Question about driver amps and tailcap amps

flashlightGiggles

Newly Enlightened
Joined
Dec 29, 2014
Messages
10
Location
Aiea, HI
I recently picked up a couple of solarforce flashlights and wanted to try making my own dropins.

I've read that some dropins send high amperage through the tailcap switch and a standard solarforce tailswitch is only rated for about 3 amps.

Depending on the number of 7135 chips that are attached to the driver, it's not very hard for a driver to send 6 amps to the LED. Maybe even higher for some of the dropins in the CPF Marketplace.

My question:
Is there any relationship between the amps at the tailcap and amps to the LED?
 

DIWdiver

Flashlight Enthusiast
Joined
Jan 27, 2010
Messages
2,689
Location
Connecticut, USA
In a 7135 based driver (or any linear driver) the LED current and the tailcap current are the same.

With a buck type switching driver tailcap current is less. With a boost driver tailcap current is higher.
 
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