treez
Advanced Member level 5
Find latest posts
View Articles
View Blog EntriesMini Statistics
- Join Date
- 22nd September 2008
- Last Activity
- Yesterday 08:56
- Blog Entries
- 0
More 4 Friends
Awards
No Awards.
Achievements
7 years registeredRecent Visitors
This page has had 15,823 visits
- Tab Content
- treez's Activity
- About Me
- Friends
- Experience
-
Older Activity
-
22nd January 2019, 21:58Hi, With Undervoltage lockout in tinyswitch4, if current into EN pin gets less than 23.75uA then the part switches off. Does the part immediately...2 replies | 94 view(s) -
21st January 2019, 09:05treez started a thread Feeding DMM with 5V source instead of batteries. in Elementary Electronic QuestionsHi, We have a mastech MS3229 DMM. It uses 3 AAA batteries, but doesn’t indicate when the batteries are going flat, -the readings just get...5 replies | 159 view(s)
-
19th January 2019, 20:19treez started a thread Why is the European mains voltage so well regulated? in Elementary Electronic QuestionsHi, There is no formal regulation on the mains, so how does it manage to be so well regulated? In Germany (Bavaria) over a long weekend, the mains...11 replies | 532 view(s)
-
19th January 2019, 08:28treez replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsThe "J"s are smd resistors used as jumpers - - - Updated - - - The problem we always are told about with 2oz copper is that it can't be used...12 replies | 386 view(s)
-
17th January 2019, 11:46treez started a thread How can you tell if big quantities of a component will be immediately available? in Elementary Electronic QuestionsWe have put one of the ECW-FD2J185K film capacitors onto our PCB. It is 1.8uF, 630VDC, and dimensions 25.3mm by 11.2mm by 16.5mm (= l x w x h). In...3 replies | 299 view(s)
-
16th January 2019, 09:09Hi Does anyone know where this is?, i cant find it on microchip.com2 replies | 166 view(s)
-
15th January 2019, 20:29treez replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsThanks, The attached is what we did so far. It is a double sided FR4 board. As you can see, there just isn’t enough room for thermal copper pour for...12 replies | 386 view(s)
-
15th January 2019, 07:07treez replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsThanks, its like this sort of thing https://www.multi-circuit-boards.eu/en/pcb-design-aid/layer-buildup/metal-core-pcb.html ....we are trying to...12 replies | 386 view(s)
-
14th January 2019, 21:39treez started a thread MCPCB which is double sided and with plated through vias in Power ElectronicsHi We wish to make a 6W Buckboost switch mode lighting PCB (15cm by 1.8cm) with LEDs one side and the driver electronics the other side....12 replies | 386 view(s)
-
13th January 2019, 20:51treez replied to a thread TO247 FET mounted in "SMD" fashion and pressurized against heatsink with "foam" in Thermal ManagementThanks, the big flat heatsink is essentially the case. The PCB is screwed to that. The small rectanguloid heatsink is somehow to be connected to ...6 replies | 616 view(s)
-
13th January 2019, 13:20treez replied to a thread Common mode noise and earth connections in offline SMPS in Power ElectronicsThanks, As we know, Common Mode noise in SMPS is always the hardest one to minimise. We try to understand it better so as to be able to better...4 replies | 246 view(s)
-
13th January 2019, 12:41treez replied to a thread TO247 FET mounted in "SMD" fashion and pressurized against heatsink with "foam" in Thermal ManagementThanks, the big flat heatsink isnt thin enough to be riveted. Unfortunately, we cannot put holes into it, in any case, they have already been...6 replies | 616 view(s)
-
13th January 2019, 12:31Hello, We are using the IPP90R1K2C3 FET in our offline SMPS. Its junction temperature is 105 degC. We wish to know how long it will last. ...1 replies | 155 view(s)
-
12th January 2019, 19:10treez started a thread "Crystal set" radio works only when connected to earth in Elementary Electronic QuestionsHello, I made a crystal radio {no batteries, just a ferrite rod antenna, adjustable air dielectric capacitor, and a switching diode (for...5 replies | 300 view(s)
-
12th January 2019, 18:56I presume you mean ferrite inductors....some maunfacturers like vishay, coilcraft, Wuerth, give software to allow you to calculate core loss in...6 replies | 375 view(s)
-
12th January 2019, 18:42We have an offline, isolated LED driver in a plastic enclosure. Wires from the enclosure feed the LEDs which sit on MCPCB which is mounted on a big...4 replies | 246 view(s)
-
12th January 2019, 17:57treez started a thread TO247 FET mounted in "SMD" fashion and pressurized against heatsink with "foam" in Thermal ManagementWe have a 4 layer PCB on which we have our offline , all surface mount, LED driver. This PCB sits on a thin thermal pad and this all lies...6 replies | 616 view(s)
-
11th January 2019, 23:18treez started a thread Stacked paralleled SMC TVS's are available? in Elementary Electronic QuestionsHello, We need two SMCJ440A TVS's inm parallel but theres only room for one on the PCB. Does anyone sell stacked TVS's in J-Leads? TVS ...1 replies | 183 view(s)
-
3rd January 2019, 14:18yes you have lots of current there. For you, i think its either relay, or back to back fets or back to back igbts. And of course you need some...6 replies | 366 view(s)
-
2nd January 2019, 19:01You could also buy yourself a diff probe...say a TA041....then you can probe it. i presume the tny280 is set up as a flyback, so can you see if the...25 replies | 1485 view(s)
-
2nd January 2019, 18:33Thanks FvM, it states that even the 0.2mm ECW is rated to 1800V.3 replies | 259 view(s)
-
1st January 2019, 21:00treez replied to a thread Aluminium foil placed round inside of plastic SMPS enclosure in Thermal ManagementThanks i see your point ref hot spots. I must admit though, i wonder why they dont just mount the PCB in such a way that the hot heatsinks and...5 replies | 732 view(s)
-
1st January 2019, 14:04Hello, Page 18 to 20 of the below app note concerns the design of a transformer for a 65W Flyback SMPS. The primary and the bias winding are...3 replies | 259 view(s)
-
1st January 2019, 14:03treez started a thread Aluminium foil placed round inside of plastic SMPS enclosure in Thermal ManagementOn page 29 of the below app note, there is a “heat spreader”. This is simply a “wrapping” of aluminium foil to go round the inner wall of a totally...5 replies | 732 view(s)
-
30th December 2018, 23:50treez replied to a thread Measuring air gap of a magnetic core for home-wound inductors and flyback transformer in Power Electronicsyes i would be wary of low cost gapping tools..because if ferrite is not gapped with sensitivity, then the ferrite can get fractures in it which can...7 replies | 476 view(s)
-
30th December 2018, 23:32treez replied to a thread Which package of Flyback controller has the lowest RTH(JA) value in our case? in Thermal ManagementThanks, good points, i see what you mean. We were worried about the actual solder thats needed to bond the part to the heat pad getting wicked away...4 replies | 313 view(s)
-
30th December 2018, 14:15treez replied to a thread Digital multimeter appears to have measured voltages lower than expected. in Elementary Electronic QuestionsThanks, i thought some of the cheap meters, due to their inclusion of protection circuitry to protect against connection to overly high voltages,...19 replies | 989 view(s)
-
30th December 2018, 14:08treez replied to a thread Which package of Flyback controller has the lowest RTH(JA) value in our case? in Thermal ManagementThanks, i only put 9 thermal vias in the heat pad, because we are worried about wicking of solder through the thermal vias. (they are 0.3mm...4 replies | 313 view(s)
-
30th December 2018, 00:59treez started a thread Which package of Flyback controller has the lowest RTH(JA) value in our case? in Thermal ManagementHello, We have designed a 5W, 24V Offline Flyback SMPS (240VAC input). We are using a TNY287 controller which also comprises the switching FET....4 replies | 313 view(s)
-
26th December 2018, 16:15Are you sure you are triggering the TRIAC once evry 10ms and not every 20ms...because the latter will cause flicker...also, i successive 10ms half...3 replies | 339 view(s)
About treez
Basic Information
- Date of Birth
- April 5, 1982 (36)
Areas of Interest
- Area of specialization:
- Power Electronics
Optional Info
- Biography:
- cyclist
- Location:
- cambridge
- Interests:
- football, cycling
- Occupation:
- engineer
Statistics
Total Posts
- Total Posts
- 6,457
- Posts Per Day
- 1.71
General Information
- Last Activity
- Yesterday 08:56
- Join Date
- 22nd September 2008
Helpful Postings
- Has Rated
- 4994
- Post Rated
- Rated helpful 471 out of 471 times
4 Friends
Showing Friends 1 to 4 of 4
Experience
Points
- Points
- 30,933
- Level
- 42
Level up completed
- Level up completed
- 92%
- Points required
- 117
Activity
- Activity
- 80.0%
- Activity last 30 days
- 65.0%
- Activity last 7 days
- 73.0%
Points
All Points for user
- Points for User
- 2,882
- Points for Reputation
- 953
- Points for every day since registration
- 1,917
- Points for Friends
- 12
All Points for threads
- Points for threads
- 6,502
- Points for Threads
- 1,699
- Points for tagging threads
- 1,733
- Points for replies
- 3,069
All Points for posts
- Points for Posts
- 21,549
- Points for Posts
- 19,182
- Average Posts per Day
- 1.00
- Helpful Answers
- 2,355
- Solved Threads
- 12
All Points for miscellaneous
- Points for Misc
- 0
Activities
23rd January 2019
- 03:05 treez has earned 3 Points for Posts points
- 03:05 treez has earned 2 Points for threads points
- 03:05 treez has earned 1 Points for User points
22nd January 2019
- 03:05 treez has earned 5 Points for threads points
- 03:05 treez has earned 3 Points for Posts points
- 03:05 treez has earned 1 Points for User points
20th January 2019
- 03:06 treez has earned 6 Points for Posts points
- 03:06 treez has earned 4 Points for threads points
- 03:06 treez has earned 1 Points for User points
18th January 2019
- 03:06 treez has earned 3 Points for Posts points
- 03:06 treez has earned 2 Points for threads points
17th January 2019
- 03:05 treez has earned 4 Points for threads points
- 03:05 treez has earned 3 Points for Posts points
- 03:05 treez has earned 1 Points for User points
16th January 2019
- 03:06 treez has earned 6 Points for Posts points
- 03:06 treez has earned 2 Points for threads points
15th January 2019
- 03:06 treez has earned 6 Points for threads points
- 03:06 treez has earned 3 Points for Posts points
- 03:06 treez has earned 1 Points for User points
14th January 2019
- 03:05 treez has earned 12 Points for Posts points
Show Activities from all Users