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Ir2110 proteus library sg3525 proteus library ir2104 proteus library uc3843 proteus library ir2153 proteus library tlp250 proteus library tl494 proteus library smps proteus library smps pwm proteus isis library models. You will learn how to proteus 8 professional all library download from our website.thanks. Jul 13, 2019 - build Switching Mode Power Supply (SMPS) with Half Bridge (HB) topology, with Power Factor Correction (PFC Boost Converter) controller with chip NCP1653 SMD SO-8. PWM Control Circuit using SG3525 and MOSFET driver using IC IR2110. This SMPS can produce output power up to 2200 Watt (peak) Load test at 8 Ohm. Output SMPS 90VDC Symmetrical.

Control-Integrated circuit for SMPS SG3525: Pulse frequency modulation and pulse width modulation are two types of techniques used in control integrated circuits for switch-mode power supplies. In Pulse frequency modulation technique on time of pulse remains constant but the frequency increases with the increase in load. But the Pulse frequency modulation technique causes some issues in switch-mode power supplies. On the other hand in Pulse width modulation technique frequency remains constant but the width of pulse changes with the change in load. The width of the pulse or on time increase with the increase in load. Pulse width modulation also resolves the issues which occur in Pulse frequency modulation. Therefore, Pulse width modulation is a preferred technique for control circuits of switch-mode power supplies.

Types of PWM controllers

There are many PWM ( Pulse width modulation ) controller integrated circuits available in the market just like SG3525. These PWM controllers ICs you can use very easily in your SMPS projects by connecting some external circuitry with them according to the selection of frequency. I will discuss these things in detail later in this article. There are two types of PWM controller integrated circuits:

• Voltage control PWM controller
• current control PWM controller

The voltage control method used a feedback voltage by comparing it with a reference value to set a duty cycle of PWM. In return to control the output voltage of SMPS. While the current control method uses Output current from output inductor to compare it with the reference value and to set the duty cycle of PWM. I have used a voltage mode PWM controller in pure sine wave inverter. Sg3525 is used in Dc to DC converter part to control the output voltage and for switching of MOSFETS connected to push-pull converter chopper.

Introduction to SG3525

• It is a pulse width modulation controller IC which has 16 pins.
• It provides two pulse width modulator signal which is a complement of each other.
• It is used to generate a PWM signal for power electronics projects and also for switch-mode power supplies.
• It offers feedback circuitry to control the output voltage by comparing the feedback signal with a reference voltage.
• It has a protection circuitry that shutdown the PWM signal based on the feedback current limit.

SG3525 pinout diagram

This is a pin configuration diagram and the functionality of each pin is provided in the next section.

Features of SG3525

• It can operate with a supply voltage of between 8 and 35 volts. It may damage above 40 volts.
• It also has an external oscillator synchronization pin.
• It has a pulse to pulse shutdown capability.
• It can operate with a frequency range of 100 to 400KHz.
• It also provides a feature of versatile dead-time control between switching signals to turn on or off devices like MOSFETs, IGBTS and power transistors.
• The maximum power dissipation is about 1000mW.
• Other similar integrated circuits are SG2525, UC3525.
• For further features and specifications check datasheet.

How and Where to use SG3525

• Sg3525 is a voltage mode PWM controller integrated circuit. It is used in maximum inverters available in the market.
• Even top inverters manufacture companies also use Sg3525 in dc to dc converter part of the inverter. It is a 16 pin integrated circuit.
• It has two PWM outputs both are an inversion of each. Another advantage of SG3525 is that it has a built-in totem pole base PWM driver.
• If you want to know about the internal architecture of SG3535. Search its datasheet.
• Output pins can driver semiconductor devices up to a current range of 50mA. For example, if you are using a switch that requires more than 50mA to operate, then you will have to use driver IC as MOSFET driver IR2110.
• The description and functionality of each pin are given in the next section on the pinout of sg3525.

Working with the functionality of each pin

The above diagram shows the pin configuration of SG3525. Description of each pin is given below:

• Pin 1 is an inverting pin and pins 2 is a noninverting pin. If the voltage on the inverting pin is greater than the voltage on the non-inverting pin, the duty cycle increases and if the voltage on the non-inverting pin is greater than the inverting pin, the duty cycle decreases. So you can use one pin for feedback through the voltage divider and one pin for the setting of a reference voltage.
• pin 3 is used for the synchronization of two waves.
• pin 4 is the output of an oscillator.
• pin 5, 6 and 7 is used to set the frequency of PWM. Frequency can be calculated by using the following formula:

f= 1 / CT (.7 * RT+ 3 * discharge)

By adjusting the values of CT capacitor, RT resistor, and discharge resistor. you can adjust the frequency of PWM.

• Pin 8 SS is used for soft starting for enabling output after some time. Greater the value of capacitance connected to pin 8, greater the soft-start time.
• pin 9 is a compensation pin used with feedback to avoid rapid fluctuations in output voltage with the change in load or input voltage.
• Pin 10 is shut down pin. IF shut down pin = 0 it will work and if shut down pin = 1 means connected with 5 volts it will remain in shut down mode.
• Pins 11 and 14 are output pins. These pins provide input to MOSFETs and as I have already mentioned, there is no need to connect any Mosfet driver because sg3525 has a built-in MOSFET driver circuit.
• Pin 13 and 15 are power pins. Vc should be between 5-35 volt and Vin should be between 8-35 volt.
• Pin 16 is a reference pin and it is used to set reference voltage through pin 1 or 2. It can also be used to give 5 volts to shut down the pin in case you want to shut down sg3525 through a push-button.

Example Circuit diagram SG3524

Circuit diagrams of example below show the circuit diagram of sg3525 which generates two inverted PWM signals. Users can adjust the width of PWM using a variable resistor shown in the feedback circuit. You can change the variable resistor value to adjust the resolution of PWM.

• In the above circuit diagram feedback from the output is used to get regulated voltage.
• It is discussed in detail in Dc to dc converter using a push-pull topology part.

Inverter Circuit diagram Example

In this second example, this PWM controller IC is used to generate a 220 volt AC supply from 12 volts dc. This circuit is based on SG3525A which is the same IC. Two Mosfets and ferrite core transformer are used in push-pull configuration mode. This example circuit provides power regulated voltage output with the help of the feedback circuit. Variables resistor R10 provide voltage regulation feature.

SG3525 Applications

• It is used for power electronics applications like pure sine wave inverters.
• It is used to generate regulated voltage for dc to dc convert circuits like a buck converter, boost convert, cuk converter, and many others.

Other articles of pure sine wave inverter.

Fn Belgian Mauser Serial Numbers

Mauser rifles began to come in from a number of. Looks like the FN Mauser picture on the wikipedia file under fn mauser 3006. In fact the Belgian Army used a Mauser 98 of Belgian. The serial number on. May 17, 2014 Help Identifying FN made Mauser Sporter. Are below the wood and only states that it is an FN made in Belgium with the date code and a serial number. Feb 18, 2013 FN Mauser question. Other Belgian company manufacturing FN actions in. Manufacture based on serial number please post a link. Unmarked FN Commercial.

A friend of mine inherited this FN Bolt action rifle in 7x57mm Mauser, and I haven't been able to identify a model or what the value is. He is looking into selling it since he has a few other bolt guns and this rifle doesnt have any sentimental value. He is not technically inclined so I am looking into this for him. Pictures are below and there is a closeup of the only markings on the rifle. ANy help would be awesome, thanks. Ok, this is what I could find. The Lion over PV means the rifle was rated as a smokeless powder rifle (a good indication that it was manufactured around the time rifles were being converted from blackpowder to smokeless).

The Crown over the R means the barrel had a rifled bore. The crown on the oval with ELG inside was a proof mark denoting it was manufactured in Liege, Beligum. FN is another proof mark denoting it was manufactured by FN-Herstal. Then finally the 7x57 is the caliber. I, as of yet, am unable to determine what the arrow means. It is most likely a proof mark of some kind, but there are just too many references to arrows on rifles to really find anything online, same goes for the X (what exactly is above the X, it's too hard to determine with the pictures).

It appears to be a Model 1895 Mauser rifle. I read on a website that FN had been contracted to manufacture rifles for the Belgium Army before the turn of the 20th century. After the contract was filled, they started to make rifles for the Germans on a model that was very similar (almost identical) to the Spanish M96 Mausers. Also, at this time there was limited production of commercial rifles made of the same variety. I have heard that many manufacturers only serialized military firearms (to keep count of their contract) and the extra tooling was not use don commercial rifles. In what I have found, I would say that this could possibly be a early to mid 20th century FN action either model 1895 or 1889 mauser of commercial origins (most likely the 95). Outside of that, I can't offer much more other than what I have already posted.

Hope that helps some. ETA: I had no prior knowledge of these firearms prior to doing some online hunting.

Some of my facts could be wrong as I am tkaing bits and pieces from many different places. I have no idea what a 1895 Mauser looks like, but what I have read it would seem by the markings and the similar look to the Spanish M96 that it would be a M95 Mauser. I may be completely off though. If it were a military rifle sporter conversion, it would either have been re-barreled, or have the original military barrel. The one pictured does not have a stepped barrel, and the receiver is not clip slotted, and there is no thumb cut on the left side of the receiver. Judging by the pictures (if they're accurate), if the proof marks are still in the white as they appear to be, it would mean that it's not refinished. Sutonnymj keyboard layout pdf.

The pictures from a distance also look like it's got a deep blue polish. The bolt is definitely a 98.

I would guess that this is a FN Mauser Commercial variant of some sort, most likely post-ww2. Then again, I could be totally wrong. Rogers Powertone Snare Serial Numbers. Lmao Is there a crest or anything on top of the receiver near the barrel? I'm with xeno..

The bolt is definitely a 98. You can tell by the extractor claw and the shape of its rear end.

It has the m95 style trigger guard with one screw at the front tho. No stripper clip guide leads me to believe it was a commercial action, most likely 50s/60s.

There's no way the safety works on that rifle. Not that you would need it tho. I bid 150:cool: j/k it's worth a lot more than that - can you give us the details on the scope? And honestly, if I inherited a gun that nice I would keep it unless I was totally broke. A commercial FN in 7x57.. Ahh I'm droolin here. Would sure look nice next to my 95 chilean.

Judging by the pictures (if they're accurate) Is there a crest or anything on top of the receiver near the barrel? I took those pictures tonight of the rifle in it's current condition. The mark above the X appears to either be a very small capital A or a carrot mark as PanzerAce noted. The only other text on the barrel and receiver reads 'Made in Belgium' on the right, and 'Chrome Vanadium Steel' on the left. The serial number is on the barrel, the receiver, and the bolt handle and is the same throughout. No other marks at all on the rifle except for a PV Lion mark on the bolt handle.

No rear sight, just the front, and the optic is a Herter's (no model or any numbers) in I believe 4X magnification with a basic thin crosshair, and some made in Japan rings. The stock is a synthetic textured Bell and Carlson with a Pachmayr pad, unknown if original. The barrel floats above the stock about halfway to the front scope mount.

Funny thing is the rifle is in like new condition despite being so old sounding, only the bolt face shows evidence of repeated firings. The safety works, but only if the scope is removed, and I can't seem to removed the bolt in order to clean it without going through the muzzle.

With that rear sight and the stepped barrel, it's almost surely a military rifle. As for what type (model) of Mauser it is, you need to post up photos of the bolt.

98's have three lugs, two up front, and one in the rear. Earlier models have only two lugs.

That will help narrow things down. Also, you can remove the action from the stock and find the markings underneath the wood. To remove all doubt about what it is, you would need to have all the proofmarks and serial numbers to give someone. Lots of stuff under that stock. With the good close up of the receiver, we can finally see that it is for sure a small ring Mauser (not a 98).

You can pull the bolt and you'll find two lugs, and no third lug on the rear of the bolt. Some of these have been converted to other calibers, but it's not really worth it. Leave it as is, shoot 7mm Mauser out of it once in a while, and forget about trying to make money on it. Many Mauser rifles are worth tons of money, but those rifles are generally civilian sporters done up by Rigby, Gibbs, or one of many very fine German gunsmiths.

Check out the current issue of Rifle magazine, it's all about the Mauser brand. There is also a thread right now on this forum where a guy has posted up photos of an early Mauser sporter that might be worth some money. There are some military rifles that are worth money, but those are usually Oberndorf (German made) Mausers, and not contract pieces. Sorry to rain on your parade, but the rifle is worth keeping for it's own sake, not because of any value motive. It's a good rifle.

It's a piece of history. IMPORTANT DISCLAIMER Although The High Road has attempted to provide accurate information on the forum, The High Road assumes no responsibility for the accuracy of the information. All information is provided 'as is' with all faults without warranty of any kind, either express or implied.