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current regulated led driver

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current regulated led driver Customers Reviews

  • PowTech PT4115 based LED driver module

    posted by MrDotSneezy

    The module is based on the PowTech PT4115 step-down LED driver, with 5000:1 Dimming via PWM if needed.
    Input voltage is really 8-30V.
    Current is set by the only resistor on the module. I put in a 1ohm, which gives 100mA instead of 650mA. So it can drive 1W or 1/2W LEDs too....
    Up to 1.2A current drive is possible.
    Datasheet for the driver chip can be found on Google.
    R= 0.1/I
    1ohm resistor gives 0.1A
    0.33ohm resistor gives 0.3A
    0.1ohm resistor gives 1.0A
    I'm using the module with the side emitter LEDs found here for model plane Nav lights. Under drive the LED so it doesn't need a heatsink.
    Very versatile small LED driver for up to 30V input.
  • very good reliable driver

    posted by armitatz

    - easy to use- easy to solder- delivers 1.4A to led- 1 mode perfect for simple designs and retrofitting in old lights.
    easy to solder. small diameter fits in many old lights. perfect for updating old lights. straightforward use. no problems with soldering. I used it for an xml led and it delivers 1.4Amps to the led. The use was with no problems and the driver works without geting too hot.
    nice driver. veru useful. easy to use. I expect a 1-mode 2.0A version...
  • Nice AC-DC PS

    posted by id507

    This AC-DC converter is quiet small and in accordance to it component do it's job.the current is a bit low, measured with serial 3*13664:current:290-300mA with output 3.2V.I expected it to heat, according to about 68% efficiency @ 2.7W, it has 0.8W heat, yet the AC-DC didn't more then 50degC. The PCB is not clean, and the input and output wires too short. I needed to replace those wires to longer wires.
    Do it job, thus i would accept a higher output current.
  • DIY your own led bulb :)

    posted by Dominik

    Small enough to put it in E27 DIY LED Light Bulb Casing with Focusing Optic (sku.13741). Remember to secure the bottom of the pcb board against short-circuit with the case - there are many soldering points and on the case you have more than 220V.
    If you want to make you own led bulb for small light spot it may be the right choice for you, but for bigger illumination I strongly suggest 3x1W version.
  • Best Driver I've found

    posted by bls123

    Small, lightweight and easy to modify for just about any use. Has very good current regulation that only varies 5-10ma at most over the total operating range. The units single resistor that sets the current level is easy to change. Input has a bridge rectifier so polarity independent and can be fed from either an AC or DC power source. Bridge rectifier diodes are easy to remove for greater efficiency when powering from a DC source. Uses a PT4115 chip. This makes the max input voltage 40VDC (or about 28V AC) so up to 10-11 LEDs in series can be powered (depending on which LEDs are used and the total LED voltage required of course). Input capacitor is only rated for 25V however so must be replaced for higher voltages.
    Less expensive and a lot easier than building a current regulator from scratch. Exactly the same as 13553 and 13557 except for it's one resistor that sets the current level.
    I buy a number of which ever (13553, 13555 or 13557) is least expensive at the time for projects and simply replace the resistor when a different current level is needed.

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