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dc dc step down Customers Reviews

  • Great Stepdown transformer with USB

    posted by Naynee

    Good quality made.Compact and run fine in the conditions as described, if you want to consume more than 3 AMP use a dissipator to low the high temp but if not work fine.Easy of use and install.
    Works great as described, maybe an extra dissipator work better with high AMP needs.
    Perfect for any project for home or work, I use it with 24V Battery Busses and work very well.Go for it!
  • Nice driver for 10W (3x3) LED

    posted by dielomat

    It does what description says...using 12Volt source i measured 0,76A current with a 10W LED (3x3 type ) - thats almost exactly 9W.Driver gets warm, but ist still touchable without burning fingers after 1 hour running.
    i think in warm environment it will be better to use a cooling plate.maybe tearing off the rectifier would give lower temps and higher efficiency
    The driver is usable for 10w LED like SKU: 39957 Ill sure order some more soon.
  • Does the job. Cheap & customizable

    posted by xtreye

    Pretty cheap. Wide voltage range. Useful for constructions when you need to get several voltage levels from battery of other lager level.
    Got 3 of them, tested one for cellphone charging - 1A@5V, from battery set of 18V.
    Nice thing. I will perform the test with other voltages&currents I require in my constructions, and then probably buy more of them. Definetely worth the money spent.
  • Nice stepdown DC converter

    posted by lasermanathome

    A small PC wich has the advantage to set fixed voltages wich become handy in Ohm-resistant situation if you want to get a good controll over the current.The dipswitch works good if you know how to handle it.
    This last point can be solved by giving a firm overvoltage (within the range of the converter)Because the energyconversion is high efficient, these units are much better than the 78XX (or 79XX)wich converts overvoltage only in thermal enery (they become hot )These kind of converters do normaly not use extra cooling (convection is enough) unless the differece beween input and output volage is big and/or the current, drawn from the converter reacht to the maximum, it is no good idea to rely on the thermal/current protection, other parts or instability can be damaged, capacators (elco's) have a much shorter shelflife when they heat up, their value changes above the limits and they can ruin anythingin line of it....
    Not the cheapest and not the smallest DX converter but certainly one of the most reliable....
  • good

    posted by Zanga2

    - It has good stabilization of the output voltage. When i have supplied it with 12V the output stayed constantly at 4.99 - 5.03 volts regardless of the output current which was between 0.5A to a maximum of 2 Amps
    - A small switch would be a good addition to it when using in the car, or at least connecting it to a switched plus is a good idea to prevent it from running idle and flattening the battery.
    Very good DC power supply, with stable voltage. The price could be better though.

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