38 Threads found on edaboard.com: sg3525 Design
The output from this IC is a square wave, so if possible use ICs which can generate sine waves, for example MAX038 ..
However, there is another option ..
If the output frequency doesn't change much you can consider a multi-pole passive/active filter connected to the sg3525 output .. This filter should filter out most of higher harmonics and the
Hobby Circuits and Small Projects Problems :: 20.03.2006 02:20 :: IanP :: Replies: 2 :: Views: 3672
sg3525 is another one
Professional Hardware and Electronics Design :: 03.01.2008 22:20 :: manish12 :: Replies: 4 :: Views: 1931
i need sg3525 based pushpull converter design examples (transformer, mosfet,etc)
Analog Circuit Design :: 17.07.2007 03:34 :: satya_vijayawada :: Replies: 3 :: Views: 2105
for 1KVA you need 24 v or more input volt you can use sg3525 to drive mosfet and a 9-0-9 v 230v 1KVA transformer if you nedd to regulate output
Professional Hardware and Electronics Design :: 11.08.2008 02:25 :: rajudp :: Replies: 22 :: Views: 17723
Take a look at sg3525 PWM controller. Very easy to set up. Then use two MOSFETs in push-pull configuration. Step it up using ferrite transformer. Rectify the output. Then run it through a 50Hz H-bridge using another sg3525 and IR2110 or other such driver. Done! voila! an SMPS inverter. Too bad its not as easy as it seems. But you can master it with
Hobby Circuits and Small Projects Problems :: 30.12.2009 12:51 :: Tahmid :: Replies: 5 :: Views: 7357
I m using PWM IC sg3525
but problem is this that whwn i use feedback circuitry one phase leg get destructed the mosfet i m using is 2907
have any body a solution for this................?
Power Electronics :: 04.03.2010 04:59 :: basit.abs :: Replies: 6 :: Views: 2453
The sg3525 is simply a PWM chip, not SPWM.
Electronic Elementary Questions :: 25.04.2010 06:18 :: keith1200rs :: Replies: 5 :: Views: 4734
If you mean with no transformers, not even ferrite ones, then you have to first step up the battery voltage to high voltage (260-300v) using boost converter and then use H-bridge converter.
I think what you mean, is, without heavy iron core transformer. In that case, use SMPS with a ferrite transformer. First step up battery voltage using a pus
Power Electronics :: 18.01.2011 11:52 :: Tahmid :: Replies: 4 :: Views: 2194
I have a few questions.
What is the input voltage ,output voltage and what power do You intend to achieve.
Do You need currentmode or is the choice of SG3524 a matter of availability?
You can use the SG3524 for DC-Dc converters in pushpull setup (depending on the inputvoltage)
Personaly i prefer to use mosfets instead of transistors.
Power Electronics :: 24.02.2011 10:02 :: walkura :: Replies: 1 :: Views: 1555
what's the purpose of using VR1 and VR2 in this circuit?
Power Electronics :: 09.10.2011 12:46 :: kg300 :: Replies: 16 :: Views: 5029
thanks for your patience and the enthusiasm to help. i will try and break my need down as close as possible.
i am trying to build an iverter using the sg3525 to drive a ferrite in push pul configuration and generate a voltage of 325 dcv at 5khz. then i am going to use pic to generate sinewave in fullbridge mode at about 5khz.
Analog Circuit Design :: 06.05.2012 10:37 :: babatundeawe :: Replies: 72 :: Views: 5803
Thanks for all!!!
Now i have got an outline of the design.
I am going to use 12V 135Ah battery and design a 1000W inverter(i don't mind even if it comes for less than 1 hour)
The inverter will be a switched mode type.
*I will convert first 12V dc to 320V dc(DC-DC converter) using sg3525 ,a High frequency transformer(such as ferrite core) and (...)
Power Electronics :: 30.05.2012 23:04 :: sriblue7 :: Replies: 34 :: Views: 2230
Hi..I want the circuit diagram for designing 500W or 1kW inverter with transformer (12V to 220V).
Thanks in advance..
Use a PWM chip such as sg3525. Use MOSFETs for driving the transformer. Use feedback to achieve voltage regulation with variations in battery voltage and load. That's the inverter there. Now you just n
Power Electronics :: 23.08.2012 06:16 :: Tahmid :: Replies: 4 :: Views: 1189
I have found one for SG2525 after searching online. I've attached the .DSN file utilizing the SG2525 part. You can use this for simulation of sg3525 as the differences between sg3525 and SG2525 aren't too great, as you can see in the datasheet.
already uploaded here contain some other chip as well
PCB Routing Schematic Layout software and Simulation :: 31.08.2012 03:44 :: Fragrance :: Replies: 12 :: Views: 2770
hi guys, I intend to design an inverter using sg3525. the problem i have is how i could connect the low voltage disconnect, set frequency at 50hz and control the output voltage. can anyone send me a circuit diagram that can help me achieve this on my email; firstname.lastname@example.org
thanks in advance.
Hobby Circuits and Small Projects Problems :: 27.11.2012 12:49 :: Dirosoma :: Replies: 1 :: Views: 795
I have made car amplifier 1x100W 4ohm.The dc/dc converter is made with sg3525 PWM, two buz11 mosfets,torodial ferite trafo.The Amplifier is consist of one pair tranzistors tip35c,tip36c.
I HAVE MADE IT AND IT SOUND PERFECT.Now i need schematic for making dcprotection for speaker.
Here is the schematic and picture
Electronic Elementary Questions :: 22.06.2004 20:37 :: risto80 :: Replies: 7 :: Views: 12550
Sorry, its sg3525.
Electronic Elementary Questions :: 21.07.2004 13:27 :: bimbla :: Replies: 17 :: Views: 8326
i am doing buck converter design i searched many sites i did't get the PSPICE lib files can any one having plz send me
SG3524 sg3525 SG3526, UC3906 UC3823
Analog Circuit Design :: 19.07.2007 00:28 :: netaji patra :: Replies: 3 :: Views: 2015
I don't think so, it is good idea to build a SMPS for multi-outputs with a simple 555 timer. Try to think of using LM3524 or sg3525 etc (PWM based) and design for specifically for SMPS. Any how following is a circuit based on 555 for tube light conversion. You can pick an idea and modify this circuit.(if you insist on 555 only). Second circuit is b
Analog Circuit Design :: 23.12.2007 08:17 :: Awarapunshee :: Replies: 10 :: Views: 4692
try and do some search on sg3524 and sg3525. these are components that are very good for building inverters you just have to do some little calculation to bring it to life. hope to load up some circuits for u. later
Added after 1 hours 14 minutes:
Hello there,I am Randolf F.Abadier, I hope th
Professional Hardware and Electronics Design :: 24.05.2008 16:11 :: babatundeawe :: Replies: 8 :: Views: 2578
I would use a microcontroller such as PICAXE that can directly take signal from tacho and convert it (BASIC application) to PWM, and if you need to change something it is only a change in software ..
I?m afraid that F/V conversion with the LM2907 and then V/PWM conversion with sg3525 may make the system unstable, as these IC were not specially d
Analog Circuit Design :: 14.01.2009 22:45 :: IanP :: Replies: 3 :: Views: 2054
For 800W output its ok an half-bridge with 2xIRFP460 mos-fet's,or STE40NK90ZD super mosfets.
Don't need synchronous rectification for output.Its ok an dual 30A/200V fast recovery diode.
For PMW IC its better an sg3525 IC than TL494.
For schematic check diyaudio forum.You find lots of schematics there.
Power Electronics :: 15.12.2009 10:45 :: adi109cj :: Replies: 4 :: Views: 2595
36 to 280v means a Vout/Vin ratio of (280/36) = 7.8. Power rating = 700W. With these things in mind, boost converter isn't a wise choice at this power level. You should instead use push-pull or full-bridge topology. If you have the proper program, use attiny else you can use a cheap easily available PWM chip like SG3524 / sg3525 / SG3
Power Electronics :: 30.12.2009 11:41 :: Tahmid :: Replies: 2 :: Views: 1293
I used push-pull topology with sg3525 and regulated the output with feedback (resistive divider). Then I used PIC12F675 to provide 50Hz pulse with 80% duty cycle to provide modified square wave output.
What is your push pull dc/dc output volt ,?
Power Electronics :: 08.05.2010 13:02 :: rajudp :: Replies: 25 :: Views: 4759
First you need to change the supply from 12v to maybe 48v.
Then, you need to become familiar with sg3525 or SG3524, LM339, 4N35 or similar PWM chips, comparators, optocouplers. Then you need to go about deciding what or how you are going to do at each section of the circuit, eg. battery charging, hicut, locut, overload cut, feedback, etc.
Power Electronics :: 30.06.2010 10:55 :: Tahmid :: Replies: 8 :: Views: 1873
Like you said, there are many possible options. To have something between an efficient design and simplicity at reasonable current outputs, I would say you could use a step down transformer and use a switching regulator. For switching regulator, check L4971, L4964, L4970, L496x, L497x. Transformer should be easy to acquire.
The easiest solution
Power Electronics :: 19.12.2010 09:31 :: Tahmid :: Replies: 2 :: Views: 718
Assuming that your motorcycle battery is 12v, this is the simplest circuit I can think
The controller is sg3525. RT and CT determine the frequency, RD the deadtime.
Hope this helps.
Hobby Circuits and Small Projects Problems :: 24.12.2010 04:32 :: Tahmid :: Replies: 3 :: Views: 1657
Lately I've been trying to design a buck converter. The goal is to have this thing run off of a 4S lipo (14V) and have and adjustable output voltage from 14V to 5V at 20 or so amps. It's going to be powering a ZVS+Flyback+Voltage multiplier to put out say 50 to 70kV (adjustable via the smps).
I have used the sg3525 before for pwm purposes, but I
Analog Circuit Design :: 24.01.2011 13:23 :: grenadier :: Replies: 2 :: Views: 345
sg3525 is probably like TI/Unitrode UC1525 / 3525, a very simple voltage
mode regulating PWM. Certainly cheap; almost certainly not the best.
I found no 30V output DC-DC modules on Digi-Key. It's an abnormal
voltage. If you could stand 24 or 28V you'd have more luck. You
might be looking for an adjustable.
Building two single-output DC-DCs
Power Electronics :: 19.06.2011 20:47 :: dick_freebird :: Replies: 8 :: Views: 820
I wouldn't use that circuit for more than 100W.
For 500W, you should use MOSFET. This will give you much lower losses.
Instead of CD4047, you should use a PWM chip such as sg3525. You can then control the output and maintain a fixed output by keeping it regulated through PWM. The output voltage of the circuit you referenced will change with chang
Power Electronics :: 22.02.2012 14:03 :: Tahmid :: Replies: 17 :: Views: 1352
You can use a buck converter.
For this, you can use a dedicated controller for such a purpose or you can use a general-purpose PWM chip like UC3845.
If you use the second suggestion, you need to design a start-up section which can be a simple resistor. You can use the UC3845 to drive N-channel MOSFETs in high-side configuration. For this you will
Power Electronics :: 13.03.2012 09:00 :: Tahmid :: Replies: 6 :: Views: 697
I m really grateful to you for such a nice reply. One more question is circling around my mind. What if I take feedback from the 400V DC to sg3525?
Power Electronics :: 27.03.2012 04:15 :: MAXPAYNE :: Replies: 41 :: Views: 3029
I am new here on this forum. I hope someone can help me design a Half-Bridge Converter. I want to design a Half-Bridge DC-DC converter with an input voltage varies from 350-400Vdc and output of
3-35Vdc@10A max. with adjustable output voltage. I would like the SMPS to have current overload protection (short circuit, over current), overv
Power Electronics :: 10.05.2012 02:31 :: ZeroKool :: Replies: 6 :: Views: 1040
This one is famous and is tested by many others.
But obviously, sg3525 cannot produce "pure sine". It produces modified sine through pwm. It is made pure to some extend by low pass filters.
Analog Circuit Design :: 25.09.2012 09:09 :: Genovator :: Replies: 8 :: Views: 784
Can you please give me full circuit diagram with explanation for this type of inverter based on SG3524,sg3525.
Is sg3525 better in terms of performance or features?
Power Electronics :: 06.11.2012 08:46 :: manishanand14 :: Replies: 19 :: Views: 1005
You should start with a small capacity inverter, like 100W. Then scale it up for your required power.
Start learning on the various blocks - PWM control section, feedback section, MOSFET drive section, power stage, output filter, etc.
Two very common PWM controllers you could take a look at are sg3525 and SG3524.
You can find lots of inverter-re
Power Electronics :: 23.12.2012 02:32 :: Tahmid :: Replies: 12 :: Views: 1069
Regarding the design of the inverter, assuming that you're using a 50Hz transformer to step up, the stages are:
Power MOSFET driver stage
Power MOSFET stage
Output regulation / feedback stage
Additional features - Battery low cut, overload protection, short-circuit protection, etc
As for the PW
Power Electronics :: 27.01.2013 13:56 :: Tahmid :: Replies: 5 :: Views: 373
At this current and power level, you should look to use a switching regulator. These usually work as buck converters. You can choose a specialized buck controller and use it as the main controller in your converter. You may use general purpose PWM controllers like sg3525 or UC3842. You may even use a readily available (but rather expensive) regulat
Power Electronics :: 05.02.2013 11:32 :: Tahmid :: Replies: 5 :: Views: 354