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

shilon

Nov 7, 2014
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Nov 7, 2014
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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..

6_online.jpg



3_online.jpg


5_online.jpg


4_online.jpg

7_online.jpg



so any one please help me..
its really urgent...
 
Last edited:

Gryd3

Jun 25, 2014
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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.
 

KrisBlueNZ

Sadly passed away in 2015
Nov 28, 2011
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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.
 

shilon

Nov 7, 2014
9
Joined
Nov 7, 2014
Messages
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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)
 

shilon

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

KrisBlueNZ

Sadly passed away in 2015
Nov 28, 2011
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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?
 

shilon

Nov 7, 2014
9
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Nov 7, 2014
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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....
 

KrisBlueNZ

Sadly passed away in 2015
Nov 28, 2011
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How about using a switch so you can switch the battery pack between 3.7V and 7.4V?

Otherwise, keep looking!
 
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