• UC2854A: Startup difference while working in different voltage

  

  Mr Jeeva

  Part Number: UC2854A Tool/software: We are using U2854A PFC driver in my circuit, we have calculated as per the recommendation expect the SS(soft start) capacitor, We didn't find any direct calculation and tool value from the reference. Now when we are…

  • 10 months ago
  • Power management
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Answered

• UC2854A: Multiplier output current - direction?

  

  Jim Brinkhurst1

  Resolved

  Part Number: UC2854A Hi experts Can someone confirm the direction of the Multiplier output current? Do the negative values in the table indicate current flowing out of the pin? Thanks! Jim B

  • Resolved

  • over 2 years ago
  • Power management
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• UC2854A: [Case:713749]Technical Data Inquiry

  

  Mohamed Salem2

  TI Thinks Resolved

  Part Number: UC2854A [Case:713749]Technical Data Inquiry SiliconExpert is contracted by our customer to work with their suppliers for accuracy and compliance. As this part "UC2854ADWG4" is valid and correct with its format according to this…

  • over 2 years ago
  • Power management
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• UC2854A: Maximum Multiplier Current

  

  Alex Rovnan

  TI Thinks Resolved

  Part Number: UC2854A Other Parts Discussed in Thread: UC2854 In the original version of the IC (UC2854) Multiplier current was limited to 3.75V/RSET. In this version of the IC, the datasheet indicates that maximum multiplier current is limited to…

  • over 4 years ago
  • Power management
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• UC2854A: UC2854ADW

  

  vivek nagal

  TI Thinks Resolved

  Part Number: UC2854A Hello, I am using UC2854ADW for 5kW PFC Boost converter (90V-270V Input AC and 400V Output) . I am facing some issue where PFC output voltage doesn't regulate and starts to rise gradually when the converter goes from full load to…

  • over 7 years ago
  • Power management
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• UC2854A: UC2854ADW

  

  vivek nagal

  TI Thinks Resolved

  Part Number: UC2854A Hello, I am using UC2854ADW for 5kW PFC Boost converter (90V-270V Input AC and 400V Output) . It was working fine until we got the new batch of these IC's where in when we go from full load to no load, the converter output voltage…

  • over 7 years ago
  • Power management
  • Power management forum
Answered

• UC2854A: Multiplier optimization / behavior of the IAC pin

  

  Andreas Schwarz

  Resolved

  Part Number: UC2854A Hi e2e, I try to improve the THD of my system (400Hz, 115V). Therefore, the multiplier of the PFC controller UC2854A must be improved. The inputs Vsense and Vrms are understandable, but not the IAC input. After the rectifier arise…

  • Resolved

  • over 6 years ago
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• UC2854A certification

  

  Wooseong Jeon

  Other Parts Discussed in Thread: UC2854A Did UC2854A pass UL certification and CSA certification?

  • over 11 years ago
  • Power management
  • Power management forum
Answered

• UCC28065: About High switching frequency(Higher than 500kHz) PFC IC, but don't need interleaving.

  

  ?? ?

  Resolved

  Part Number: UCC28065 Other Parts Discussed in Thread: UC2854A Tool/software: Hi team, I wanna ask if I use UCC28065 as a PFC converter, can I just use one output. I don't need interleaving and transition mode,but need high switching. Or you have…

  • Resolved

  • over 1 year ago
  • Power management
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• UC2854B: Understanding Current Limiting in UC2854

  

  Sundar Doraiswamy

  TI Thinks Resolved

  Part Number: UC2854B Other Parts Discussed in Thread: UC2854 , UC2854A Tool/software: We would like to understand the current limiting mechanism of the UC2854B PFC controller. In our design: The multiplier block receives inputs from: The DC output…

  • over 1 year ago
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