Push Pull Converter Pspice Student

Pete Millett's DIY Audio pages

DN-45 UC3846, UC3856 and UCC3806 Push Pull PWM Current Mode Control ICs: Sep. 05, 1999: Application note: DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode: Sep. 05, 1999: Application note: Modeling, Analysis and Compensation of the Current-Mode Converter: Sep. 05, 1999: Application note: U-93 A New Integrated Circuit for.
Although all the configurations of the push-pull amplifier can technically be called push-pull amplifier, only the Class B amplifier is the actual push-pull amplifier. In contrast to Class A amplifier, Class B amplifier has two transistors for the push-pull electrical action of which one is NPN and the other is PNP.
PowerEsim is free SMPS power supply design, manufacturer & product database/list, switching converter topologies, circuit analysis, magnetic design software, transformer/inductor simulation & calculation software, DVT, Differential mode EMI simulation, EMI measurement, Harmonics, Thermal, MTBF, Life time and Monte Carlo analysis tool.

For technical books, tube data, vintage data, transformer data, and McIntosh data, go to:www.tubebooks.org

Last update: 3/9/21 - Posted a 4D32 SE UL amp

4/9/19 - Added a Nutube balanced (differential) amp for headpohone or line amp use

PLEASE READ - Commercial usage of information on this site:

Typical waveforms, and derivation of M(D) = V/V g! Flyback transformer design considerations! Voltage clamp snubber Derivation of the flyback converter The flyback converter is based on the buck-boost converter. Its derivation is illustrated in Fig. Figure 1(a) depicts the basic buck-boost converter, with the switch realized using a. A push-pull converter has two transformer primary windings, which is impossible to have a LLC link inserted in the primary side. Converter in 13 shows soft switching behavior of the push-pull circuit with a LC resonant link in secondary side. But further research in 14 shows that there exists N-period resonant status in this type.

I consider all the information that I post here to be in the public domain. So, you can use it however you want, for commercial or non-commercial use.

That said, I would appreciate it if you at least let me know if you are going to use any of the circuits or especially PCB Gerber files to make commercial products, or to sell bare PCB's.

There are some cases where products are being sold not only with my permission, but active involvement. The 'Millett Hybrid' effort and others at HeadFi are examples (and excellent models of how the DIY community should work, in my opinion). There are other cases where I have asked vendors to sell PCB's as a service to hobbyists. And there are other cases where companies are manufacturing and selling PCB's, chassis, etc. without contacting me at all.

In ALL of these cases, I make no profit from any of the sales. Zero, zip, nada. I have a normal 'day job' that pays the bills, this is strictly a hobby with me. So please do not expect me to provide the level of technical support that you might expect when buying a product. I try and help, but it sometimes takes me days - even weeks if I'm traveling for work - to respond.

Thanks for your indulgence in reading this!

All that said... I do sell things, including projects I no longer need, PC boards for my designs, and occasionally parts and tubes. I do this through eBay - I maintain an eBay store 'pmillett'. You can click here to see what I may be selling at the moment.

This is a depository for various audio designs and projects - mostly tube - that I've put in the public domain, as well as additional info to support magazine articles that I've written, and an ever-growing amount of technical data archives relating to vintage and tube audio. I'm constantly adding and updating things, so come back every once in a while and see what's new. Remember: you may have to hit the 'refresh ' button to see the updated versions of pages!

Follow the links below for detailed info.... Most pictures are hyper-linked to full-size pictures, so you can zoom in if you click on them.

If you have questions please feel free to e-mail me at:

Please, if you send me e-mail, make sure that there is a logical 'subject', or your mail will get dumped along with all the junk mail (spam) that I get - it's up to about 100 junk e-mails per day now. If I don't respond within a few days, try again, just in case I missed your message. I try and return everybody's mail within a week, though I travel quite a lot for work and find I get very behind at times. Please be patient...

Standard disclaimer: This info is provided with no guarantees as to accuracy, usefulness, etc. There's no guarantee that if you try and build anything like this stuff that you won't electrocute yourself, the kids, or your cat, or burn your house down... especially if you don't know what you're doing. Be careful!

Many files on this site, especially scanned documentation, are in Adobe Acrobat (PDF) format. I recommend that if you don't already have it you download the latest version of Adobe reader. Some files have compressed images that may not work correctly with older versions of Acrobat reader.

Scanned vintage books, manuals, catalogs, papers...

Please go to www.tubebooks.org for this material.

Audio projects and experiments:

Power amps

The 'NuclassD' 50W class-D hybrid amp using the nutube

A hybrid (SS driver) class A2 DHT amp

A 50 watt monoblock version of the 'Engineer's Amp'

A PL177 single-ended amplifier

'La Luxuriante' stereo R120 SE amp

'Fatboy', a low-distortion zero-feedback push-pull 300B amp

A compactron triple-triode driver for push-pull amps

'Mr. Potatohead' 815 amp - 50W from 2 tubes in class AB2

The '807' Push-Pull amp using driver boards below

Push-pull driver PCB, a (nearly) universal driver for push-pull amps

'Jonokuchi', a single-ended tube headphone / speaker amp

Class-A2 1636 amp using a power opamp driver

The 'Engineer's Amplifier', an affordable, high-performance push-pull TV pentode amp

The 'Unnecessarily Complex 300B Amplifier' (from audioXpress 2009)

'The Mighty Midget' (from audioXpress 5/08)

'A Single-Ended E-Linear Amp' (from audioXpress 4/05)

813 single-ended triode amp with microprocessor-controlled power supply

Preamps / Line Stages

A Nutbe Balanced Amp - a true diferential amp for line stage or headphone amp use

A buffer PCB using the Korg Nutube 6P1 low-voltage DHT

'el escorpion', a simple line stage in a cigar box that runs off of 12VDC

A solid-state LR phono preamp (no caps in the EQ) from ETF.13

A high-end Tube Microphone Preamp

'A Low-mu preamp' (from AudioXpress 2/04)

Headphone Amps

The NuHybrid headphone amp, a hybrid headphone amp using the Korg Nutube

The DIY 'Butte' solid-state headphone amp

'Jonokuchi', a single-ended tube headphone / speaker amp

Low-voltage tube hybrid headphone amp - the original 'Millett Hybrid' amp (from AudioXpress 11/02)

Test equipment

Abreakout board for banana cables

An audio dummy load

A 'Sound Card Interface / AC RMS Voltmeter' you can build

Software for the HP 8903 audio analyzer - Make professional plots from this affordable audio test system!

Other stuff

DC Power supply board used with the NuclassD or class AB power amps (look down the page)

Opamp power supply (used with the LR Phono, look down the page)

Voltage selector PCB for transformers like the Hammond 300-series with multi-voltage primaries

A power supply PCB for B+ supplies using the Tentlabs MEC Mini Electronic Choke

A linear 'USB adapter', a 5W power supply

A power (AC) sequencing board for big amplifiers

A 10W B+ flyback supply (switching power supply) that runs off of low-voltage DC (5-20V)

Muting relay PCB to eliminate the 'thumps'

A two-channel shunt-regulated adjustable bias supply

High-voltage regulator ('Maida' regulator) that fits Landfall Systems heatsink

Tube amp power supply PCB with bias supply

An isolated current sensor board to measure plate current using a PanelPilot meter

MOSFET follower buffer for class-A2 grid drive

an Opamp experimenter board

Speaker projects:

Downloadable drawings for 'An Affordable Full-Range Speaker Project', AudioXpress 6/03 (uses Fostex FE-164)

Glass Audio and AudioXpress articles:

audioXpress has been gracious enough to allow me to reproduce here some of the articles that I've written for Glass Audio and AudioXpress magazines in their entirety:

'A Low-Mu triode Preamp' (1.3MB PDF file) from AudioXpress 02/04

'Build A Low-Voltage Tube Hybrid Headphone/Line Amp' (612kB PDF file) from AudioXpress 11/02 - the original 'Millett Hybrid'.

'Power Transformers For Audio Equipment' (1.3MB PDF file) from AudioXpress 6/01

'All About Wire' (476kB PDF file) from AudioXpress 8/01

'The Power Line Interface' (1.3MB PDF file) from Glass Audio 6/00

Miscellaneous technical information:

'LR Phono Preamps' presentation from ETF.13 (PDF or PPT)

Where to get stuff - an assorted list of some of my suppliers

Tektronix power transformer information - Info I've collected on classic tube-type Tektronix power transformers

ResCalc, a cool utility program you can download that calculates combinations of standard resistors to get a particular value.

Parts shopping in Asia (sorry, getting a bit out of date)

Other non-audio stuff:

A picture collection of interesting old QSL cards that I received in the early 1970's.

Who I am:

A lifetime electronics geek, I got a ham radio license at the age of 8 and a first-class commercial radio license at 14. I'm just old enough that I actually build and used tube some stuff when it was still in production. I've been an electrical engineer for nearly thirty years, doing mostly computer and consumer electronics design work. I owned and operated Wheatfield Audio, which made tube headphone amps (but no money!) for a few years. I also have written articles for AudioXpress magazine (formerly Glass Audio) on occasion.

I do some commercial audio design work outside of my 'day job'. Some of my work includes the Apex Hi-Fi product line, which is sold by TTVJ (Todd the Vinyl Junkie).

I'm currently living near Fort Collins, Colorado, and work for a Silicon Valley semiconductor company.

These are the Wheatfield Audio HA-1 and HA-2 tube headphone amps, which I designed a long time ago:

I've put some info from the old Wheatfield Audio web site here that might be useful, especially if you own an HA-1 or HA-2.

Advantages of Push Pull converter | disadvantages of Push Pull converter

This page covers advantages and disadvantages of Push Pull DC-DC converter, its Circuit and working operation.It mentions benefits or advantages of Push Pull converter and drawbacks or disadvantages of Push Pull converter.

What is Push Pull converter?

About DC to DC converter:
A dc-dc converter is electronic circuit. The main function of this circuitis to modify one potential difference(i.e. voltage) level to the another potential difference level.It is basically a voltage regulator consisting of switches, inductor and capacitor for power conversion.There are numerous applications of DC-DC converter.

DC-DC converters are divided into following types based on isolation between input and output circuits.• Isolated DC-DC converter and Non-isolated DC-DC converter
Isolated DC-DC converters are further divided into following sub types.
• Fly-back• Forward• Half bridge• Full bridge• Push Pull

About Push Pull converter circuit working operation:
The figure depicts Push Pull converter circuit. It is a converter circuit that uses push type and pull type device. Push-Pull is a term associated with two switches where each switch is connected to positive or negative leg of the DC power supply. Push-Pull is a DC/DC chopper that is very widespread by reason of more that is calculated by power lost at the terminals of push-pull device.

Features of Push pull converter:
• Push-pull converter grades in easy and compact gating requisite. It has merely two devices in the first section with supply of common ground.
• Push-pull converters make a reduced amount of sound on line as input, have steady input I and are more in higher energy approaches.
• HF transformer separation with the converter is favored to acquire more steps up ratio and the galvanic separation between utility and modules.
• Voltage fed schemes, employs noticeably outsized electrolytic capacitor too curb the big input I ripple leading to large volumes, more priced and concise duration of PV system.
• Current-fed schemes demonstrate subsequent advantages compared to voltage-fed topologies: 1) lesser input I ripple 2) minor turns-ratio of transformer 3) output capacitive filter 4) nil imbalance problem of flux.
• Current-fed chopper suffers from elevated peaks in voltage crossways the switches during switch off. Passive RCD snubber is employed to take up the spike in voltage owing to less efficiency. A non-dissipative snubber is planned to recycle the absorbed power, this amplifies the complexity.
• Active clamping is popularly used due to high efficiency and achieves ZVZCS of the devices at the same time
• To lessen the quantity of the transformer turns ratio and switches voltage doubler is chosen.

Benefits or advantages of Push Pull converter

Following are the benefits or advantages of Push Pull converter:
➨ To drive MOSFETs push pull does not necessitate an isolated power supply
➨ Peak current sensing is required so that the core does not drift into saturation.
➨ Push-Pull is used for freeway access latch release cables and security break cables.
➨ 7V nineteen cables are extremely flexible, making them ideal for pull assemblies.
➨ The Push pull converter is of low cost.
➨ Transformer rating required is smaller than the forward converter.

Drawbacks or disadvantages of Push Pull converter

Following are the drawbacks or disadvantages of Push Pull converter:
➨Push pull uses two switches which are not widely used in flux walking phenomena.
➨Central tap transformer is used is one of the main disadvantages.

Conclusion: In order to understand advantages of Push Pull converter and disadvantages of Push Pull converter one has to understand Push Pull converter basics.

Advantages and Disadvantages of other wireless technologies