LED Drivers/LCD Bias

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LED Drivers/LCD Bias

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  • Wiki Page: TLC5947; Riref; output current setting

    Michael Day
    Q: TLC5947; Riref; output current setting by 1004451 I have a question about part TLC5947. I’m wondering about the functionality of the current setting resistor on the device. Does it set the total current through all channels or through any one channel. A: Re: FW: Customer...
    on Aug 30, 2010

  • Forum Post: Re: TLC5925 control the Output-Current

    Brigitte
    Hello Jens, The external resistor is connected to a voltage source of 1.21V and the current through the resistor then defines the target output current. The target output current is 18 times bigger than the current through the external resistor. So to set the output current, you need a certain...
    on Feb 8, 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: LED Backlight Driver for LCD-TFT Display Panel

    Dinu Paulson
    Hi, I need support for a 5.7" LCD backlight.I need two requirements to satisfy.I have to use two Displays and they have different LED backlight config 1. One is with 3 strings each of 60mA/13.3V 2. The other one with single string 200mA/10V I need to operate two LCD's from one IC...
    on Sep 6, 2011

  • Forum Post: 1.2A Led driver from a 3.2V LiFePO4 battery

    Kris Demets83365
    Hi, We need to design a led driver with preferably following specs: - input voltage range: 2.4...4.5V form a single cell LiFePO4 battery ( - Continuous Led current <= 1.2A - Dimmable (0..100%) - 1 to 3 leds (3W) in series What device would you suggest ? Can the TPS6105x be used...
    on Sep 6, 2011

  • Forum Post: LM3405 intensity issue

    Aditya Ayachit
    Trying to use LM3405 for driving 1 Watt LED. Problem is as follows: The LED intensity is insufficient. The setup is as follows: 1. Circuit as per shown in the simplified block diagram. 2. EN/DIM pin is connected to the supply directly. 3. The power supply is a lithium ion battery (6000...
    on Mar 7, 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

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