• UC3845: 1 switch forward troubleshooting

  

  hakbeom kim

  Part Number: UC3845 Hi! I am currently designing a 1-switch forward converter with a 20V/5A (100W) output using the UC3845 controller. I recently measured the MOSFET's drain-source voltage (Vds) under a 20V/2A and 4A (40W and 80W) load condition, but…

  • 3 months ago
  • Power management
  • Power management forum

• UC3845: Designing wide input range flyback issue

  

  Kailun Liu

  Part Number: UC3845 Hi Team, During the startup process of the flyback power supply, an overvoltage occurs at the transformer output. Synchronously collecting the PWM output pin, after the overvoltage occurs, the negative feedback regulation of the…

  • 3 months ago
  • Power management
  • Power management forum

• UC3845: uc3845

  

  Swapnil Kaware

  TI Thinks Resolved

  Part Number: UC3845 Tool/software: Let me know, does TI make UC3845 (Current-Mode PWM Controller) has soft start functionality?

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

• UC3845: Does UC3845 has any AEC-Q qualification or Enhanced product (EP)

  

  Karthik karri

  TI Thinks Resolved

  Part Number: UC3845 Tool/software: Hello Ti Team, Does UC3845 controller has any AEC-Q qualification or Enhanced product (EP) can you please check and let me know Thanks, Karthik

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

• UC3845: UC3845 IC TEMPERATURE

  

  prasanth Chigurupati

  Resolved

  Part Number: UC3845 Hello, I am using UC3845 PWM IC for flyback topology for 24v5 amps Output .Here I noticed while continuous current of 4amps @24V IC getting heat, around 80 degree centigrade. Input Voltage :40VDC Output Voltage 24V @ 5AMPS…

  • Resolved

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

• UC3845: UC3845/ISENSE Overshoot problem

  

  Mandar shitole

  TI Thinks Resolved

  Part Number: UC3845 Hello, We are currently using one of your DC-DC converter ICs (UC3845) for a 5V/21Watt power supply. This power supply is primarily employed in a telecommunication system where noise is a significant issue throughout operation…

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

• UC3845: Need to design 4s to 12s lipo or li-ion Charger

  

  Anmol Jaiswal

  Part Number: UC3845 Other Parts Discussed in Thread: BQ25756 , BQ25756EVM Tool/software: I want to design Charger for 4s to 6s battery. Please help how to proceed starting from AC-DC converter to BMS? Thanks

  • 10 months ago
  • Power management
  • Power management forum
Answered

• UC3845: UC3845 Gate Signal Problem

  

  Behtan Umut Mercan

  Resolved

  Part Number: UC3845 Hello, I have designed a flyback circuit and I have used UC3845 for the following configuration input 12-18 V. Output 48 V 1 A. I attached the Altium schematic pdf file below. However, I could not get any gate signal from to UC3845…

  • Resolved

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

• UC3845: Required Inductor design for DC-DC Buck Converter

  

  Rahul Sharma

  TI Thinks Resolved

  Part Number: UC3845 Tool/software: Dear TI Expert, We are designing dc -dc buck converter using UC3845. Please help to design inductor for the following parameters. 1. Input Voltage Range - 30 to 72 Vdc. 2. NO load Output Voltage - 13.80Vdc…

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

• UC3845: Vref output voltage abnormal

  

  Beida Song

  TI Thinks Resolved

  Part Number: UC3845 Tool/software: Hi expert, Pls see below schematic. After place C30 in VREF pin, Vref output voltage will be probabilistic anomalies. After delete C30, Vref output fault voltage cannot be reproduced. The first waveform is normal…

  • over 1 year ago
  • Simulation, hardware & system design tools
  • Simulation, hardware & system design tools forum

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