Can anyone identify this driver component?

LED Flashlights – General Info
1


i39.tinypic.com/2mgmpw6.jpg

Sorry I’m not sure how to use the image function

I’m trying to work out what the value of the component on the top left where I have removed two others the one going to the green wire.

These wires are going to some terrible LEDs that I bought and each colour is the colour of the led (black is common).

This little black thing with three pins I assume is a transistor but I don’t know what value or how to work it out.

Only two on the pins are being used on each And all it says is a6 on it apart from Q1 next to it.

The I input is 12v. Can you please tell me what I need to replace it with and work out what it is?

Thanks
Tom

2

Found this site, still can’t work it out. There are many A6’s

3

Starting to think is a diode now looking at the list

4

One of these
http://alltransistors.com/smd-search.php?search=A6

5


You sure only 2 pins are connected? Picture isn’t that clear but it seems the 3rd pin is connected to a trace that is shared among the 3 of them.

6

Yea I’m pretty sure, it’s a single layer board and the copper only goes to the pin on the bottom right and the one one the left of each chip.

7

Nope sorry I completely retract that, all three are connected, the third goes round the back. cheers

8

Q1 or Q# on the silkscreen is used for transistors. The ic can’t drive enough current to power the leds directly so instead it switches a transistor & that switches the higher current for the led.

9

Ah ok thanks, can you suggest something I should use to replace it? That one I found before?

10

You could try a 2n7002 mosfet available from mouser for pennies each.

Is this driving a string of 5mm rgb leds?

What do the terminals on the right of the pcb do?

11

Those terminals are just for the 12v input, the white wire of for the IR recivier for the remote.

Here is the item
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=281199336985