Hi, I need to replace a 14" tube-light (working on 230v ac / 50 hz) with a LED lamp with 35 w brightness, the new LED tubelight need to go into a control panel. This is my first project with LED's, and I am learning.
My options are:
I have the capacitance based circuit that steps down the ac and drives the 96 nos. of 5 mm round white LED's. The output of the circuit provides 69 v dc @ 72 mA. The LED's are arranged in four rows of 23 LEDs each. Each row is provided with 18 mA current. The entire circuit is assembled on a PCB, and at one end, is being provided with a fan of 40 x 40 x 10 mm (230 v ac / 50 hz) for forced air circulation. What problems should I look out for ?
Other option is to use 1W LED's. I have a few of them and am unable to understand how to fix them onto the heat sink. The LED's are cicular with a dome shape and have terminals on either side (that look like small wings) for surface mount technology (my guess). The reverse of the LED has a metal tab, but my problem is that the tab is at the same plane as of the terminals. I am aware of the need for heatsink, but how do I fix them on the heat sink ?
Comments are welcome and thanks,