• UCC3818: App note about light load operation of UCC3818?

  

  Andrew Massey

  TI Thinks Resolved

  Part Number: UCC3818 Hi, Figure 2 page 2 of the below App note shows R1, R2 and Q1....the idea is that Q1 turns off when VAOUT goes less than 1V...but would you agree, the circuit shown could not reliably do that.....instead a comparator would be needed…

  • 3 months ago
  • Power management
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• UCC3818: Please advise of a App Note for feedback loop calculation with UCC3818?

  

  Andrew Massey

  TI Thinks Resolved

  Part Number: UCC3818 Other Parts Discussed in Thread: UC3854 Hi, Hope thsi finds you well Please advise of a App Note for feedback loop calculation with UCC3818?

  • 3 months ago
  • Power management
  • Power management forum

• UCC3818: How to add mitigation for mains zero crossing distortion?

  

  Andrew Massey

  TI Thinks Resolved

  Part Number: UCC3818 Hi, Some ti.com PFC controllers require a resistor to be fitted between VREF pin and IAC pin, such that the zero crossing distortion is avoided. How is this done for the UCC3818?

  • 3 months ago
  • Power management
  • Power management forum
Answered

• UCC3818: Simplis Model for UCC3818

  

  Ruqi Li

  Resolved

  Part Number: UCC3818 I wonder if TI offers a Simplis model for this popular part? Thank you!

  • Resolved

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

• UCC3818: To clarify why there is no UCC3818 DRVOUT during AC input lost.

  

  Eric Lai

  Resolved

  Part Number: UCC3818 Hi Expert, Will need to clarify why there is no DRVOUT during AC input lost. Conditions: --PFC stage is running under AC input --Turn off the AC input for serval AC cycle (60Hz) then turn on the AC input back --VCC is in the biased…

  • Resolved

  • over 1 year ago
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  • Power management forum

• UCC3818A: Can UCC3818 run into open loop mode

  

  Eric Lai

  TI Thinks Resolved

  Part Number: Hi Expert, The engineer is asking how to run the UCC3818 into the open loop mode. They are thinking to inject a DC level into CAOUT pin. Then PWM width can programmed by the this DC level. Pls advice whether this is workable or not. …

  • over 1 year ago
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  • Power management forum
Answered

• UCC3818: To clarify the PKLIMIT function

  

  Eric Lai

  Resolved

  Part Number: UCC3818 Hi Expert, Would like to know the detail of PKLIMIT behavior. According to the block diagram of PKLIMIT,once the threshold is triggered from this PIN.The DRVOUT should be disabled. The question is about once there is continuing current…

  • Resolved

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

• UCC3818A: To apply the UCC3818 for 220VDC to 380VDC input applicant

  

  Eric Lai

  Resolved

  Part Number: UCC3818A Other Parts Discussed in Thread: UCC3818 Hi Expert, The engineer would like to consider to leverage their mature AC-DC design that adopted the UCC3818 inside for 220VDC to 380VDC input applicant instead. The difference is one from …

  • Resolved

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

• UCC3818: What's internal PWM gain of UCC3818

  

  Kun Yuan

  TI Thinks Resolved

  Part Number: UCC3818 Other Parts Discussed in Thread: UCD3138 Hi, As title. What's the internal PWM module gain of UCC3818 BRs, Kun

  • over 3 years ago
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• UCC2818: replace UCC3818 with UCC2818

  

  HS WG-FAE

  TI Thinks Resolved

  Part Number: UCC2818 Other Parts Discussed in Thread: UCC3818 Hello, customer used the UCC3818 for their PFC. For the new design they needed the full industrial temp range up to 85°C and so they used the UCC2818 on the same PCB. But the PFC regulation…

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

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