How many bcn readers does it take to screw in a light bulb into my LED desk lamp?
Answer: None. This is a nonreplacable-LED desklamp.
So this lamp has one of those aluminum stars and an LED on it. It appears to be some sort of BGA or something with pins underneath. Anyway the PSU is 500mA 3.6V-8V meaning this probably was either meant to massively overdrive 1W LEDs or slightly over drive 3W LEDs...
So it seems that typical 1W LEDs on stars are indeed 3.6V @ 300mA to get 1W which would be overdriven at 500mA, and 3W LEDs appear to be 3.6V@700mA which is a bit under spec, but would be less than 2W with the PSU I have.
The original star that I have is a 7.2V 2S configuration at 500mA which is 3.6W...
Question is where can I get a replacement... with heatsink, do I try to remove+replace the old LED from the heatsink, or do I bother replacing it and trashing the whole lamp? Appears the LED package has a die bond failure as I can press on the package and sometimes can get it to light again.
Answer: None. This is a nonreplacable-LED desklamp.
So this lamp has one of those aluminum stars and an LED on it. It appears to be some sort of BGA or something with pins underneath. Anyway the PSU is 500mA 3.6V-8V meaning this probably was either meant to massively overdrive 1W LEDs or slightly over drive 3W LEDs...
So it seems that typical 1W LEDs on stars are indeed 3.6V @ 300mA to get 1W which would be overdriven at 500mA, and 3W LEDs appear to be 3.6V@700mA which is a bit under spec, but would be less than 2W with the PSU I have.
The original star that I have is a 7.2V 2S configuration at 500mA which is 3.6W...
Question is where can I get a replacement... with heatsink, do I try to remove+replace the old LED from the heatsink, or do I bother replacing it and trashing the whole lamp? Appears the LED package has a die bond failure as I can press on the package and sometimes can get it to light again.
Comment