pwm for an led driver

Discussion in 'The Projects Forum' started by j taylor, Jan 4, 2013.

  1. j taylor

    Thread Starter New Member

    Nov 4, 2012
    19
    0
    Hi to everyone, I have bought some led drivers with a pwm control pin for dimming, i would like to build a pwm for use with these using a ne555 has anyone got a scematic for a pwm which would run these as they should be run i would post the data sheet on the driver but i can not download it so all i can do is give a part number LDU4860S1000-WD i hope this is enough thanks in advance for any help. Ihave just found this can you tell me if this would work and what value resistors i would need [​IMG]
     
    Last edited: Jan 4, 2013
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    There is a short datasheet on the website:
    http://www.xppower.com/pdfs/SF_LDU08-48.pdf

    In there is given the max PWM frequency is 1kHz.

    Code ( (Unknown Language)):
    1.  
    2. Dimming
    3. PWM
    4. Output Current Range • 25% to 100%
    5. Operating Frequency • 1 kHz max
    6. On Time • 200 ns min
    7. Off Time • 200 ns min
    8. Amplitude • 1.25 V max
    9.  
    10. DC Voltage Control
    11. Output Current Range • 25% to 100%
    12. Control Input • 0.3 to 1.25 V max
    13.  
    14. Variable Resistor
    15. Output Current Range • 25% to 100%
    16.  
    17.  
    Bertus
     
    Last edited: Jan 4, 2013
    j taylor likes this.
  3. j taylor

    Thread Starter New Member

    Nov 4, 2012
    19
    0
    Hi and thanks for taking the time to respond to my question i am very new to elctronics and dont know how implement the data
     
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