LED chips and smoking

[nutsnvolts]

Hi all, i'm new to electronics and have recently been asked to replace an LED chip in a light, i have soldered the connections and the lamp works but after about 20 seconds there is smoke and the connections break, can anyone give me ant advice?

i've tried using a higher temperature solder but that hasn't seemed to work.

 

[Audioguru]

Maybe a fault in the circuit current-limiting burnt the original LED but the fault is still there and caused the replacement LED to also burn.

 

[Martaine2005]

Yes, definitely drawing a lot of current to melt the solder.
What chip and what light are you referring to?
Does it perhaps need heat sinking?

Martin

 

[nutsnvolts]

its strange, the LED chip is the same one that the unit uses along with the same control gear, but i still get the smoking off the connections when i put power through it.

some of the reading ive done says to use a thermal paste, would tis make a difference?

 

[Martaine2005]

some of the reading ive done says to use a thermal paste, would tis make a difference?

If it says to use it, use it. It will make a big difference on heat transfer.
But that would kill the chip not melt solder.
You didn't say what chip or light .

Martin

 

[Alec_t]

the LED chip is the same one that the unit uses

What rating? Not a fake?