Discontinued: LD-M2 - info and FAQ thread (up to 19V 20Amps PWM-less linear driver)

32 posts / 0 new
Last post

Pages

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU
Discontinued: LD-M2 - info and FAQ thread (up to 19V 20Amps PWM-less linear driver)

 Product is no longer produced.

Sales thread:

http://budgetlightforum.com/node/39824

Useful links:

http://budgetlightforum.com/node/39673

LD-M2 is a high power version of LD-2 developed because of continuous demand for higher power drivers which could reliably drive new big emitters like MT-G2,XHP50,XHP70,and multiple XM-L2s,nichia 219C etc.

Idea was old as LD-1,and it's simple:put main source of heat-mosfet on separate board which could then dissipate that heat more easily.Last testing with mosfet on led mcpcb showed good results,much better than older idea of FR-4 with vias : http://budgetlightforum.com/node/39673?page=4#comment-809544

Disadvantage of that method is two separate boards,so stacking two boards was pretty logical solution.

LD-M2 has two boards,the bottom one is 1mm aluminum metal core pcb,70um copper,with MOSFET,NTC sensor,moonlight resistor and multicell support parts on it;the top one is basically LD-2 pcb without parts that are on bottom pcb.

Result is driver with identical features/specifications like LD-2 except that voltage,current and power dissipation ratings are higher.

Because of that,I will mention only differences compared to LD-2 specifications (you can find LD-2 full specification in LD-2 info thread):

 

  • Input voltage: 2.8 - 19V (user must solder jumpers for proper operation,depending on number of cells in series)
  • Output current on high: 6A or 12A, 4A - 20Amps possible by changing 0603 resistor
  • Max. power dissipation: 15Watts@25C case temperature, 12Watts@60C case temperature
  • NTC over temp. sensor,1S-4S cell support parts and moonlight parts are already soldered on MCPCB by default - no need for adding/changing any parts for 1S-4S cell operation,only jumpers soldering/desoldering
  • less than 150uA of parasitic current in sleep mode for all 1S-4S settings (slightly lower than LD-2 with multicell parts)
  • Only two thick and one thin wire is needed for complete connection (optional,two additional thin wires for e-switch)
  • Two big solder pads on MCPCB for up to 16AWG wire support
  • 1mm bottom alu metal core PCB with 70um copper - bottom is electrically isolated so it can be mounted directly on flashlight metal surface
  • 25mm diameter,~5.5mm height

 

Moonlight resistor note:

Moonlight current set: Rmoon=(Vbatt - Vled)/Imoon

For 2S,3S and 4S configurations moonlight current will be 2,3 or 4 times higher if stock 154Ohm resistor is used! Upper equation is still valid,but because (Vbatt - Vled) is 2,3 or 4 times higher,current is also higher for the same factor.To keep moonlight current at ~10mA in case of 2S,3S and 4S configurations,moonlight resistor should have next values:

1S - R~150 Ohm

2S - R~300 Ohm

3S - R~450Ohm

4S - R~600Ohm

As it can be seen from equation,current depends on battery voltage,so it will drop as battery voltage drops.Typical Vled values for high power white LEDs at very low currents are 2.6-2.7V.

 

Setting operating voltage: 1S-4S solder jumpers

Driver supports 1 to 4 Li-ion cells in series,and to ensure proper operation,some solder jumpers must be shorted,deepening on cell number:

1xcell  (1S) - jumper 1S soldered,others unsoldered

2xcells(2S) - jumper 2S soldered,others unsoldered

3xcells(3S) - jumper 2S and 3S soldered,others unsoldered

4xcells(4S) - jumper 2S, 3S and 4S soldered,others unsoldered

Note: driver comes with all solder jumpers unsoldered,so user must solder jumpers depending on his application.

Warning!

Driver configured for "N" cell operation should not be used with "N+1" cells!

Driver cannot protect itself from too high voltage,so it will burn if it’s connected to higher number of cells in series in that case.

 

Connection diagram:

Diagram made by BLF member Andi,thanks!

Example:

 

Applications:

  • driving single or multiple emitters  - XM-L2,XP-l,XP-G2,Nichia 219C,MT-G2,XHP50,XHP70,big color leds like SST-90,etc. in bigger flashlights (well in every flashlight with place for 25mm driver:)

 

 

 

 

 

Edited by: led4power on 11/04/2016 - 03:45
led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU

Reserved.

Sirius9
Sirius9's picture
Offline
Last seen: 1 week 7 hours ago
Joined: 03/04/2012 - 19:23
Posts: 4672
Location: South Europe

As a first subscriber I hope I can get a sample for (well, I don’t have proper testing equipment so I will say) for my own pleasure Big Smile

 

M4D M4X
M4D M4X's picture
Offline
Last seen: 1 year 5 months ago
Joined: 03/19/2014 - 05:17
Posts: 8821
Location: Austria (GMT + 1)

great evolution of the LD-2!

PLEASE NOTE
i do not work in "reviews, deals and codes" for the time being
maybe M4D M4X will return one day, but until then:

THANK YOU FOR YEARS OF YOUR SUPPORT AND FRIENDLY CONTACTS!

KawiBoy1428
KawiBoy1428's picture
Offline
Last seen: 13 hours 16 min ago
Joined: 04/11/2014 - 18:05
Posts: 4275
Location: The Motor City

Sweet! Wink

KB1428 “Live Life WOT

T-boon
Offline
Last seen: 1 year 1 month ago
Joined: 02/22/2015 - 00:20
Posts: 192
Location: israel

Subscribed

tru3s1lv3r
tru3s1lv3r's picture
Offline
Last seen: 3 months 1 week ago
Joined: 07/15/2015 - 23:34
Posts: 676
Location: South of the ATL

Aspiring Fhashlightaholic!

mattlward
mattlward's picture
Offline
Last seen: 3 weeks 2 days ago
Joined: 06/19/2015 - 09:20
Posts: 3453
Location: Illinois, USA

I would love to see it in 22mm, but 25 is useful as well. Now to just get ahold of one!

EDC rotation:
KR4, SST-20 FA3 4000k (favorite!)
FW3A, Nichia 4000k sw40 r9080 (second favorite)
FW1A, LH351D 3500k (third favorite)
FW1A, XP-L Hi 3A
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
Emisar D4V2, brass E21A 3500k (night light of choice)

Cula
Cula's picture
Offline
Last seen: 32 min 39 sec ago
Joined: 11/14/2014 - 02:04
Posts: 382
Location: Croatia

Looks great, it is a beast. Great work Neven, as always. Count me in for one or two at least.

koyotee
koyotee's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: 11/22/2012 - 11:12
Posts: 1688
Location: Slovenia

Put me up for one please!

Finaly, proud owner of a Powerex Maha mh c-9000 for my Eneloops:)

mrradlos
Offline
Last seen: 5 years 2 months ago
Joined: 06/22/2011 - 09:22
Posts: 11

Is it possible to solder the wire to the LED Anode (+) to the “big hole at 4 o’clock” in the your connection diagram – like with your LD-2 driver?

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU

mrradlos wrote:
Is it possible to solder the wire to the LED Anode (+) to the "big hole at 4 o'clock" in the your connection diagram - like with your LD-2 driver?

No, LED anode should be connected directly to contact PCB/spring/Batt+(it would make no sense connecting thick wire to driver and from driver to LED+ with this type of driver,this is just easier).

djozz
djozz's picture
Offline
Last seen: 6 days 13 hours ago
Joined: 09/07/2012 - 17:04
Posts: 18319
Location: Amsterdam

Nice new developement, I'm not a big flashlight addict, so it is not for me, but I'm sure many others will love this one! Smile

emarkd
emarkd's picture
Offline
Last seen: 7 months 2 weeks ago
Joined: 04/14/2015 - 22:04
Posts: 1608
Location: Georgia, USA

So now that this driver is available for purchase, what are some good host options for this beast? I don’t think I own anything large enough to hold it…yet.

Ouchyfoot
Ouchyfoot's picture
Offline
Last seen: 1 year 11 months ago
Joined: 09/01/2012 - 06:15
Posts: 5089
Location: Canada

Yes, yes, yes.
This driver is getting my modding juices flowing. I want. I’ll figure out what I’ll do with it later.

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU

One example is SD75:http://www.taschenlampen-forum.de/modding/43906-modding-lumintop-sd75-2.html#post616271

I'll mod SRK soon(3x6A).

Few other lights that come to my mind are Courui D01,TK75,BTU shocker,trustfires TR-J19,J20,Maglites?

finges
Offline
Last seen: 21 hours 26 min ago
Joined: 11/19/2014 - 14:50
Posts: 505
Location: Germany
emarkd wrote:
So now that this driver is available for purchase, what are some good host options for this beast? I don’t think I own anything large enough to hold it…yet.

Is it? What is the price?

M4D M4X
M4D M4X's picture
Offline
Last seen: 1 year 5 months ago
Joined: 03/19/2014 - 05:17
Posts: 8821
Location: Austria (GMT + 1)

19.99 USD shipped?

PLEASE NOTE
i do not work in "reviews, deals and codes" for the time being
maybe M4D M4X will return one day, but until then:

THANK YOU FOR YEARS OF YOUR SUPPORT AND FRIENDLY CONTACTS!

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU
DOHC20
Offline
Last seen: 3 months 4 weeks ago
Joined: 05/05/2014 - 03:15
Posts: 90
Location: Melbourne Australia

hey does this driver have LVP for whatever cell configuration that is chosen? just wondering..

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU

Yes,based on solder jumpers setting driver knows number of cells.

Andi
Andi's picture
Offline
Last seen: 1 year 11 months ago
Joined: 01/22/2011 - 08:08
Posts: 333
Location: Germany

I have made a wiring diagram with Contactplate for Batteries:

maybe it helps someone.

 

DavidEF
DavidEF's picture
Offline
Last seen: 1 year 3 weeks ago
Joined: 06/05/2014 - 06:00
Posts: 7699
Location: Salisbury, North Carolina, USA

Thanks Andi!

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

Xandre
Xandre's picture
Online
Last seen: 11 min 20 sec ago
Joined: 03/06/2011 - 07:02
Posts: 579
Location: South Germany

Super

Regards Xandre

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU

Looking great,thanks Andi,
I’ll add your picture to OP.

Andi
Andi's picture
Offline
Last seen: 1 year 11 months ago
Joined: 01/22/2011 - 08:08
Posts: 333
Location: Germany

Question, is this possible?….

…one cable for the E-Switch over “Ground”.

 

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU

It should work fine.

Andi
Andi's picture
Offline
Last seen: 1 year 11 months ago
Joined: 01/22/2011 - 08:08
Posts: 333
Location: Germany

Great, thanks! Wink

 

Mieciu
Offline
Last seen: 10 months 1 week ago
Joined: 02/07/2015 - 14:26
Posts: 40
Location: Poland

2 questions:
- will it work with piezo switch? (short pulses)
- possible to change modes to have something like this: 100% -> 30% -> OFF ?

led4power
led4power's picture
Offline
Last seen: 1 day 14 hours ago
Joined: 12/29/2012 - 09:48
Posts: 1348
Location: Croatia,EU

I’m not sure about piezo switch,since you can’t do normal/long presses.
Anyway,I will no longer produce LD-M2 (working on LD-M3,ETA is ~2 months).

Mieciu
Offline
Last seen: 10 months 1 week ago
Joined: 02/07/2015 - 14:26
Posts: 40
Location: Poland

ok, thanks Smile

Pages