• UCC28740-Q1: Enable circuit

  

  Peter Xu

  TI Thinks Resolved

  Part Number: UCC28740-Q1 Other Parts Discussed in Thread: UCC28740 Hi team, My customer uses UCC28740-Q1 and they want to enable and disable this circuit with a MCU GPIO(like EN pin on other device). However, UCC28740-Q1 has no EN pin. Question: …

  • 1 month ago
  • Power management
  • Power management forum

• UCC28740-Q1: Seeking SPICE/TINA-TI Model for UCC28740 or Equivalent (Alternative to SIMPLIS)

  

  Yakshraj Sharma

  TI Thinks Resolved

  Part Number: UCC28740-Q1 Other Parts Discussed in Thread: UCC28740 , TINA-TI , UCC28730 Hi TI, I am currently try to simulate a flyback converter based on the UCC28740 isolated flyback controller. While I have accessed the SIMPLIS model provided on…

  • 7 months ago
  • Power management
  • Power management forum

• UCC28740-Q1: What are the criterions that UCC28740 enters special start-up mode?

  

  Harry Ma

  Part Number: UCC28740-Q1 Tool/software: Hi Team Customer is using UCC28740Q1 to design a 100W flyback power. They found that there were two different work conditions when it enters constant current mode, and the constant current level would be higher…

  • over 1 year ago
  • Power management
  • Power management forum

• UCC28740-Q1: UCC28740-Q1 and 2. UCC28730-Q1

  

  Jithin Elimban

  TI Thinks Resolved

  Part Number: UCC28740-Q1 Tool/software: Hello We are planning to use, UCC28740QDRQ1 and UCC28730QDRQ1 in our design, But we need it to operate over a temperature range of -55 to 150degC . But as per datasheet recommended operating temp is given as …

  • over 1 year ago
  • Power management
  • Power management forum

• UCC28740-Q1: Turn on threshold temperature drift?

  

  Harry Ma

  TI Thinks Resolved

  Part Number: UCC28740-Q1 Tool/software: Hi Team If the following turn on threshold voltage rang considers the temperature change drift? or it is typical value at 25℃？

  • over 1 year ago
  • Power management
  • Power management forum

• UCC28740-Q1: The transfer function of UCC28740-Q1

  

  shilin.liu

  TI Thinks Resolved

  Part Number: UCC28740-Q1 Hi， Can you tell me the transfer function (Vo(s)/VFB(s)) of UCC28740-Q1? thank you very much!

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

• UCC28740-Q1: No PWM Output with 24V VDD

  

  Tom Tsao

  Resolved

  Part Number: UCC28740-Q1 Other Parts Discussed in Thread: UCC28740 Tool/software: Dear TI Support Team, I am currently working with the UCC28740-Q1 in my application and have encountered an issue. I applied 24V to the VDD pin of the IC, but I observed…

  • Resolved

  • over 1 year ago
  • Interface
  • Interface forum

• UCC28740-Q1: Alternate IC for UCC28740-Q1

  

  Manu P

  Part Number: UCC28740-Q1 I want to design a two switch flyback (400V-15V 1.5A).I have come across the IC UCC28740-Q1.But the maximum switching frequency of this IC is found to be 100Khz.We need a bit higher swicthing frequency.Could you suggest any alternate…

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

• UCC28740-Q1: Auxiliary voltage feedback at FB pin instead of optocoupler

  

  Ponkamali P

  Resolved

  Part Number: UCC28740-Q1 Other Parts Discussed in Thread: UCC28730-Q1 , UCC28730 , UCC28740 Tool/software: Hi, I am planning to use UCC28740-Q1 for flyback application with 40V - 1500V input and 12V output. Can I use voltage feedback from auxiliary…

  • Resolved

  • over 1 year ago
  • Power management
  • Power management forum
Answered

• UCC28740-Q1: No PWM generation after starting up

  

  Tung Nguyen Tan

  Resolved

  Part Number: UCC28740-Q1 Tool/software: I am using the UCC28740-Q1 to design a flyback. This IC includes the HV pin which provide the path to charge the VDD of IC during start up. However, after charging the VDD pin to turn-on level (CH2 reached 21V…

  • Resolved

  • over 2 years ago
  • Simulation, hardware & system design tools
  • Simulation, hardware & system design tools forum

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