Jetbeam        
Results 1 to 14 of 14

Thread: Tech help - identifying a charging chip?

  1. #1

    Default Tech help - identifying a charging chip?

    Hello

    I wonder if anyone can help?
    I have a cheapy Aldi or LIDL work light that has stopped working. I'm pretty handy with a soldering iron and I'd like to have a stab at fixing it.

    I'm presuming it got plugged into the wrong power supply an it popped the charging chip.










    I've had a search for the number on charging board but can't find anything.
    There's not a lot left of the chip to get any numbers from.

    I wonder if anyone has similar and can check the numbers, or knows any more detail that would help me track down a new chip?

    Cheers!

  2. #2
    Moderator
    archimedes's Avatar
    Join Date
    Mar 2011
    Location
    CONUS, top left
    Posts
    10,847

    Default Re: Tech help - identifying a charging chip?

    ... thread moved to Flashlight Electronics ...
    ... is the archimedes peak

  3. #3

    Default Re: Tech help - identifying a charging chip?

    Quote Originally Posted by archimedes View Post
    ... thread moved to Flashlight Electronics ...
    Thank you!

  4. #4
    Flashaholic*
    Join Date
    Dec 2006
    Location
    Tokyo, Japan
    Posts
    1,132

    Default Re: Tech help - identifying a charging chip?

    Can you please confirm what type of battery is used in the light, and how many cells, and if in series or parallel?

    (I'm suspecting 1 li-ion cell so far)

  5. #5

    Default Re: Tech help - identifying a charging chip?

    Quote Originally Posted by zipplet View Post
    Can you please confirm what type of battery is used in the light, and how many cells, and if in series or parallel?

    (I'm suspecting 1 li-ion cell so far)
    Correct.
    Blue shrink wrapped plastic
    JETPOWER BATTERY
    Li-ion 1000mAh 3.7V 3.7Wh
    WLC-18650-1000 (1IXR 19/66)

  6. #6
    Flashaholic*
    Join Date
    Dec 2006
    Location
    Tokyo, Japan
    Posts
    1,132

    Default Re: Tech help - identifying a charging chip?

    This looks like one of those common 6 pin sot-23 style li-ion charger ICs.
    It's impossible to identify which IC as it is burnt up - but if you look around at a few of them on the market and trace the connections comparing to the datasheet, you should be able to find a compatible part. Replacing that part should fix it.
    Are there any other burnt parts?

  7. #7

    Default Re: Tech help - identifying a charging chip?

    Quote Originally Posted by zipplet View Post
    Are there any other burnt parts?
    There don't appear to be, the charging LED still lights up

    I've found this one on ebay - suitable?

    https://www.ebay.com.au/itm/392056562492




    Thanks for your help.

  8. #8
    Flashaholic*
    Join Date
    Dec 2006
    Location
    Tokyo, Japan
    Posts
    1,132

    Default Re: Tech help - identifying a charging chip?

    Please can you provide a high resolution, in focus picture of both sides of the PCB with good lighting?
    We can help you to trace out the board and find a chip that will be compatible.

    The one you have found might not have the correct pin-out for your board - it also has very low charging current so charge time will be long (about 1000mAh / 180ma = 5.5 to 6 hours)
    If we cannot find a chip with the correct pinout, we can rewire the board to work with a different (but similar) IC.

  9. #9

  10. #10

    Default Re: Tech help - identifying a charging chip?

    The pins layout is the same as TP4057 which is a 500mA max. charger IC.

  11. #11

    Default Re: Tech help - identifying a charging chip?

    Quote Originally Posted by Microa View Post
    The pins layout is the same as TP4057 which is a 500mA max. charger IC.
    Something like this then - https://www.ebay.com.au/itm/302732477953 ?

  12. #12

    Default Re: Tech help - identifying a charging chip?

    Yes, the link is for TP4057. The resister R2 is employed to set the charging current. Adjust the charging current according to the specifications of the battery.

  13. #13
    Flashaholic*
    Join Date
    Dec 2006
    Location
    Tokyo, Japan
    Posts
    1,132

    Default Re: Tech help - identifying a charging chip?

    The rest of the board looks fine, so replacing that part should restore full functionality.

  14. #14

    Default Re: Tech help - identifying a charging chip?

    Thank you everyone, there are 5 on their way to me via a slow boat from China. So a couple of spares to practice on

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •