• UC3854A: Buck PFC - Application note

  

  Jeheu Jesse Dela Cruz

  TI Thinks Resolved

  Part Number: UC3854A Other Parts Discussed in Thread: UCC29910A Tool/software: I wanted to use UC3854A as a Buck PFC controller, utilizing its power limit feature. Upon following the application instructions DN-66, I can't seem to regulate the output…

  • 4 months ago
  • Power management
  • Power management forum

• UC3854A: Current sense resistor selection

  

  C.S.

  TI Thinks Resolved

  Part Number: UC3854A Other Parts Discussed in Thread: UC3854 , Tool/software: We are building a circuit based on the UC3854. Input current up to 20A, will result in a substantial dissipation on the current sense resistor. Normally for the smaller converters…

  • 10 months ago
  • Power management
  • Power management forum

• UC3854: UC3854 vs UC3854A differences

  

  HS FAE Germany

  TI Thinks Resolved

  Part Number: UC3854 Hello, customer is searching for a drop-in-alternative (or ptp) for the UC3854DWTR. Can he use the UC3854A? What are the differences? Regards, Holger

  • over 2 years ago
  • Power management
  • Power management forum

• UC3854A: UC3854A: INPUT CURRENT IS DISTORTED AND HAS LARGE SPIKE AT ZERO CROSSING

  

  JESSIE CAO

  TI Thinks Resolved

  Part Number: UC3854A Hi John, I saw my customer engineer Xu hong in US contacted with you in E2E, Since Xu hong is my customer engineer he didn’t buy TI parts but checking for technical issues, I guess he didn’t talk to you about the orders I placed to…

  • over 5 years ago
  • Power management
  • Power management forum

• RE: UC3854A: INPUT CURRENT IS DISTORTED AND HAS LARGE SPIKE AT ZERO CROSSING

  

  hong Xu

  Hi John, The app note is also officially published by TI. It suggests designers to double the input current from 250mA to 500mA. And also, please check all your typical application circuits, all are using 500-600mA range. Can you please tell me why? By…

  • over 4 years ago
  • Power management
  • Power management forum

• UC3854A: Recently, we have found UC3854ADW, TI on our PCBA does not work properly.

  

  JESSIE CAO

  Part Number: UC3854A Hi John, I saw my customer engineer Xu hong in US contacted with you in E2E, Since Xu hong is my customer engineer he didn’t buy TI parts but checking for technical issues, I guess he didn’t talk to you about the orders I placed to…

  • over 5 years ago
  • Power management
  • Power management forum
Answered

• UC3854A: Buck Converter using UC3854A

  

  Ratish Ganve

  Resolved

  Part Number: UC3854A Other Parts Discussed in Thread: UC3854 , UCC28180 , Hi, In application note of UC3854, I read that this IC can also be used to configure Buck converter. Please can anybody let me know how to configure it for the same & what modifications…

  • Resolved

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

• UC3854A: AC TO DC

  

  SAMRAT PUJARI

  Part Number: UC3854A Other Parts Discussed in Thread: UC3854 , Hello how to make use of uc3854 for three phase pfc? any reference designs? thanks samrat

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

• UC3854A: current peaks at zero-cross

  

  Vitaly Baranov

  Other Parts Discussed in Thread: UC3854A Hello. I am using UC3854A for 2500W PFC. I have encountered a problem of large current peaks on zero-cross. The amplitude of peaks depends on the value of Rmo & Rci - the larger the value, the larger the amplitude…

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

• uc3854a current sensing using transducer?

  

  manikandan selvam

  Other Parts Discussed in Thread: UC3854A , UC2854 Hi genius, AC/DC boost converter with PFC controller. Input : 180-270Vac Output Power = 6kW Output voltage = 400 vdc Output Load = 15A PFC controller chosen = UC3854a My question is, How i sense the current…

  • over 13 years ago
  • Power management
  • Power management forum

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