• TPS61165: Effect of inductor in series with LEDs

  

  David Dean

  TI Thinks Resolved

  Part Number: TPS61165 For reasons unrelated to the operation of the TPS61165, my system has an inductor in series with a string of 3 LEDs driven by the TPS61165. I have tested the circuit, currently with a 10uH inductor, and to some surprise it seems…

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

• LEDs of TPS61165

  

  Takahiro Nishizawa

  TI Thinks Resolved

  Other Parts Discussed in Thread: TPS61165 , TPS61197 I have questions about TPS61165. Can we use this IC by series 27 LEDs? When we can not use TPS61165 by series 27 LEDs, please tell us another IC. Vin is 12V, topology is boost and PWM dimming…

  • over 9 years ago
  • Power management
  • Power management forum
Answered

• TPS61165: About variation of VFB

  

  Kaji@PAN

  Resolved

  Part Number: TPS61165 Hi, I am considering the TPS61165 device. The purpose of use is for liquid crystal backlight. The specification is below. With current control I assume LED current of 0.2mA minimum. It is necessary to set VFB = 2mV. I want to know…

  • Resolved

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

• TPS61165: How many LED it can drive

  

  S e

  TI Thinks Resolved

  Part Number: TPS61165 Hi, I would to know if i can use the TPS61165 with 7 LED in series 20mA, input voltage 5V output voltage 21V, And if so is 22uH inductor is OK.

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

• TPS61165: Consultation on led chips using in laser tubes

  

  Weihao Li

  Resolved

  Part Number: TPS61165 Other Parts Discussed in Thread: LM3643 , LM3644 I want to power 4 lasers in series using TPS61165. The lasers characteristics is like a LED, but we need continuous current here. For each laser, the maximum current is 170mA, and…

  • Resolved

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

• TPS61165: Possible to measure output current without attaching LCD?

  

  Marthinus Willemse

  TI Thinks Resolved

  Part Number: TPS61165 Hi, We want to use the TPS61165DRVT to drive the backlight of the NHD-7.0-800480EF-ASXN#-T LCD screen. We've set the current sense resistor to 1.1Ohm in order to get ~180mA output current (as per LCD datasheet). We however only…

  • over 8 years ago
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• TPS61165: Calculating output voltage

  

  kevin amadiva

  TI Thinks Resolved

  Part Number: TPS61165 how do i calculate the output voltage? i need a boosted voltage of around 22.4V with 40mA output. i know how to calculate the current but how do i go about calculating the output voltage?

  • over 9 years ago
  • Power management
  • Power management forum
Answered

• TPS61165: the range of duty cycle by using PWM dimming

  

  nick lin

  Resolved

  Part Number: TPS61165 HI, We are using TPS61165 as my panel's LED driver. I saw the maximum duty cycle is written in electrical characteristics table. but i didn't see the minimum duty cycle value. Can anyone advise the minimum value of duty cycle…

  • Resolved

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

• TPS61165: IC running hot

  

  PeterF

  TI Thinks Resolved

  Part Number: TPS61165 Hello! At about 75% current the IC starts to run very hot and the brightness/current is not longer increasing. My layout is not ideal, might that be caused by that or have is miscalculated the current? My power source is a…

  • over 9 years ago
  • Power management
  • Power management forum
Answered

• RE: TPS61165: Emi testing.

  

  Harini Sankabattula

  Resolved

  Hi Adam, EMI testing is normally done at a system level. We don't have any EMI testing done on this unit. Best, -Harini

  • over 9 years ago
  • Power management
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