treez
Advanced Member level 5
Find latest posts
View Articles
View Blog EntriesMini Statistics
- Join Date
- 22nd September 2008
- Last Activity
- 14th June 2019 07:05
- Blog Entries
- 0
More 4 Friends
Awards
No Awards.
Achievements
7 years registeredRecent Visitors
This page has had 16,825 visits
- Tab Content
- treez's Activity
- About Me
- Friends
- Experience
-
Older Activity
-
14th June 2019, 06:19treez started a thread Make component in LTspice in PCB Routing Schematic Layout software and SimulationHi Do you know how i can make a single component out of the attached LED string?...we are using loads of them in the sim and its taking ages to run.1 replies | 72 view(s) -
11th June 2019, 06:19200W Offline LED driver, 240VAC input. Done with Power factor corrected Boost then LLC. Output 250V, 0.8A Efficiency would be 93%....but do you...2 replies | 102 view(s)
-
9th June 2019, 19:41treez replied to a thread 500W-1kW offtheshelf offlien SMPS's with no fan (240VAC) in Power ElectronicsThanks, they have all got open grills in the top of the enclosure. It would be interesting to see how totally enclosed power supplies compare...eg...4 replies | 150 view(s)
-
9th June 2019, 10:41treez started a thread Thermal vias in pads..plated over in PCB Routing Schematic Layout software and SimulationHi, Our PCB manufacturer offers us thermal vias in dpak pads, and plated over on top and bottom sides. They are filled with epoxy. How come the air...4 replies | 149 view(s)
-
8th June 2019, 22:24yes your panels could give up to 88.7vout, so you need a buck battery charger to go between the solar panel and the battery. So you just need a step...5 replies | 155 view(s)
-
8th June 2019, 22:16if you want you can use an RT6208 based buck converter. The datasheet tells you how to set it up.6 replies | 210 view(s)
-
8th June 2019, 18:39treez started a thread 500W-1kW offtheshelf offlien SMPS's with no fan (240VAC) in Power ElectronicsHi We would like to see examples of offtheshelf SMPS's of 500W up to 1kW that have no fan cooling, to look at the sizings. By "no fan", we mean...4 replies | 150 view(s)
-
7th June 2019, 20:54Hi, Just got the JD for a electronics job making drinks machines. Are the power supplies likely to be bought in from China, or they...1 replies | 294 view(s)
-
4th June 2019, 19:45treez replied to a thread Fault mode of synchronous recrifier IC with BCM flyback in Power Electronicsits in BCM but there is a minimum on time, so in certain situations, it will be in DCM.3 replies | 223 view(s)
-
2nd June 2019, 14:04treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, by the way, the following circuit also works fine, but we dont want a bulky opto in there as we dont need the isolation. (ltspice and pdf...14 replies | 654 view(s)
-
2nd June 2019, 11:01treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, On the previous board, the original circuit of the top post (without optocouplers) worked absolutely fine, but we did not have the bridge...14 replies | 654 view(s)
-
1st June 2019, 22:00treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks to all, what about the following adjustment to the DALI receiver circuit?…now we have reduced the gain of the first NPN stage, making it a...14 replies | 654 view(s)
-
1st June 2019, 20:51here is an ltspice sim of a current regulator that you could find useful6 replies | 326 view(s)
-
1st June 2019, 19:45treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, No optocouplers. There are no other receivers on the dali bus. The 60W SMPS has an earth connection, but does have full isolation between...14 replies | 654 view(s)
-
1st June 2019, 13:26treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignYes....here is a scope shot of what the noise looks like at RA3.........top is what we should see, bottom is what we get. The micro isnt responding...14 replies | 654 view(s)
-
1st June 2019, 13:11treez replied to a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignThanks, We can actually put a 1206 resistor across the DALI bus, to give the lower load resistance (there is a not-fitted 1206 footprint there,...14 replies | 654 view(s)
-
1st June 2019, 12:31treez started a thread NPN is bahaving as oscillator when used with DALI comms bus in Analog Circuit DesignHi, We have a DALI communication setup. To be brief, DALI is basically square wave transmissions at 1200Hz. A DALI bus is pulled down and released...14 replies | 654 view(s)
-
27th May 2019, 15:46treez replied to a thread Isolated Dual interleaved PFC'd Flyback controller IC in Power ElectronicsThanks, will look into the FAN9611.........But with reference to the UCC28064A Dual interleaved PFC controller... We have just been looking into...20 replies | 1061 view(s)
-
27th May 2019, 14:10treez started a thread Regulation via low power bias coil instead of opto's on the mains output. in Power ElectronicsHi, We have a contractor who has done away with our feedback optocouplers which were connected up with our main 26V, 50W rail, ....instead he...2 replies | 186 view(s)
-
27th May 2019, 12:01treez started a thread Isolated Two transistor forward converter for Vin=220VDC, Vout=120W, 26V..sync rects in Power ElectronicsHello, We are doing an isolated 120W, 26Vout, Two Transistor Forward converter. Vin = the 220VDC output of a Boost PFC. I’ve always just used...0 replies | 123 view(s)
-
26th May 2019, 22:03Hello, Do you know of an Dual interleaving controller IC for Isolated , PFC’d Flybacks? The load would be connected to the output of the dual ...20 replies | 1061 view(s)
-
26th May 2019, 18:37Hello We are using the LT8309 synchronous rectifier for a PFC’d flyback on 80-135VAC input…26vdc output. We are using it like in the attached...3 replies | 223 view(s)
-
26th May 2019, 08:44Thanks, so it will survive, but will be slightly damaged, and then when the overvoltage repeats again anfd again, the cumulative damage will build...9 replies | 382 view(s)
-
26th May 2019, 08:15treez replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power Electronics...here's one at 200kHz https://en.wikipedia.org/wiki/Droitwich_Transmitting_Station - - - Updated - - - …Yes but common mode noise above...22 replies | 2242 view(s)
-
26th May 2019, 00:43Hi, The attached is a HV linear regulator based on a BSP19 BJT. This is rated 350V. At 100ms in the simulation, the VCE of BSP19 suffers a...9 replies | 382 view(s)
-
25th May 2019, 23:14treez replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power ElectronicsOK thanks, i think we agree that common mode noise always arises due to stray magnetic coupling to earth, or stray capacitive coupling to...22 replies | 2242 view(s)
-
25th May 2019, 11:51treez replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power Electronics...with Maxwell's Laws.....the EM flows around and inside the connecting wires...that is how the energy gets into the capacitor....ie, its the EM...22 replies | 2242 view(s)
-
25th May 2019, 09:30treez replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power Electronics..Yes indeed, I remember in Year 2 of Elec eng course , the Greek Microwave Doctor got up and prooved to us that when a capacitor charges...22 replies | 2242 view(s)
-
25th May 2019, 08:15treez replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power ElectronicsThanks EP, I see your point… Below is shown the two AC input common mode chokes that feature in a 70W offline flyback SMPS (240VAC) for a sold...22 replies | 2242 view(s)
-
24th May 2019, 20:57treez replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power ElectronicsThanks, i think the point is that on the face of it, if there is no earth connection wire to the product, then it appears that there cannot be any...22 replies | 2242 view(s)
About treez
Basic Information
- Date of Birth
- April 5, 1982 (37)
Areas of Interest
- Area of specialization:
- Power Electronics
Optional Info
- Biography:
- cyclist
- Location:
- cambridge
- Interests:
- football, cycling
- Occupation:
- engineer
Statistics
Total Posts
- Total Posts
- 6,671
- Posts Per Day
- 1.70
General Information
- Last Activity
- 14th June 2019 07:05
- Join Date
- 22nd September 2008
Helpful Postings
- Has Rated
- 5185
- Post Rated
- Rated helpful 483 out of 483 times
4 Friends
Showing Friends 1 to 4 of 4
Experience
Points
- Points
- 31,975
- Level
- 43
Level up completed
- Level up completed
- 67%
- Points required
- 475
Activity
- Activity
- 78.0%
- Activity last 30 days
- 86.0%
- Activity last 7 days
- 88.0%
Points
All Points for user
- Points for User
- 2,977
- Points for Reputation
- 977
- Points for every day since registration
- 1,988
- Points for Friends
- 12
All Points for threads
- Points for threads
- 6,789
- Points for Threads
- 1,756
- Points for tagging threads
- 1,856
- Points for replies
- 3,177
All Points for posts
- Points for Posts
- 22,209
- Points for Posts
- 19,782
- Average Posts per Day
- 1.00
- Helpful Answers
- 2,415
- Solved Threads
- 12
All Points for miscellaneous
- Points for Misc
- 0
Activities
15th June 2019
- 03:06 treez has earned 3 Points for threads points
- 03:06 treez has earned 3 Points for Posts points
- 03:06 treez has earned 1 Points for User points
12th June 2019
- 03:06 treez has earned 3 Points for threads points
- 03:06 treez has earned 3 Points for Posts points
- 03:06 treez has earned 1 Points for User points
10th June 2019
- 03:05 treez has earned 6 Points for Posts points
- 03:05 treez has earned 3 Points for threads points
- 03:05 treez has earned 1 Points for User points
9th June 2019
- 03:06 treez has earned 9 Points for Posts points
- 03:06 treez has earned 3 Points for threads points
8th June 2019
- 03:05 treez has earned 2 Points for threads points
- 03:05 treez has earned 2 Points for User points
5th June 2019
- 03:06 treez has earned 8 Points for Posts points
- 03:06 treez has earned 3 Points for User points
- 03:06 treez has earned 1 Points for threads points
3rd June 2019
- 03:06 treez has earned 6 Points for Posts points
- 03:06 treez has earned 3 Points for threads points
2nd June 2019
- 03:05 treez has earned 18 Points for Posts points
- 03:05 treez has earned 1 Points for User points
Show Activities from all Users