Author Topic: Review. Fasttech 1v to 3.6v single mode driver.  (Read 2658 times)

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Offline MRsDNF

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Review. Fasttech 1v to 3.6v single mode driver.
« on: August 07, 2013, 10:22:40 PM »

Mode

LED Current  Amps

LED Voltage

Tailcap Current Amps

Sanyo 18650 at 4.2 volts

High

1.75

3.1

1.9

Ultracell LiFEPo4 at 3.6 volts

High

.7

2.9

.8

Eneloop LSD AA at 1.4 volts

High

.37

2.79

19.

 

This driver was purchased from Fasttech. Link below.

https://www.fasttech.com/products/1127402

 

Specifications from Fasttech website.

PERIPHERAL TYPE             Flashlight Driver

Electronic Components

CONSTANT CURRENT     Yes

DRIVER TYPE      Boost driver and Linear regulator

INPUT VOLTAGE               0.9~3.6 -volt

OUTPUT CURRENT          800 mA

PCB HEIGHT (W/O COMPONENTS)           1.5 mm

REVERSE POLARITY PROTECTION              No

Flashlights

FLASHLIGHT MODES      

MODE COUNT   1

MODE MEMORY              

Package

PACKAGE TYPE  OEM

Dimensions us | metric

DEPTH   2 mm

HEIGHT 17 mm

WIDTH  17 mm

DIAMETER           17 mm

PRODUCT WEIGHT          1.1 g

Product Numbers

FASTTECH SKU  1127402

Details:

Booster driver mode when input voltage is 1.5V or less

Linear regular (constant current) mode when voltage is between 1.8V and 3.6V

Rated at 500mA current output @ 1.5V input

Rated at 800mA current output @ 3.6V input

Lead wires pre-soldered

 

I had a tip of from marcl about this driver being used above its advertised voltage. This is a quick test to confirm whether or not this driver would survive or even run with the voltage above spec. To my surprise the driver did run and after a 5 minute workout the light was still shining brightly and there was not a hint off smoke coming from the driver though it was hot. The above results were taken after thirty seconds off operation. I do not recommend using this driver with any voltage higher than spec, but I may.Wink

 

The usual XM-L LED was used for the testing.

Other drivers tested for comparison are,

http://budgetlightforum.com/node/13488#node-13488

http://budgetlightforum.com/node/15649#node-15649

http://budgetlightforum.com/node/15739#node-15739

http://budgetlightforum.com/node/21622

 

Some comparison night shots.

Firstly the AA Eneloop at .37 amps to the led.

AA LlFePO4 at 07 amps to the led.

18650 LiIon at 1.75 amps to the led.

This driver was set up in a $4.00 501B P60 host. The XP-G2 led was dedomed. It was originally a cool white tint. When dedomed the tint changed to a slightly warm color on the Eneloop and more off a neutral tint with the higher current fed from the 18650.

The last couple off shots were of the battery adaptor made for the AA size lights. It is some sort of black teflon with a 1/4 round copper pin peened over on both ends for battery contact. It was intentionally made short incase any batteries got stuck inside.

When the big picture is to big, look for a point you can start at and build from there.