
Part Number: UCC28780EVM-021 Other Parts Discussed in Thread: UCC28780 Dear support member,
I used UCC28780EVM-021. I measured about waveform SW, Highside Gate, Lowside Gate, ILr.
I have a question.
（Wave form) At 90Vac, ILr rose from 0A when Q4（Lowside…
