Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Experiments & Modifications



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 02-03-2010, 10:49 AM #33
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

^ Probably, instability due to bad pcb or resonance ..... i made some trials, with 3410, and i can say you something, but i'm not a 3410 expert, nor an NS engineer , so, take them for that what they can worth.

First, as also IgorT said you, you need at least 10uF electrolitic tantalium, or 22uF standard electrolitic capacitor at the input, better if paralleled with a 220 or 470 nF ceramic capacitor ..... second, draw the pcb carefully, trying to keep all the connections the shortest possibles, especially the ones related to the coil and schottky diode, and the grounds ..... also, be abundant with the ground pads for heat dissipation ..... third, try to not put capacitors from the pin 1 (in your package is the switching pin) and the ground, but only from the positive output and the ground (i mean, from after the switching diode, and the ground pad), and also here, you need probably a good capacitor value ..... i was using 47uf tantalium paralleled with 1uf ceramic, at the output.

Also, don't place capacitors from the pin 3 and ground (practically, in parallel to the current sensing resistor), if you want a fast response current regulation ..... probably, you can place a 100nF capacitor there, but no electrolitics ..... anyway, the tests that i made in the past with this IC, showed me that it's a lot "permalous" about how you draw the PCB tracks ..... some of my prototypes also was not working, with no electrical defects, just cause it was not agreeing how i had placed the components and tracks ..... where instead, redrawing it for keep the coil the nearest possible to the pins 1 and 5, it worked with the same circuit and components ..... there's nothing to do, it's permalous


__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 02-03-2010, 02:31 PM #34
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

I did made my PCB following the datasheet guidelines as close as possible, I will draw you my components layout in paint, wait a second.



1. Coil
2. schottky
3. input cap
4. current regulation resistor
5. output cap, ceramic disk

I know... I know it all don't stone me to death yet. I need much larger capacitance at input and also need cap across the diode also.
I already have a new revised PCB in my mind, which does not require big ceramic disk cap, and also revised coil placement so I can use bigger ones (4x4x2 milimeter that got shipped today from coicraft free samples, yay! ) these new ones are 4.7 uH, but 1.5 A current rating. Hopefully they will suffice.

If you want I can TRY to draw out new PCB layout for ya, but it is kinda difficult on lappy touchpad.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!


Last edited by Eudaimonium; 02-03-2010 at 02:42 PM.
Eudaimonium is offline   Reply With Quote
Old 02-03-2010, 03:16 PM #35
ReNNo's Avatar
Class 2M Laser
 
Join Date: Mar 2009
Location: Kakanj, Bosnia and Herzegovina
Posts: 589
Rep Power: 42
ReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond repute
ReNNo ReNNo is offline
Class 2M Laser
ReNNo's Avatar
 
Join Date: Mar 2009
Location: Kakanj, Bosnia and Herzegovina
Posts: 589
Rep Power: 42
ReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond repute
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Use EAGLE and try to design PCB.
Then you can print lot, lot of these PCBs on one A4 photo paper. (With laser printer)

It's much easier than drawing PCBs with hand and all lines will look much more professional.
__________________
My lasers:
Homemade Red laser @410mA LOC + AixiZ glass lens
Homemade Blue-Ray laser @ 100mA PHR-803T
O-like Green (532nm) 150mW module in UF WF-501B host
808nm 1W Homemade IR portable laser
3 motor spirograph (Homemade)
ReNNo is offline   Reply With Quote
Old 02-03-2010, 03:25 PM #36
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Quote:
Originally Posted by ReNNo View Post
Use EAGLE and try to design PCB.
Then you can print lot, lot of these PCBs on one A4 photo paper. (With laser printer)

It's much easier than drawing PCBs with hand and all lines will look much more professional.
Told ya, I ain't got no laser printers so ...

I am working with what I have, Never failed me !
Let's first get the prototype done. As soon as I have my bluray finished with this driver, and powered with one 18650 lithium ion cell, then we can worry about professional looks.
First I need a proof of concept.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 02-03-2010, 03:33 PM #37
ReNNo's Avatar
Class 2M Laser
 
Join Date: Mar 2009
Location: Kakanj, Bosnia and Herzegovina
Posts: 589
Rep Power: 42
ReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond repute
ReNNo ReNNo is offline
Class 2M Laser
ReNNo's Avatar
 
Join Date: Mar 2009
Location: Kakanj, Bosnia and Herzegovina
Posts: 589
Rep Power: 42
ReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond reputeReNNo has a reputation beyond repute
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Yes, but every copying shop can do this for you for less than $1.

I agree, first you need to finish and test driver and then you can do something to improve PCB looking and quality.

This is just my advice for you because this method is cheap and very easy.
__________________
My lasers:
Homemade Red laser @410mA LOC + AixiZ glass lens
Homemade Blue-Ray laser @ 100mA PHR-803T
O-like Green (532nm) 150mW module in UF WF-501B host
808nm 1W Homemade IR portable laser
3 motor spirograph (Homemade)
ReNNo is offline   Reply With Quote
Old 02-03-2010, 03:36 PM #38
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Agreed 100%.

Well, once I get it to power my PHRs, then I will try to make nicer PCBs, preferably with 'SPARK' written on them, that is so cool when you have the name of the driver on your PCB.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 02-03-2010, 03:49 PM #39
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Wait, what current you was trying to get from the unit, and what type of coil ?

You need to keep in consideration the saturation current, working with boost drivers, and not just the output current, for the coil ..... and the small "brick shape" coils that you can find on power lines, are not good for this ..... there are a lot of values to keep in consideration, for calculate the saturation current, Vout, current, frequency, and others, but for give you a quick help, just considerate a good current for the coil, if it's from 3 to 5 times the current that you want to get for the load (this is not a "scentific value", just a guideline) ..... basically, anyway, never less than 3 times (and this can also explain the instability of your tests, the coil saturate and the unit stop to regulate correctly) ..... can say, indicatively, that you need at least a 10uH 1,5A coil, for get a stable 200 / 300mA out at around 6V, with a decent stability and ripple factor .....
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 02-03-2010, 03:55 PM #40
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Quote:
Originally Posted by HIMNL9 View Post
Wait, what current you was trying to get from the unit, and what type of coil ?

You need to keep in consideration the saturation current, working with boost drivers, and not just the output current, for the coil ..... and the small "brick shape" coils that you can find on power lines, are not good for this ..... there are a lot of values to keep in consideration, for calculate the saturation current, Vout, current, frequency, and others, but for give you a quick help, just considerate a good current for the coil, if it's from 3 to 5 times the current that you want to get for the load (this is not a "scentific value", just a guideline) ..... basically, anyway, never less than 3 times (and this can also explain the instability of your tests, the coil saturate and the unit stop to regulate correctly) ..... can say, indicatively, that you need at least a 10uH 1,5A coil, for get a stable 200 / 300mA out at around 6V, with a decent stability and ripple factor .....
Well IgorT said he used 4.7 uH with LM3410Y version , which is 500 KHz switching freq.

I got free samples of 4.7 uH and around 1.5 A. Shielded, 4x4x2 milimeter dimensions.
Trying to power a PHR at 100mA from one lithium ion, no more. Or maybe I would like to make it capable of pushing 200 mA for 6x.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 07-30-2010, 03:43 PM #41
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
geologic geologic is offline
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Hi all

I'm building a constant current regulator to drive a LED using LM3410 in SEPIC mode. I'm using the circuit nš6, page 24 of the datasheet with the folowing changes in components:
LM3410XMFE SOT23-5 (instead of LM3410XSD LLP);
ON MBRS320T3G rated 0,4Vf 3A (instead of DFLS120L)
R1=1ohm to provide around 200mA

I use a CREE MC-E as a load. Powered everything with 3 AA batteries (4,5V), the LED made some flick and nothing... I saw some smoke comming between the inductors and powered everything off. I tryed another design and build another prototype. The same: some flick on the LED and some smoke... I notice that the inductors heat a lot... I double checked everything and seems to be connected ok. Do you think the PCB design could be the cause? I'm using Eagle to draw a single side PCB. Can you provide help? Thanks
geologic is offline   Reply With Quote
Old 07-30-2010, 04:20 PM #42
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Uhm, yes, PCB design is critical, for high frequency boost/switching drivers ..... also the coil need to hold the switching current, not just the output current (just as example, a 300mA circuit have usually as "suggested", a coil with a saturation current of 2 to 3 A)

Programs like Eagle and similars cannot manage these types of PCB, you need to do it "handy", probably .....
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 07-30-2010, 04:26 PM #43
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Quote:
Originally Posted by HIMNL9 View Post
Uhm, yes, PCB design is critical, for high frequency boost/switching drivers ..... also the coil need to hold the switching current, not just the output current (just as example, a 300mA circuit have usually as "suggested", a coil with a saturation current of 2 to 3 A)

Programs like Eagle and similars cannot manage these types of PCB, you need to do it "handy", probably .....
Hmm , odd...

He says, smoke between the inductors...
Are you using multiple inductors?

If so, get rid of them, and go to Coilcraft.com, and get appropriate coils suggested in the datasheet , or any of your desire if you know what you need.

Listen to HIMNL9 too, he knows more about that stuff than me.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 07-30-2010, 05:18 PM #44
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
geologic geologic is offline
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Quote:
Originally Posted by HIMNL9 View Post
Uhm, yes, PCB design is critical, for high frequency boost/switching drivers ..... also the coil need to hold the switching current, not just the output current (just as example, a 300mA circuit have usually as "suggested", a coil with a saturation current of 2 to 3 A)

Programs like Eagle and similars cannot manage these types of PCB, you need to do it "handy", probably .....
I'm using 4.7μH 3A from Coilcraft (exactly the ones mentioned on the LM3410 datasheet)... I tryed to make the design traces short and put everything close enough... See attached eagle image
Attached Thumbnails
My LM3410x based Boost converters: Spark driver!  PART 1-lm3410_1.png   My LM3410x based Boost converters: Spark driver!  PART 1-lm3410_2.png  
geologic is offline   Reply With Quote
Old 07-30-2010, 05:23 PM #45
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
geologic geologic is offline
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Quote:
Originally Posted by Eudaimonium View Post
Hmm , odd...

He says, smoke between the inductors...
Are you using multiple inductors?

If so, get rid of them, and go to Coilcraft.com, and get appropriate coils suggested in the datasheet , or any of your desire if you know what you need.

Listen to HIMNL9 too, he knows more about that stuff than me.
No multiple inductors, just 2 single ones from coilcraft, like on the SEPIC design.
Maybe i'll sacrify one of the boards and see which component burns...
geologic is offline   Reply With Quote
Old 07-30-2010, 05:30 PM #46
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Quote:
Originally Posted by geologic View Post
No multiple inductors, just 2 single ones from coilcraft, like on the SEPIC design.
Maybe i'll sacrify one of the boards and see which component burns...
It's possible that you shorted something out - STO23-5 is very tiny after all.

You should first recheck all your connections for shorts and OCs.
All that is really really tighly crammed on your board, too many possibilities of shorts.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 08-02-2010, 09:25 AM #47
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
geologic geologic is offline
Junior Member
 
Join Date: Jul 2010
Posts: 21
Rep Power: 0
geologic is on a distinguished road
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

Quote:
Originally Posted by Eudaimonium View Post
It's possible that you shorted something out - STO23-5 is very tiny after all.

You should first recheck all your connections for shorts and OCs.
All that is really really tighly crammed on your board, too many possibilities of shorts.
Yes, i already triplechecked everything, it seems all ok... And since this is the second PCB with a new design, it was to much coincidence the same error twice (shorts, oc...)...
I couldn't find the source of the smoke, but it seems that came from C3 (no more smoke, i think i killed some component)
I'll try another design for the PCB, like the one in the evaluation board (large sqares of copper instead of wires).
geologic is offline   Reply With Quote
Old 08-02-2010, 02:39 PM #48
pocketfluff's Avatar
Class 1M Laser
 
Join Date: Oct 2007
Location: Australia
Posts: 221
Rep Power: 10
pocketfluff is on a distinguished road
pocketfluff pocketfluff is offline
Class 1M Laser
pocketfluff's Avatar
 
Join Date: Oct 2007
Location: Australia
Posts: 221
Rep Power: 10
pocketfluff is on a distinguished road
Default Re: My LM3410x based Boost converters: Spark driver! PART 1

PCB design which is not optimal shouldn't cause it to blow. It will affect efficiency and regulation though. Just make sure you read the datasheet through and through so you dont misinerpret the layout.

If you blew a capacitor, was it a tantalum on reverse polarity?

BTW, I found that in sepic config, the lm3410 can't seem to handle the same currents it can in boost mode. The datasheet doesn't give many specifics or examples as to what it is capable of as a sepic converter.
pocketfluff is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 03:22 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC