It seems odd but I am getting around 5.5v out of the 12V boost converter.
Could this be that it is the wrong way round, the chip is blown, or something else is. I am reluctant to swap it around anyway because I only have 1 (They are £4 each); I can't see any markings of direction on the chip; had to go by the picture and the text on the top.
I could order another as I need some more of the 3.3v (on my last 1) but wanted to wait until I'd mainly finished incase I needed other components (£12 delivery!!).
Is the chip meant to be receiving the ~4V in from the battery board or the 3.3 V line; the schematic is unclear.
Thanks.
5.5V on 12V line?
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Please be positive and constructive with your questions and comments.
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Re: 5.5V on 12V line?
Hmm Also my 28v supply chip started smoking
There must be something causing the short and possibly grounding the sense causing the 12v chip to go to 5v mode.
I guess it's search the board time...
There must be something causing the short and possibly grounding the sense causing the 12v chip to go to 5v mode.
I guess it's search the board time...
Last edited by Wrhector on Thu Jun 25, 2009 5:59 pm, edited 1 time in total.
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Re: 5.5V on 12V line?
Ok fixed it.
Basically the 12v and 24v rail inductors where shorted. Least the chips survived ^^
Basically the 12v and 24v rail inductors where shorted. Least the chips survived ^^
Please be positive and constructive with your questions and comments.