• UCC28631: Soft Start

  

  Aaron Spaete

  TI Thinks Resolved

  Part Number: UCC28631 Other Parts Discussed in Thread: UCC28630EVM-572 , , UCC28630 , UCC28632 , UCC28633 Team, My customer has the following questions: Is there a soft-start mechanism? (Datasheet says yes but not much info) How does the soft…

  • over 7 years ago
  • Power management
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Answered

• UCC28631: Load Transient

  

  Hirotsugu Kobayashi

  Resolved

  Part Number: UCC28631 Other Parts Discussed in Thread: UCC24650 Hi, team. Out customer is evaluating a load response test in UCC28631. In a transient test from zero load, very big drop is observed. But test from sub mA load, it is improved. Is…

  • Resolved

  • over 8 years ago
  • Power management
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Answered

• ucc28631: DC Input

  

  John Lee11

  Resolved

  Part Number: UCC28631 Hi, The from calculation spreadsheet what do I input for DC input voltages?

  • Resolved

  • over 8 years ago
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• UCC28631: Very Slow Ripple

  

  Hirotsugu Kobayashi

  Part Number: UCC28631 Hi, team. Our customer designed 15W(12V/1.25A) adaptor using UCC28631. But very slow output ripple is observed, time period is about 180~200Hz and peak-to-peak ripple voltage is about 200mV Could you think any reason? Where…

  • over 8 years ago
  • Power management
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Answered

• UCC28631: Vdd(ovp) timing

  

  Hirotsugu Kobayashi

  Resolved

  Part Number: UCC28631 Hi, team. When does Vdd (ovp) become effective? Does it become after soft-start? Best Regards,

  • Resolved

  • over 8 years ago
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Answered

• UCC28631: Over Power Mode

  

  Hirotsugu Kobayashi

  Resolved

  Part Number: UCC28631 Other Parts Discussed in Thread: UCC28630 Hi, team. Does UCC28631 have a Over-Power Mode? Is the Maximum Output Power of UCC28631 100% of Pnom?

  • Resolved

  • over 8 years ago
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Answered

• UCC28631: Startup time

  

  Linh Dang74

  Resolved

  Part Number: UCC28631 On the datasheet page 15 the worst case startup time is 1.002s can this startup be lower? I am connecting to a 180VDC source.

  • Resolved

  • over 8 years ago
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• UCC28631: Vcs(max) min/max value

  

  Hirotsugu Kobayashi

  TI Thinks Resolved

  Part Number: UCC28631 Hi, team. Please tell me the min/max value of Vcs(max). Datasheet is described typical 800mV only. Best Regards,

  • over 8 years ago
  • Power management
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Answered

• RE: UCC28631 not starting up

  

  dan lafferty

  Resolved

  Bernard, I had found and bypassed that long ago by running it off of a separate rectifier. What I was seeing was the output flying high instead at low frequencies. I did not test to see WHEN it came down but it was at 60mA load so I did not care…

  • over 8 years ago
  • Power management
  • Power management forum
Answered

• RE: UCC28631 Latching off on (re)power

  

  Patrick York

  Resolved

  Thank you for your fast response and detailed answer! Checking the code at the SD pin, it is indeed fault #23. The HV pin is connected to V_Bulk through two series 100k resistors, and the explanation given is consistent with other circuit behaviors…

  • over 9 years ago
  • Power management
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