Answered

• UC3842: Transfer Function Solved

  

  Werner Verschuur

  Resolved

  Part Number: UC3842 Hi I finally managed to allocate much needed time to Transfer Functions and resolve my original post "UC3842 Transfer Function" in February 2020 The short answer to solving the problem using Plant Transfer function to plot…

  • Resolved

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

• UC3842: How to design a startup circuit driven by auxiliary circuit for UC3842?

  

  Xueshen Zhang

  Resolved

  Part Number: UC3842 Dear TI team, Like this circuit, how do we design the startup circuit? like aux cap, vcc cap, startup resistance. Though I have read the datasheet, I am still confused about it.

  • Resolved

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

• WEBENCH® Tools/UC3842: Suggestion for Battery Charger Design

  

  Ajith Prabhakar

  Resolved

  Part Number: UC3842 Other Parts Discussed in Thread: UCC28700 Tool/software: WEBENCH® Design Tools I have done a power supply design in WEBENCH and and i have to design a battery charger with the same specification please provide your suggestion on the…

  • Resolved

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

• RE: WEBENCH® Tools/UC3842: UC3842

  

  Muhammad Shoaib Majeed

  Its Hardware problem , in open loop test circuit UC3842 operates on 16 V to onward and in above circuit UC3842 did not operate on 13 V at this point

  • over 6 years ago
  • Simulation, hardware & system design tools
  • Simulation, hardware & system design tools forum

• UCC28180: Ucc28180 startup issue

  

  Jiahui Gao

  TI Thinks Resolved

  Part Number: UCC28180 Other Parts Discussed in Thread: UC3842 Tool/software: Hi team， I am currently developing a boost PFC+flyback switching power supply. The PFC chip uses UCC28180, and the flyback uses UC3842. 1. The power supply for UCC28180 uses…

  • 8 months ago
  • Power management
  • Power management forum

• UC3842: Input undervoltage and overvoltage protection

  

  Xiaobing (Eric)

  TI Thinks Resolved

  Part Number: UC3842 Other Parts Discussed in Thread: UCC24630 , LM2903 , LM8364 Hi Team, Can I have some classical schematic suggestion for input under/over voltage protection based on UC3842? Tks a lot. BR, Xiaobing (Eric)

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

• UC2842: How to determine the value of the input capacitance of the flyback power supply？

  

  xiao.pan

  TI Thinks Resolved

  Part Number: UC2842 Other Parts Discussed in Thread: UC3842 Tool/software: Dear experts， The flyback power supply input voltage is 24VDC ,Vout=16V and the input capacitor is 9 x 10uF MLCCs in parallel. When the flyback power supply is loaded with…

  • 9 months ago
  • Power management
  • Power management forum
Answered

• UC3842: About the switch frequency

  

  aggil liang

  Resolved

  Part Number: UC3842 Hi We use UC3842D8 to design a 60W/（15V output） power supply. We design the switch frequency is about 100K, but when we test (only 15V output is loaded),the frequency is 20~30Khz, especially 3kHz with no load. Below is the schematic…

  • Resolved

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

• UC1843A: oscillator frequency setting

  

  John Holguin

  Resolved

  Part Number: UC1843A Other Parts Discussed in Thread: UC3842 Tool/software: From UCx84x datasheet (SLUS223G – APRIL 1997 – REVISED JULY 2022) Section 8.3.7 states: “The UC3842/3/4/5 oscillator must be set to a lower frequency than the sync…

  • Resolved

  • 9 months ago
  • Power management
  • Power management forum

• UC3842: Why the curent sampling resistor always burnted out?

  

  user5886917

  TI Thinks Resolved

  Part Number: UC3842 I used UC3842 to design a 30V-60V Boost circuit,but the curent sampling resistor always burnted out.What's the possible reasons?Thank you!

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

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