Component DK-2 0315

[Richard]

I'v taken apart a cordless drill and the trigger.

I see a small IC, part of the trigger circuit and it's labelled:

DK-2
0315

Can anyone here help me identify this part?

Could there be a character before the D?

I cannot find the part on Google.

Thanks.

 

[Rich Webb]

On Fri, 21 Jan 2011 16:06:43 +0000, Richard <none@ntlworld.com> wrote:

I'v taken apart a cordless drill and the trigger.

I see a small IC, part of the trigger circuit and it's labelled:

DK-2
0315

Can anyone here help me identify this part?

The 0315 is probably the date code (YYWW). For the rest, it would help
if you could identify the package of that small IC.

The canonical on-line listing of surface mount components is over at
http://www.marsport.org.uk/smd/mainframe.htm

--
Rich Webb Norfolk, VA

 

[Richard]

On 21/01/2011 16:25, Rich Webb wrote:

On Fri, 21 Jan 2011 16:06:43 +0000, Richard<none@ntlworld.com> wrote:

I'v taken apart a cordless drill and the trigger.

I see a small IC, part of the trigger circuit and it's labelled:

DK-2
0315

Can anyone here help me identify this part?

The 0315 is probably the date code (YYWW). For the rest, it would help
if you could identify the package of that small IC.

The canonical on-line listing of surface mount components is over at
http://www.marsport.org.uk/smd/mainframe.htm

This is a picture of the trigger circuit board. It's small, about 30mm x
20mm -ish.

http://media.diynot.com/159000_158472_30367_91153630_thumb.jpg


My enquiry on DIYnot:

http://www.diynot.com/forums/viewtopic.php?t=259590

 

[Richard]

On 21/01/2011 21:06, Richard wrote:

On 21/01/2011 16:25, Rich Webb wrote:

This is a picture of the trigger circuit board. It's small, about 30mm x
20mm -ish.

The IC is that small 8 pin IC towards the LH side of the circuit board.

Marked:
DK-2
0315

I wonder if it's a PWM ic.

Mosfet (not on circuit board) is simply marked D4v313. An ST component,
so possibly STD4v313. Cannot locate that either on Google.

 

[Tim Shoppa]

On Jan 21, 4:12 pm, Richard <n...@ntlworld.com> wrote:

On 21/01/2011 21:06, Richard wrote:

On 21/01/2011 16:25, Rich Webb wrote:
This is a picture of the trigger circuit board. It's small, about 30mm x
20mm -ish.

The IC is that small 8 pin IC towards the LH side of the circuit board.

Marked:
DK-2
0315

I wonder if it's a PWM ic.

Mosfet (not on circuit board) is simply marked D4v313. An ST component,
so possibly STD4v313. Cannot locate that either on Google.

Put a scope on the MOSFET gate and you'll see the PWM clear as day. I
doubt there's any current sense or other feedback into the PWM chip
but the best tools would have some flavor of that.

The halfway decent cordless tools implement battery charge smarts too.
It seems obvious to me that this will eventually be integrated into
the tool itself although many current variations put it into the
battery pack (for rapid recharge this makes some sense as you need to
sense the cell temperature) or more traditionally just current-voltage-
limited wall warts.

I don't see any obvious charger functionality on that little PCB.

Tim.

 

[Richard]

On 22/01/2011 13:42, Tim Shoppa wrote:

On Jan 21, 4:12 pm, Richard<n...@ntlworld.com> wrote:
On 21/01/2011 21:06, Richard wrote:

On 21/01/2011 16:25, Rich Webb wrote:
This is a picture of the trigger circuit board. It's small, about 30mm x
20mm -ish.

The IC is that small 8 pin IC towards the LH side of the circuit board.

Marked:
DK-2
0315

I wonder if it's a PWM ic.

Mosfet (not on circuit board) is simply marked D4v313. An ST component,
so possibly STD4v313. Cannot locate that either on Google.

Put a scope on the MOSFET gate and you'll see the PWM clear as day. I
doubt there's any current sense or other feedback into the PWM chip
but the best tools would have some flavor of that.

The halfway decent cordless tools implement battery charge smarts too.
It seems obvious to me that this will eventually be integrated into
the tool itself although many current variations put it into the
battery pack (for rapid recharge this makes some sense as you need to
sense the cell temperature) or more traditionally just current-voltage-
limited wall warts.

I don't see any obvious charger functionality on that little PCB.

Tim.

Hi.

Yes, it's cheaper model "Classicpower CP-18-2" bought here in the UK.
Bought I think 2003.

The 8 pin chip marked DK-2 0315 will I guess be the PWM generator.
MOSFET will be the motor driver.

Not possible to identify the chip. No real problem though.

 

[Franc Zabkar]

On Fri, 21 Jan 2011 21:12:00 +0000, Richard <none@ntlworld.com> put
finger to keyboard and composed:

On 21/01/2011 21:06, Richard wrote:
On 21/01/2011 16:25, Rich Webb wrote:

This is a picture of the trigger circuit board. It's small, about 30mm x
20mm -ish.

The IC is that small 8 pin IC towards the LH side of the circuit board.

Marked:
DK-2
0315

I wonder if it's a PWM ic.

Mosfet (not on circuit board) is simply marked D4v313. An ST component,
so possibly STD4v313. Cannot locate that either on Google.

The "313" marking on the MOSFET may be a YWW date code. This would be
consistent with the marking on the PWM controller. ST markings often
have a code letter before the YWW. IIRC, this letter indicates the
country of manufacture. I'd say the part marking is probably D4 or
D4v, depending on how it is laid out.

I'm wondering whether both part markings are house codes rather than
regular marking codes. Maybe "D" stands for "Drill", and perhaps the
"4" indicates a 4 amp device ???

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.