LED Drivers/LCD Bias

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LED Drivers/LCD Bias

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Related Posts

  • Forum Post: Re: TLC5951 - Dimming a sign

    Michael Day
    For overall dimming, I suggest using the Global Brightness function. This functionality is designed to dim the overall sign. You can not use the XBLNK pin for this function because XBLNK resets all grayscale counters when low.
    on Jan 14, 2010

  • Forum Post: TLC59108 Sample Software

    Hiroshi Hashimoto41395
    Isn't there basic sample program of some LED illumination patterns of TLC59108?
    on Feb 10, 2010

  • Forum Post: TPS61165 PWM control

    Shannon
    Hi, I'm using a TPS61165 to drive high brightness LEDs, and I'm not sure from the datasheet how the PWM control works. I'm hoping to flash the LEDs at a low frequency (visible to the human eye, so less than 60 Hz), and vary the dimming at the same time to create an interesting display for...
    on Mar 23, 2010

  • Forum Post: TPS61500 problems

    Andreas Pabst
    Dear support team / Dear Community, We have a problem concering the TPS61500. Below you will find a description of our project and our problem. We are working in a project for a diploma thesis. The goal of this project is to build a lamp which is able to emit light in most colors of the...
    on Feb 28, 2011

  • Forum Post: LED driver Opportuninty

    Calum Mackinnon
    I have a customer who has the following LED driver specs VIn = 41V-45V Vout = 38V Iout = 350mA to 1.3A He wants PWM dimming and needs high side current sense. Ideally it would be a sub $1 part Do you have any suggestions? Cheers Calum
    on Mar 28, 2011

  • Forum Post: Application for dimming white LEDs on multiple channels

    Todd Larson
    I have an application for dimming white LEDs on multiple channels. I have tried using the TLC5940 with 16 channels with dot correction and grayscale PWM with some success. Generating the GS clock is messy at best. If a 25MHz internal oscillator was provided for the GS clock, this would be a nearly perfect...
    on Apr 12, 2011

  • Forum Post: TLC 5940: Why LED intensity decrease when generate BLANK signal every 4096 pulses?

    Pedro Ortiz
    Hi, we are using three TLC 5940 connected to one PIC18F4620 that generate the control signals. The problem appears when we activate the BLANK signal every 4096 pulses, the LED intensity result very poor. When we use BLANK signal every 256 pulses, the LED brightness increase well. However...
    on Sep 28, 2011

  • Forum Post: LM3429 Design queries

    alain barillet
    Hello TI Team, For a study I get some sample of the LM3429 . I made with Webench LED designer the components calculation for 3x Nichia NS6W083 with 0,3A current from 6V to 9V Input voltage. a nd soldered the chip on a test board . The circuit works well without PWM Signal ( I measured 303mA) but I...
    on Nov 22, 2011

  • Forum Post: LED driver for variable length automotive general purpose light

    Alex Walters
    Hi, I'm working on a project which requires a high brightness LED driver for a general purpose light which will go into trucks and vans. V IN range would be 8-32V DC, with 13.5 V being typical. It needs PWM dimming control. I would like to run the LEDs at 350mA. typical LED forward voltage would...
    on Dec 19, 2011

  • Forum Post: PWM of TLC5917 via OE?

    Lee Mulvogue
    I would like to use the OE pin of the TLC5917 for PWM control at about 160Hz, but am unsure of the implications/interactions with the Mode Switching method. It will also be connected up for SPI changing of "Normal Mode" settings, but these setting changes would only occur when the PWM system...
    on Feb 9, 2012

  • Forum Post: Re: LM3429 Design queries

    alain barillet
    Hello Lei Han , Thanks for the reply! The new design with the LM3421 is now finished, I get last week all the components, but I have to find a little bit of time to sold it and test it. I think it's the right way to get the best result for my application, but I'm a little bit disapointed that...
    on Mar 30, 2012

  • Forum Post: where to get slvc366.xls?

    gordon sasamori
    The App Note SLVA471 mentions SLVC366 Excel spreadsheet and has a link http://www.ti.com/litv/zip/slvc366 This redirects to http://www.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=slvc366&fileType=zip However, this URL returns nothing. I tried Mozilla FF and IE7/IE8. Is this...
    on Nov 28, 2012

  • Forum Post: 0-10v Analog Interface in TPS92210 for PWM Dimming

    Surekha Burkul
    We have designed the solution for 18 W T8 tube Light in TPS92210, We need the support from Texas Instrument for the further development in LED lighting. We need to design 0-10V analog interface for PWM dimming in TPS92210. Please share the design for PWM dimming, we need to complete this deisgn very...
    on Dec 26, 2012

  • Forum Post: LM3409 analog dimming issue

    Cl Lin
    Hello, On the LM3409 we are driving 4 series LEDs and are having difficulty getting the LEDs to dim far enough down using the IADJ pin (using the analog 0-1.24V control). At 0V, we still have about 13mA @ 10V flowing through the LEDs string and thus the LEDs are still lit. Looking more closely at the...
    on Feb 15, 2013

  • Forum Post: Combined I2C boost converter and dimmer?

    chrylis
    I am experimenting with using the TLC59108 to control lights for a portable device I'm building, but I'm needing to run the LEDs at higher than the supply voltage (LiPo). Currently I'm using a separate boost circuit based on the LMR62421. Is TI considering or developing a combination driver...
    on Feb 23, 2013

  • Forum Post: TLC59108 OUTn tolerance in voltage difference

    chrylis
    The LEDs I'm working with have a combined (datasheet) string Vf error of +-1.2V or more. How wide a disparity in "leftover" VLED between pins can the TLC59108 sink and still maintain current consistency between strings?
    on Feb 23, 2013

  • Forum Post: LM3433 10A to 40A EVB

    yingsong zhang
    I want to drive pt-121 in the dimming way of 32khz. The peak current is 30A. Can I achive that goual with this board? What should I do ? Thanks. By zhang.
    on Mar 18, 2013

  • Forum Post: LM3429 LED driver - analog dimming and LED string length

    Dev Joshi
    Afternoon folks, I'm currently running together an LED driver design based around the LM3429 device. The design, which I pulled from the WebBench generator, is almost complete (see attached PDF for schematic) but there are a few things I wanted to double check: 1) This driver will need to be...
    on Mar 25, 2013

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