• UCC28070A: UCC28070 - 3500W

  

  Rajasekaran S1

  TI Thinks Resolved

  Part Number: UCC28070A Hi Team, I am using UCC28070A for 3500W PFC, in that during testing issues of CSA & CSB Signals are not equal, CSA going in negative by -2V due to that one section is not working. Thanks & Regards, S.Rajasekaran

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

• UCC28070A: Synthesized Questions of UCC28070A (continued)

  

  Jankel

  TI Thinks Resolved

  Part Number: UCC28070A Hi John, 1, So,during inrush surge events at power up and AC drop-out recovery, VVSENSE < VVINAC, the synthesized downslope becomes zero like the blue curve I drawn below? 2, During normal operation, off-time down-slope…

  • over 6 years ago
  • Power management
  • Power management forum

• RE: UCC28070A: UCC28070A Single Phase PFC, DC input works, AC input does not work, no even one switching event

  

  Jankel

  Hello John, Other information is not useful to this question. Control Loop is definitely stable based on my small-signal modeling and compensation calculation which is already verified by my simulation, so I didn't show the initial control loop…

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

• UCC28070A: except frequency extend, what's any other difference between UCC28070 and UCC28070A?

  

  Max Han

  TI Thinks Resolved

  Part Number: UCC28070A Other Parts Discussed in Thread: UCC28070 , Hi except frequency extend, what's any other difference between UCC28070 and UCC28070A? or is there any improvement on UCC28070A? thanks.

  • over 6 years ago
  • Power management
  • Power management forum
Answered

• UCC28070A: Whether it is a replaceable product

  

  Yuki Saito

  Resolved

  Part Number: UCC28070A Other Parts Discussed in Thread: UCC28070 , Dear application team Customer is using UCC28070PWR . but customer UCC28070PWR order was pushed out. so they are finding alternative devices. UCC28070 A PWR is replaceable…

  • Resolved

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

• RE: UCC28070A: Power management forum

  

  Rajasekaran S1

  Hi Ben, Please help us for solving the problems. Thanks Rajasekaran S

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

• UCC28070A: Can we use just one of the PFC stages for an initial test prototype?

  

  Andrew Massey

  TI Thinks Resolved

  Part Number: UCC28070A Other Parts Discussed in Thread: UCC28070 Hi, We have designed a PFC using 2 UCC28070A's....but just want to populate one PFC stage for our initial test...so can we drive just one PFC stage with the UCC28070A to start off with…

  • over 3 years ago
  • Power management
  • Power management forum

• UCC28070A: Power versus mains

  

  user3863678

  TI Thinks Resolved

  Part Number: UCC28070A Hello I am designing a 1500W PFC based on UCC28070A. Requirements are 1500Watt from 120VAC to 264VAC, below 120VAC i use peak limit to limit power. The problem is that from 230VAC to 264VAC the output power goes from 1500watt…

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

• RE: UCC28070A: Synthesized Questions of UCC28070A

  

  John Griffin1

  Hello Jankel, The inductor current during the FET off time is synthesized by discharging an internal capacitor during the FET off time. For normal operation the slope of this signal has a positive value. The downslope becoming " zero" means is that it…

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

• UCC28070A: Reset network

  

  Yuto Sakai

  TI Thinks Resolved

  Part Number: UCC28070A Other Parts Discussed in Thread: UCC28070 Hi, What is the reason for connecting the circuit called Reset Network in Figures 25 and 26? Are there any documents that describe how to design and select parts? Best regards, Yuto Sak…

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

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