• UC3854B: Variation of Input offset voltage

  

  Shuji Ishiwata

  TI Thinks Resolved

  Part Number: UC3854B Other Parts Discussed in Thread: UC3854 Hi All, I have a question about the UC3854B. Is there a distribution map documnet that shows the variation in Input offset voltage below? Best Regards, Ishiwata

  • over 2 years ago
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Answered

• UC3854B: UC3854BN replacement

  

  Jiandong Liu

  Resolved

  Part Number: UC3854B Other Parts Discussed in Thread: UC3854 Hi Expert, Do we have any P2P replacement of UC3854BN? Or if customer can change layout, do you have suggestion parts? Regards, Jared.

  • Resolved

  • over 3 years ago
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• UC3854B: conducted emission reduction

  

  SMPL

  Part Number: UC3854B Other Parts Discussed in Thread: UC2526 Respected sir, we are doing the EMI/EMC test of our SMPS(1600W) . It is failing at high frequency (Greater than 20 MHz) region during conducted emission test. We are using PFC Controller…

  • over 3 years ago
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• UC3854B: UC3854B

  

  Russell Hammad

  Part Number: UC3854B Hi, My current problem with the UC3854B is that the output dc voltage changes with the input and is not constant at any range of the input voltage. What can be the reason for that? Russell

  • over 5 years ago
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• UC3854B: uc3854b

  

  Russell Hammad

  TI Thinks Resolved

  Part Number: UC3854B Other Parts Discussed in Thread: UCC29910A I am not getting the PFC design to work properly and my output voltage level was less than input. Also the current waveform was badely distorted. My input voltage varies from 5 to 70 v…

  • over 5 years ago
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• UC3854B: uc3854b

  

  Russell Hammad

  Part Number: UC3854B Other Parts Discussed in Thread: UC3854 Hello, I am using the UC3854B for PFC application ,but was not getting the results needed,the voltage level was lower that the input and the current waveform was badly distorted. The input…

  • over 5 years ago
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• UC3854B: PFC design isses with UC3854B

  

  Seshaiah Bandla

  TI Thinks Resolved

  Part Number: UC3854B Hi , I am using UC3854B PWM IC in my PFC design. I am referring functional block diagram and found SR flip flop inputs named as RRS. Is it a printing mistake or else some thing else. I feel one is clock (CLK) and other two are…

  • over 6 years ago
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• UC3854B: UC3854

  

  Russell Hammad

  Part Number: UC3854B Other Parts Discussed in Thread: UC3854 , , UC2854B I AM STILL WAITING FOR A REPONCE

  • over 5 years ago
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• UC3854B: Gate output oscillation

  

  Mason Noh

  TI Thinks Resolved

  Part Number: UC3854B Hi TI, Could you help to review the schematic as attachment? Actually, we have a issue with the oscillation of gate output. Some ICs on the same board have this oscillation and others do not have this problem.

  • over 6 years ago
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• RE: UC3854B: Enhance gate freq & FET Vds problem

  

  John Griffin1

  Hello benhsiao , You are seeing a slow turn off of the FET because the gate drive output of the UC3854B is not able to perform a fast turn off of the FET at this high switching speed. Are you driving the FET directly from the ic ? Regards John

  • over 6 years ago
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