treez
Advanced Member level 5
Find latest posts
View Articles
View Blog EntriesMini Statistics
- Join Date
- 22nd September 2008
- Last Activity
- Today 19:08
- Blog Entries
- 0
More 4 Friends
Awards
No Awards.
Achievements
7 years registeredRecent Visitors
This page has had 17,565 visits
- Tab Content
- treez's Activity
- About Me
- Friends
- Experience
-
Older Activity
-
Today, 19:07Thanks, yes we are interested in current harmonics.11 replies | 729 view(s) -
Today, 06:11Thanks, its a periodic waveform of period 20ms....every period is identical to the others11 replies | 729 view(s)
-
Yesterday, 19:51Thanks, yes , our common mode choke is this one by wurth 7448640415 https://katalog.we-online.com/pbs/datasheet/7448640415.pdf8 replies | 305 view(s)
-
Yesterday, 19:40This scope... https://uk.farnell.com/multicomp-pro/mp720009-eu-uk/dso-2-ch-20mhz-10kpts-100msps/dp/3107568 ...11 replies | 729 view(s)
-
Yesterday, 11:37Hi This is a continuation of this thread if i may which is closed... https://www.edaboard.com/showthread.php?369575-Cheap-Mains-harmonics-tester...11 replies | 729 view(s)
-
16th September 2019, 20:12Hi I just bought two pieces of the IRS25752 IC from Farnell and its got no pin 1 marker. Do you know how i can tell which is pin1? There is...2 replies | 135 view(s)
-
16th September 2019, 06:29Thanks, presumably thats because the combination of the AC filter section and the TVS's ensures the downstream SMPS circuitry sees no more than...8 replies | 305 view(s)
-
15th September 2019, 21:33Thankyou...we have behind a diode (its for the 10W flyback and the diode is so the Power factor is not detrmiented) And there is 130nF oif ceramic...8 replies | 305 view(s)
-
14th September 2019, 17:44treez started a thread To which standards must we conform for our electronics/electrical product? in Professional Hardware and Electronics DesignHello My company has developed a way of removing body and facial hair for cosmetic reasons. It involves high frequency flashing (~1KHz) of high...4 replies | 312 view(s)
-
14th September 2019, 17:05Thanks, the 100pF caps were placed across diff mode inductors...i was assured by the engineer that it was for moving peaks on the scan to get the...14 replies | 2124 view(s)
-
14th September 2019, 11:53I have seen quite a few offline SMPS schematics with 100pF or so capacitors across the diff mode filter inductors. This is said to offer the...14 replies | 2124 view(s)
-
14th September 2019, 10:03Hi, We wish to analog dim this chip down to 25% output, and then we obviously have to PWM dim to further get the leds dimmer from there. I trust...1 replies | 155 view(s)
-
14th September 2019, 00:41As can be seen, this LSP05240 Mains Surge module lets through up to 1100V of ‘residual’ voltage. Obviously, the surge module has to go upstream of...8 replies | 305 view(s)
-
13th September 2019, 22:34Hi I attended an interview and they briefly showed a schem of a 650W Boost PFC. Just downstream of the Diode, there was a gate controlled device,...4 replies | 308 view(s)
-
8th September 2019, 20:41treez started a thread Type one compensator...why is everybody giving it a phase of -90 degreees in Power ElectronicsSurely a type one compensator phase vs frequency Bode plot should always be drawn with -270 degrees phase? I mean, -180degrees for the inverting...2 replies | 197 view(s)
-
8th September 2019, 19:54I did one like that but it was very low power......it was because my PCB was connected to a 50khz power bus and had to slowly charge a battery from...6 replies | 313 view(s)
-
8th September 2019, 19:47treez started a thread SMPS feedback compensation..origin pole is "pole at origin"? in Power ElectronicsHi http://www.ti.com/lit/an/slva662/slva662.pdf ..pg 4 , equation 8 of the above doesnt make sense....because "fp0" is zero Hertz...it has to be...3 replies | 321 view(s)
-
8th September 2019, 12:12To design a half bridge transformer, first design a virtual buck converter with your vout. Decide what is your max duty cycle (say 0.7). So you...8 replies | 570 view(s)
-
8th September 2019, 12:01treez started a thread SMPS feedback loop parameters...."Excess phase" is king? in Power ElectronicsHello, I am reading page 205 of “power supply cookbook” by Marty Brown, 2nd ed. It says that there are three main parameters in SMPS stability…...0 replies | 110 view(s)
-
8th September 2019, 10:26Thanks Klaus, especially for your great help on this subject some time ago aswell. I wonder when we have people charging electric cars all over the...7 replies | 482 view(s)
-
8th September 2019, 10:10Thanks, at one of the worlds major TV design/manufacturers, they were using a ferrite bead in the place where i show a drain_inductor....(they...4 replies | 308 view(s)
-
7th September 2019, 20:40How is the mains so stable in large cities like London?....surely it is because there are thousands of micro generators all over London, with...7 replies | 482 view(s)
-
7th September 2019, 19:27Yes, when the diode goes off, the diode voltage suddenly collapses from abotu 0.7v to zero, and its klind oif liek a step input, and the buick...2 replies | 265 view(s)
-
7th September 2019, 19:21treez replied to a thread SMPS PFC+LLC/Flyback 24V 100W low THD cool thermals reference design? in Power Electronicsor you could do a simple BCM Boost PFC....followed by Innoswitch syncronous rectified flyback on the output.3 replies | 353 view(s)
-
7th September 2019, 19:14treez replied to a thread Flyback SMPS power MOSFET getting hot? uc3843 pwm converter in Power Electronics2v is too low for a fet to turn on properly. What is your vin. What is the gate series resistor value. Can you show scoep shot of gate voltage on...17 replies | 631 view(s)
-
7th September 2019, 19:09There is a small inductor in the drain of the fet of this boost converter (attached). It massively reduces the reverse recovery spike that goes...4 replies | 308 view(s)
-
5th September 2019, 19:40treez started a thread [moved] Switch mode power supply interview question and response...bluffing? in Power ElectronicsAt an interview today, the engineer told me that Voltage mode controlled SMPS’s need slope compensation to be added when the duty cycle goes...3 replies | 304 view(s)
-
3rd September 2019, 14:54Hi, The MCP6001 offers "rail to rail input and output".....but if the vin goes above 3.1v, then it latchs up to the 3.3v rail. Do you know where in...1 replies | 219 view(s)
-
3rd September 2019, 06:18Thanks, sorry i thought you were going to say .... "For an SMPS the Earth current is the unwanted = leakage current, plus the capacitive current." ?7 replies | 462 view(s)
-
2nd September 2019, 20:44Thanks, Precision around +/-0.05v vbus/300 is made from a potential divider fed to a opamp buffer. Load impednace >10Meg4 replies | 305 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
- 6,791
- Posts Per Day
- 1.69
General Information
- Last Activity
- Today 19:08
- Join Date
- 22nd September 2008
Helpful Postings
- Has Rated
- 5291
- Post Rated
- Rated helpful 491 out of 491 times
4 Friends
Showing Friends 1 to 4 of 4
Experience
Points
- Points
- 32,609
- Level
- 44
Level up completed
- Level up completed
- 11%
- Points required
- 1,341
Activity
- Activity
- 99.5%
- Activity last 30 days
- 83.0%
- Activity last 7 days
- 87.0%
Points
All Points for user
- Points for User
- 3,041
- Points for Reputation
- 993
- Points for every day since registration
- 2,036
- Points for Friends
- 12
All Points for threads
- Points for threads
- 6,971
- Points for Threads
- 1,807
- Points for tagging threads
- 1,922
- Points for replies
- 3,242
All Points for posts
- Points for Posts
- 22,597
- Points for Posts
- 20,130
- Average Posts per Day
- 1.00
- Helpful Answers
- 2,455
- Solved Threads
- 12
All Points for miscellaneous
- Points for Misc
- 0
Activities
18th September 2019
- 03:06 treez has earned 4 Points for threads points
- 03:06 treez has earned 3 Points for User points
- 03:06 treez has earned 14 Points for Posts points
17th September 2019
- 03:05 treez has earned 6 Points for Posts points
- 03:05 treez has earned 3 Points for threads points
16th September 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
15th September 2019
- 03:05 treez has earned 9 Points for Posts points
- 03:05 treez has earned 10 Points for threads points
14th September 2019
- 03:05 treez has earned 6 Points for Posts points
- 03:05 treez has earned 5 Points for threads points
- 03:05 treez has earned 3 Points for User points
9th September 2019
- 03:06 treez has earned 7 Points for threads points
- 03:06 treez has earned 26 Points for Posts points
- 03:06 treez has earned 2 Points for User points
8th September 2019
- 03:06 treez has earned 6 Points for threads points
- 03:06 treez has earned 15 Points for Posts points
- 03:06 treez has earned 1 Points for User points
6th September 2019
- 03:06 treez has earned 3 Points for Posts points
Show Activities from all Users