Broken Meanwell LDD driver - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 06-24-2016, 09:56 PM Thread Starter
Algae Grower
 
dentex's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2016
Posts: 6
Broken Meanwell LDD driver

Hello guys!
Sorry if I jump straight here and shoot this question... Usually I don't do like this, but what happened it's kinda weird and I'm badly searching for an answer.

-> Do the LDD drivers burn (break and become unusable, with a "pop" and a bad smell) when they receive the input power but no LED it's attached to them? Because this is what just happened to the only one (of five drivers) I had unconnected to any LED.

I was testing a custom built board:
- Three 700H had LEDs... OK.
- One 1000H had nothing attached, but was shut off (grounding the PWM pin through a resistor)... OK.
- The one left "on" broke (the one with no LEDs attached and with the switch putting the PWM pin to ground in "off" position).

Thanks in advance for any suggestion.

Probably I need to add some details. In this case, if anything is needed, ask please! Thanks again.
dentex is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 06-24-2016, 10:07 PM
Planted Tank Guru
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: WI
Posts: 11,130
usually they pop when wired backwards...
Quote:
LOL _ I'm sure that there's a very, very small percentage of LDD's that fail for reasons other than user error, but the most of the time it is user error. I get PM's from time to time stating that the user's LDD's have blown and the claim is made that it happened due a design defect in one of the PcB's that I've posted here. I always request photos to asses the damage and do a bit of forensic analysis. Every time I've looked at the photos the cause was obvious, either the input wires were crossed, the bottom of the PcB had been shorted to the heat sink, OR the most prevalent- The LDD's were inserted into their holders Backwards! It really should be repeated more often- "check and double check your connections before applying power". It's also a good idea, when working with multiple LDD's, if there are any doubts concerning wiring, proper polarity ect..., only power up one LDD at a time. This way- if something goes wrong, you only smoke one! Not all of them!
Just my .02
http://reefcentral.com/forums/showth...222702&page=84

"A man with a watch knows what time it is. A man with two watches is never sure."
jeffkrol is online now  
post #3 of 10 (permalink) Old 06-24-2016, 10:13 PM Thread Starter
Algae Grower
 
dentex's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2016
Posts: 6
1st of all thanks for answering...

Do you mean the inputs? Swapped?
Well, I used that "channel" on the board previously... it has been wired... and worked... so I really don't understand what happened.


Seeing now the quote and the link... double thanks!
dentex is offline  
 
post #4 of 10 (permalink) Old 06-24-2016, 10:22 PM Thread Starter
Algae Grower
 
dentex's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2016
Posts: 6
Anyway... I hope the problem was a "short" on the bottom of the board... because I had a screwdriver near it... Or tomorrow I'll blow another 1A LDD.
dentex is offline  
post #5 of 10 (permalink) Old 06-24-2016, 10:28 PM
Planted Tank Guru
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: WI
Posts: 11,130
most of my power supplies are 48V or larger and have yet to blow an LDD w/ a hot swap or hot fire..though that doesn't mean it isn't possible..

"A man with a watch knows what time it is. A man with two watches is never sure."
jeffkrol is online now  
post #6 of 10 (permalink) Old 06-24-2016, 10:33 PM Thread Starter
Algae Grower
 
dentex's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2016
Posts: 6
Ok. So you exclude that powering the drivers without LEDs can blow them, right? ATM I'm sure of nothing.
dentex is offline  
post #7 of 10 (permalink) Old 06-24-2016, 10:48 PM
Children Boogie
 
mistergreen's Avatar
 
PTrader: (13/100%)
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
Check the in/out connectors on the LDD with your voltmeter. If it burnt, the circuit may be broken.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mistergreen is offline  
post #8 of 10 (permalink) Old 06-24-2016, 10:51 PM Thread Starter
Algae Grower
 
dentex's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2016
Posts: 6
I suspect it's gone forever. It popped, partially melting on the top side, near the Vin+/dim pins.

I'm almost sure it was correctly inserted. As I said, it just didn't have its LED connected.
dentex is offline  
post #9 of 10 (permalink) Old 06-24-2016, 11:00 PM
Children Boogie
 
mistergreen's Avatar
 
PTrader: (13/100%)
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
Check your connections. Not having the LEDs connected won't kill it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mistergreen is offline  
post #10 of 10 (permalink) Old 06-24-2016, 11:03 PM Thread Starter
Algae Grower
 
dentex's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2016
Posts: 6
Ok thank you very much. Tomorrow I'll test the channel with another driver...

Edit: All went Ok...
Incriminated channel worked with a 700H driver and also with a 1000H plus other stuff attached.


[Thanks mod, I'll do it ]

Last edited by dentex; 06-26-2016 at 07:49 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
dentex is offline  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome