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"DC 3.7v to 9v 1A" Need Help..

Discussion in 'General Electronics Discussion' started by shilon, Dec 23, 2014.

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  1. shilon

    shilon

    9
    0
    Nov 7, 2014
    I have a power Bank, capacity 20800 (8x18650 2600mah) output : 3.7V (From direct battery connection, without power bank circuit )

    I want run my 10W led.



    and now i want 9v 1A output from 3.7v input
    i already test "DC-DC Adjustable Step-up Power Converter Module XL6009" but i'm not happy with this output amp..

    [​IMG]


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    [​IMG]


    so any one please help me..
    its really urgent...
     
    Last edited: Dec 23, 2014
  2. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    What kind of answer are you expecting? Whats the problem?
    ...by the way, the power supply you are using is only rated to put out 7W... 3.5V @ 2.1A
    This is not enough for your LED and never will be even if you use a different step-up converter.
     
  3. shilon

    shilon

    9
    0
    Nov 7, 2014
    [​IMG]
     
  4. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    What voltage are you getting out of the DC-DC converter?

    Have you tried adjusting the output voltage?

    Post a link to the DC-DC converter you're using. "DC-DC Adjustable Step-up Power Converter Module XL6009" is not enough detail. There are many DC-DC converters that use the XL6009.

    Post a link to your LED.
     
  5. shilon

    shilon

    9
    0
    Nov 7, 2014
    ICStation XL6009 Power Module 4.5V-32V to 5V-52V DC-DC Converter

    Description
    • Module Feature: Non-isolation booster
    • Mode of rectification: non-synchronous rectifier
    • Input voltage: 4.3V-32V
    • Output voltage: 5V-52V
    • Input current: 4A(maximum)
    • Transfer efficiency: 94% (The highest), Normal efficiency: 85%
    • Switching frequency: 400KHz
    • Output ripple: 50mV
    • Load regulation:�0.5%
    • Voltage regulation:�0.5%
    • Operating temperature: -40℃~+85℃
    • Size:6.98mm (L) *3.80mm (W)
     
  6. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
    Do you see a problem here?
     
  7. shilon

    shilon

    9
    0
    Nov 7, 2014
    yes i see, but its working (not as my requirement)..
    have any other way..
     
  8. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    It's working, but it's not working very well. That is what you normally get if you operate a circuit outside its specifications.

    Can you rewire the battery pack to put cells in series so it produces 7.4V?
     
    Arouse1973 likes this.
  9. shilon

    shilon

    9
    0
    Nov 7, 2014
    have a problem to do this.. if i modify battery pack then i can't use it as a power bank to charge my mobile..!! and one more problem, then how to charge it?

    i'm looking for a circuit like this dc to dc step up....
     
  10. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    How about using a switch so you can switch the battery pack between 3.7V and 7.4V?

    Otherwise, keep looking!
     
    Arouse1973 likes this.
  11. shilon

    shilon

    9
    0
    Nov 7, 2014
    that's a good idea..
    thanks sir.,
     
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