• LM5158: LM5158 PSR support

  

  Eddie Chou

  TI Thinks Resolved

  Part Number: LM5158 Other Parts Discussed in Thread: LM5185 Tool/software: Hi Team, May I check if LM5158 can support PSR voltage feedback like LM5185? customer want reduce one aux channel. Thanks & Regards Eddie

  • 26 days ago
  • Power management
  • Power management forum

• LM5158: About LM5158 SW pin voltage rising/falling time control in the SEPIC configurtion

  

  Alex Khramov23

  TI Thinks Resolved

  Part Number: LM5158 Tool/software: Is there the way to control LM5158 SW pin voltage rising/falling time in the SEPIC configuration? I measured the LM5158 SEPIC output voltage ( 20V ) directly at the output ceramic capacitors with extremely short ground…

  • 1 month ago
  • Power management
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• LM5158: Minimum feedback current requirement

  

  KrnB

  TI Thinks Resolved

  Part Number: LM5158 Tool/software: Hello, Please can you confirm minimum feedback current requirement for LM5158. My intention is to know the maximum permissible resistor values for the feedback network.

  • 4 days ago
  • Power management
  • Power management forum
Answered

• LM5158: LM5158 PWM cycle time

  

  Katsuya Kurisu

  Resolved

  Part Number: LM5158 Tool/software: Hi, Staff I'm designing boost convertor. Vsupply range is from 25.5V to 46.0V Vload range is from 47.05V to 49.96V.(Typ. 48.5V) Target Fsw is about 500KHz. In Vsupply is 46.0V and Vload 47.05V, PWM Duty is 3.25…

  • Resolved

  • 2 months ago
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• RE: LM5158-Q1: Boost Converter

  

  Moritz

  Hi Reddy, I would recommend to keep some ceramic caps and dont change all to aluminum. They are needed for the higher frequencies. You can use special types like shown in the appnote: Regarding the input capacitors, please try to increase the total input…

  • 1 month ago
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• LM5158: Bug in WEBENCH?

  

  Axel Huelsmann

  Part Number: LM5158 Tool/software: WEBENCH selects a transformer VP2-0066R from Eaton, but calculates the wrong series resistances. I entered the following data to WEBENCH: VinMin = 16.0V VinMax = 32.0V Vout = 4.0V Iout = 1.5A Device = LM5158RTER Topology…

  • 2 months ago
  • Amplifiers
  • Amplifiers forum

• LM5158-Q1: Default UVLO threshold when external UVLO circuit not given

  

  Abhishek Tiwari

  TI Thinks Resolved

  Part Number: LM5158-Q1 Tool/software: Hi, If I do not use UVLO resistors, at what voltage does the IC starts operation by default? Thanks, Abhishek

  • 1 month ago
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• LM5158: hiccup mode timer

  

  KrnB

  TI Thinks Resolved

  Part Number: LM5158 Tool/software: Hello, I understand that the Hiccup Mode uses timer for fault. Please can you confirm that the Hiccup Mode timer is based on Switching Freq selected in the application.

  • 3 months ago
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• LM5158: 30W Boost (for PoE PSE)

  

  Gilad Dcir

  TI Thinks Resolved

  Part Number: LM5158 Tool/software: I’m working on a boost circuit for PoE type II PSE (30W). The following parameters are required: Vin: 12V-24V Vout: 52V, 0.6A The Webench designed it using a 97µH(21.56mΩ) inductor, which is pretty large.…

  • 2 months ago
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Answered

• LM5158: Output Overvoltage

  

  KrnB

  Resolved

  Part Number: LM5158 Lm5158 datasheet states that it has over-voltage protection when FB pin voltage exceeds Vref by 10%. Please share what is LM5158's behavior if top-side feedback resistor gets open.

  • Resolved

  • 3 months ago
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