Other Parts Discussed in Thread: UCC28061 Hi,
In continuation of the previous post which I made ("UCC28061: Power MOSFETs blown up sometimes") I want to share the new measurement with you and exploring the possible issue with the MOSFETs in…
Hello,
Did you look at the current through the FETs? I did not see this on your curves. I was thinking that you may see an over current going through them.
Also worth mentioning that you are bandwidth limiting your voltage probes. You may be missing…
Hello,
You are correct that adding a gate drive resistor will increase the losses of the FET. This will be due to having less current to charge and discharge the gate capacitance of the FET. This will result in increased switching losses. However, the…
Part Number: UCC28061 Hello Team,
Could you kindly help me see if the below waveforms are a common issue for PFC Controller?
Here are the issues my customer is facing:
When the output is no-load, the two gate outputs work in phase (It should be 180…
Part Number: UCC28061 Hello,
WE would like to use UCC28061 in our mainstream products as this is only controller currently available on the market .
But we found a problem. During start-up with low line voltage (90Vrms) even at very low load (5W) , the…
Part Number: UCC28063 Other Parts Discussed in Thread: UCC28061 Dear Expert
Ctm change UCC28063 to UCC28061 ,and system fails to start .The Pin5 COMP is low lever ,other pin voltage are normal.
Below is schemetic ,pls check! 24v8a.pdf
Please tell me the details of the operation of the hysteresis control mode.
(Relationship between COMP voltage and GDA and GDB operation)
The answer is that GDA or GDB may operate independently in the hysteresis control mode, but is it determined by the…
Part Number: UCC28065 Other Parts Discussed in Thread: UCC28061 Hi
Is it possible to design a bridgeless PFC using UCC28065?? Or is there any IC that can achieve CRM bridgeless PFC??
Thank you
Part Number: UCC28061 Other Parts Discussed in Thread: UCC28064A Hi Support team
In order to control PHB into single phase stage, the COMP voltage is key factor,
what conditions that will affect the COMP voltage (VINAC? TEST? VSENSE? Choke parameters…