Answered

• LM3478Q-Q1: FA/SD floating issue

  

  Dave Chang

  Resolved

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3478 Hello support team, Thanks for the help! Our customer has a problem about the FA/SD pin setting. As I know, if the FA/SD connects the resistor to ground, the function is set to the…

  • Resolved

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

• LM3478Q-Q1: frequency setting

  

  Josef Warta

  TI Thinks Resolved

  Part Number: LM3478Q-Q1 Hello Team, our customer is using LM 3478 IC in flyback circuit. The calculated resistance for setting frequency does not match with what he measured on the board. The formula is as following; For example, considering…

  • over 4 years ago
  • Power management
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• LM3478Q-Q1: boost to 200v reference design

  

  Liven Deng

  TI Thinks Resolved

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3478 , LM3481 Hi Could you kindly help to support LM3478Q-Q1 boost to 200v reference design, thanks a lot.

  • over 6 years ago
  • Power management
  • Power management forum
Answered

• LM3478Q-Q1: Maximum VOUT

  

  user4806129

  Resolved

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3478 I don't understand why boost controllers (with an external FET) have a maximum output voltage rating. Why is the output voltage rating not dependant on the FETs (V ds ).

  • Resolved

  • over 7 years ago
  • Power management
  • Power management forum
Answered

• LM3478Q-Q1: unstable output @high temp

  

  Dongbao Zhou

  Resolved

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3478 Hello team, One of my customer use LM3478 to generate +-40V from 12V battery, the output voltage of P_40V_NEG_ISO became unstable ( fluctuate between -37.5V and -39.8V, no rule) and P_40V_POS_ISO…

  • Resolved

  • over 7 years ago
  • Power management
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• LM3478Q-Q1: Automobile grade circuit devices heat up to 100 degrees Celsius, help find out why

  

  zhang ping

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3478 MOSFET is PD70N1053,Vin 6~16V，Vout 12V or 15V ，Iout=1A。All the devices on the circuit have a serious fever, up to 150 degrees Celsius, and the devices with heat sinks up to 100 degrees…

  • over 6 years ago
  • Power management
  • Power management forum

• LM3478Q-Q1: Datasheet not found

  

  AIT GHRIB Abderrahman

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3481-Q1 Hi TI team, Please privide datasheet for LM3478Q-Q1. Many thanks in advance. Regards, Abderrahman

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

• TINA/Spice/LM3478Q-Q1: LM3478

  

  MAtteo Zoldan

  Resolved

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: TINA-TI , LM3478 Tool/software: TINA-TI or Spice Models Hi, I tried to import a LM3478 PSpice model but during the process to create the macro, it aborts and the follow message appears: …

  • Resolved

  • over 8 years ago
  • Simulation, hardware & system design tools
  • Simulation, hardware & system design tools forum

• LM3478Q-Q1: The output voltage does not accord with the designed value and the Vfb is lager than mannual datasheet

  

  Kun Yuan

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3478 Hi E2E! I have met a problem with LM3478.The output of circuit was beyond the design value(14.359V~15.671V) with the LM3478QMM/NOPB, which is used in 6~18V SEPIC to 15V. In the producet lind…

  • over 7 years ago
  • Power management
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• Variable frequency design and soft start condition

  

  Ni Zhang

  Part Number: LM3478Q-Q1 Other Parts Discussed in Thread: LM3478 Tool/software: when power supply increased from 0V to 5V and MOSFET controlled as open，we found the frequency in DR pin is change，but finally DR pin will driver to high for a long time…

  • 5 months ago
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  • Power management forum

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