Bygge switchmode, for varm FET

On 19/07/14 20.23, Ulrik Smed wrote:
















Hej Ulrik

Det kan (sjovt nok) skyldes flere ting:






arbejdscyklen.

SMPS using UC3842 - And related problems [hvis du overvejer xx3842 skal  

http://www.sonsivri.to/forum/index.php?topic49%329.0
Citat: "...
Mosfet heat is result of normaly two things,
1 on resistance of mosfet
2. insufficient drive volt.
..."

UCC 3800/1/2/3/4/5 BiCMOS CURRENT MODE CONTROL ICs:
http://www.ti.com/lit/an/slua149/slua149.pdf

Differences Between the UCC3813 and UCC3800 PWM Families:
http://www.ti.com/lit/an/slua247/slua247.pdf
Citat: "...The UCC3813 family is a lower-cost version of the UCC3800  
family of industry standard PWM controllers..."

Andre varianter som er ringere end ucc380x-familien er:
UCC38C43
MIC38HC43-1

Does a MOSFET need a gate resistor?:
http://www.electro-tech-online.com/threads/does-a-mosfet-need-a-gate-resistor.87419/
Citat: "...
A gate resistor limits the instantaneous current that is drawn when the  
FET is turned on. If you are driving a FET directly from a low-current  
device (microcontroller or logic gate) then gate resistors are  
recommended. Anywhere from 5 to 100 ohms is fine. They also can be  
viewed as slew-rate limiting devices for the gate signal, or as devices  
to eliminate ringing at the gate.

If you are driving the FET from something like a dedicated half bridge  
driver or similar then they can be eliminated, the drivers are usually  
meant to be directly connected to the FET.
..."

-



Design Tips:
https://web.archive.org/web/20070611173502/http://www.ridleyengineering.com/tips.html

Switching-Mode Power Supply Design Problem List:
http://www.smpstech.com/problems.htm


http://www.smpstech.com/tmos0000.htm

Se afsnit 3.1.2 pdf-side 8-9:
http://www.infineon.com/dgdl/Infineon+-+Application+Note+-+Discrete+IGBT+-+TRENCHSTOP+SMPS.pdf?folderId=db3a30433a047ba0013a69f8f64c0705&fileId=db3a304342e8be2c014309ec86002133

Glenn

skal vist lige ha' en lille basis-kollektor kondensator. :-)

PWM'en er en trekantgenerator lavet over en TL074 og en  
transistorcomparator.

On Sat, 19 Jul 2014 20:23:35 +0200, Ulrik Smed wrote:













/CFO

'bootstrappe' sig til en negativ off puls.

Hej Ulrik


sci.electronics.design

Glenn

On 19/07/14 21.47, Glenn wrote:




PS:



* Knalddygtige folk



hinanden idioter.

* Trolls

* resten...

Nu er du advaret...

Glenn

On 19/07/14 20.23, Ulrik Smed wrote:





??:

TO-5/PKG SILICON NPN TRANSISTOR 40-VOLT 2.0-AMP 7.0-WATT
http://www.leadelectronics.com/product-details.php?item_no=2SC2196&manu_no=FUJI&catid19%

solcellernes plus (3 celler i serie, 180V ind, loaded). Der brugte jeg nogle  

On 20/07/14 08.56, Ulrik Smed wrote:
...
















in stock

packaging (alt andet end reel) fx:
bulk
Cut tape
tray
tube

Valgt min. Vds 500V og op.

Valgt fra min til max. ca 200mOhm

Valgt C input fra min til max. ca 1300 pF


36 fund

http://www.digikey.dk/product-detail/en/STP24N60M2/497-13556-5-ND/3881001
Citat: "...
600V
18A (Tc)
Gate Charge (Qg) @ Vgs 29nC @ 10V
Input Capacitance (Ciss) @ Vds 1060pF @ 100V
..."


http://www.st.com/web/en/resource/technical/document/datasheet/DM00070788.pdf
Citat: "...
These devices are N-channel Power MOSFETs developed using a new  
generation of MDmeshTM technology: MDmesh II PlusTM low Qg. These  
revolutionary Power MOSFETs associate a vertical structure to the  
company's strip layout to yield one of the world's lowest on-resistance  
and gate charge. They are therefore suitable for the most demanding high  
efficiency converters.
...

Crss  2,2pF
..."

Jeg fandt fx:

http://www.digikey.dk/product-detail/en/STP24N60M2/497-13556-5-ND/3881001

PS: Det var ikke den billigste, men det var fra et firma jeg kendte.

-

Den "billigste" var:

AOTF29S50L:
http://www.digikey.dk/product-detail/en/AOTF29S50L/785-1444-5-ND/3603392

-

En anden:



STF31N65M5:
http://www.digikey.dk/product-detail/en/STF31N65M5/497-13101-5-ND/3474312

-

Dioder



http://www.digikey.dk/product-search/en/discrete-semiconductor-products/diodes-rectifiers-single/1376383

in stock

packaging (alt andet end reel) fx:
bulk
Cut tape
tray
tube




Voltage fx
600-1200V


Current fx
5-10A


66 fund

sorter efter pris (unit price)


PS: Du ved hvis du har sorteret forkert, da den dyreste koster ca.  
4000kr :-)

Den billigste koster:

13kr
Silicon Carbide Schottky
1200V (1.2kV)
5.9A
No Recovery Time > 500mA (Io) [!]
Reverse Recovery Time (trr) 0ns
http://www.digikey.dk/product-detail/en/C4D02120A/C4D02120A-ND/2679410
Datablad:
http://www.cree.com/~/media/Files/Cree/Power/Data%20Sheets/C4D02120A.pdf
Citat: "...
Features
* 1.2kV Schottky Rectifier
* Zero Reverse Recovery Current
* High-Frequency Operation
* Temperature-Independent Switching
* Extremely Fast Switching

Benefits
* Replace Bipolar with Unipolar Rectifiers
* Essentially No Switching Losses
* Higher Efficiency
* Reduction of Heat Sink Requirements
* Parallel Devices Without Thermal Runaway
..."













-





SiC MOSFETs (SiCFET):
http://www.digikey.dk/product-search/en/discrete-semiconductor-products/fets-single/1376381?k=sic&stock=1
(lidt falske med)



Der er 16 fund.



Et lille stykke nede er der en med 156mOhm og 650V:

SCT2120AFC:
http://www.digikey.dk/product-detail/en/SCT2120AFC/SCT2120AFC-ND/4171679
650V
29A (Tc)
156 mOhm @ 10A, 18V
61nC @ 18V
1200pF @ 500V

Datablad findes via google:
http://www.rohm.com/web/global/products/-/product/SCT2120AF
http://rohmfs.rohm.com/en/products/databook/datasheet/discrete/sic/mosfet/sct2120af.pdf
"...
Crss 13pF ved 200V+
..."

Hvorfor SiC?:


Sep 1, 2007 Reduce Circuit Zapping From Cosmic Radiation:
http://powerelectronics.com/power_semiconductors/power_mosfets/circuit-zapping-cosmic-radiation-0907/
http://powerelectronics.com/site-files/powerelectronics.com/files/archive/powerelectronics.com/mag/709PET21.pdf
Citat: "...
About 90% of high-energy particles at ground level are neutrons.
...
For example, the wide bandgap of silicon carbide makes it much more  
radiation hardened than conventional silicon. Diodes are also less  
susceptible to SEB than MOSFETs and IGBTs, but they are still susceptible.
...
Like semiconductor technology, the applied voltage stress has a  
significant effect on the SEB failure rate. Increasing the applied  
voltage greatly increases the probability of SEB failures. Conversely,  
decreasing the applied voltage greatly increases reliability, as will be  
shown.
..."

-

Omtale:

Jun. 19, 2013, SiC MOSFETs Enable Next-Generation Solar Inverters
http://powerelectronics.com/products/sic-mosfets-enable-next-generation-solar-inverters
High-Temperature 1200 V/10 A SiC MOSFET
http://powerelectronics.com/discrete-power-semis/high-temperature-1200-v10-sic-mosfet

-



Jul. 3, 2013, eGaN FET ? Silicon Power Shoot Out: A Retrospective
When a new technology is introduced, it is not reasonable to think that  
engineers will intuitively know how to effectively and efficiently take  
advantage of the performance enhancements that the new technology offers  
? there is always a learning curve. This is being borne out in the case  
of the rapidly emerging technology of high performance gallium nitride  
transistors.
http://powerelectronics.com/gan-transistors/egan-fet-silicon-power-shoot-out-retrospective?page=1

-

May 1, 2007 A New Way to Model Current-Mode Control
http://powerelectronics.com/power_management/pwm_controllers/model-current-mode-control-0507/
http://powerelectronics.com/power_management/pwm_controllers/705PET20.pdf
"...
This article aims to demystify current-mode control, and cut through the  
myths and misconceptions of its operation.
..."
Jun 1, 2007 A New Way to Model Current-Mode Control
http://powerelectronics.com/mag/model-current-mode-control-0607/
http://powerelectronics.com/mag/706PET21.pdf

Aug 1, 2007 Stacked-Ceramic Caps Brave High Temperatures
http://powerelectronics.com/passive_components_packaging_interconnects/capacitors/stacked-ceramic-caps-smps-0807/
http://powerelectronics.com/passive_components_packaging_interconnects/capacitors/708PET24.pdf
X9U, X8R

Glenn

Mere om SiC:


Sep 1, 2008 Silicon Carbide MOSFETs Challenge IGBTs
http://powerelectronics.com/power_semiconductors/power_mosfets/silicon_carbide_mosfets_igbt-809/
Citat: "...
SiC also offers a substantially reduced on-resistance variation over its  

range of 20%, compared with 200% to 300% for Si. The SiC MOSFET die is  


plastic package.
..."
http://powerelectronics.com/power_semiconductors/power_mosfets/809PET-silicon-carbide-MOSFETs-IGBT.pdf




25 August, 2004, BBC News: Door open for silicon replacement:
http://news.bbc.co.uk/2/hi/science/nature/3598836.stm
Citat: "...
Previous research has already shown that even at red-hot temperatures as  
high as 650C (1,202F), silicon carbide devices can function unperturbed  
and without the need for cooling.
...
One exciting application for silicon carbide could be in deep-space  
missions, where nuclear power would be needed for the craft.  
Radiation-hardened silicon carbide devices would reduce the shielding  
needed to protect reactor control electronics
..."


Oct 28, 2011, powerelectronics.com: SiC ?Super? Junction Transistors  
Deliver High Temp Performance:
http://powerelectronics.com/power_semiconductors/sic/sic-super-junction-transistors-high-temp-performance-1111/
Citat: "...
GeneSiC?s SiC-based 1200 V/220 m? Super Junction Transistors (SJTs)  

switching transitions (< 15 ns)
...



..."

-
-

Supplerende om smps generelt:

Jul 1, 2008, No Heatsink Needed for 200-W Buck-Boost Supply:
http://powerelectronics.com/power_management/pwm_controllers/no_heatsink_200-w_buck_supply/
http://powerelectronics.com/power_management/pwm_controllers/807PET07-no-heatsink-buck-boost-supply.pdf

Glenn

fra gamle PC-forsyninger jeg bruger til det her. :-) Det er bare et  
legeprojekt til mine have-solceller, ikke noget kommercielt.

Ulrik Smed skriver:











Klaus

On 19/07/14 20.23, Ulrik Smed wrote:

...


Cuk-konverter topologien i stedet?:

https://da.wikipedia.org/wiki/Cuk-konverter



http://www.boostbuck.com/IsolationoftheCukConverter.html

http://www.boostbuck.com/HistoricalPerspective.html
Citat: "...The point is that many topologies can be more or less made to  
work for a given application! What is weird but true is that the  
boostbuck (Cuk) converter works better than all the rest!..."
http://www.boostbuck.com/
http://www.boostbuck.com/BypassingaCapacitor.html
http://www.boostbuck.com/WhenNottoDesignWiththeBoostbuckFamilyofCo.html



kommercielt).

-

ANALYSIS OF SNUBBING METHODS FOR ISOLATED CUK CONVERTER USED IN ...
http://homepage.mac.com/rbarline/.cv/rbarline/Public/Snubbing%20Methods.pdf-link.pdf

Dr. Slobodan Cuk
Power Electronics Group, California Institute of Technology
http://web.archive.org/web/20010808074149/www.cco.caltech.edu/~peg/cuk.html
http://www.cco.caltech.edu/~peg/links.html

-
-





Feb 1, 2008 Bridgeless PFC Boosts Low-Line Efficiency
http://powerelectronics.com/power_management/power_ics/bridgeless-pfc-low-line-efficiency-0225/
http://powerelectronics.com/site-files/powerelectronics.com/files/archive/powerelectronics.com/mag/802PET20.pdf

Dr. Slobodan Cuk:

Del 1:
Jul 1, 2010, True Bridgeless PFC Converter Achieves Over 98% Efficiency,  
0.999 Power Factor:
http://powerelectronics.com/power-management/true-bridgeless-pfc-converter-achieves-over-98-efficiency-0999-power-factor

Del 2:
Aug 1, 2010, True Bridgeless PFC Converter Achieves Over 98% Efficiency,  
0.999 Power Factor: Part 2:
http://powerelectronics.com/regulators/true-bridgeless-pfc-converter-achieves-over-98-efficiency-0999-power-factor-part-2
http://powerelectronics.com/site-files/powerelectronics.com/files/archive/powerelectronics.com/images/DesignFeature_BridgelessPC.pdf

VIP - med diagram:
Del 3:
Oct 1, 2010, Single-Stage Isolated Bridgeless PFC Converter Achieves  
Over 98% Efficiency, 0.999 Power Factor:
http://powerelectronics.com/regulators/single-stage-isolated-bridgeless-pfc-converter-achieves-over-98-efficiency-0999-power-f-0
http://powerelectronics.com/site-files/powerelectronics.com/files/archive/powerelectronics.com/images/SingleStagePFCconverter.pdf

-

http://www.google.dk/search?q=RB-IGBT

Application Characteristics of an Experimental RB-IGBT (Reverse Blocking  
IGBT) Module:
http://www.pwrx.com/pwrx/app/04ias42p4.PDF

A High Efficiency Indirect Matrix Converter Utilizing RB-IGBTs:
http://www.pes.ee.ethz.ch/uploads/tx_ethpublications/friedli_PESC06.pdf


Glenn

Det er jo bare en chargepump med udglatningsspoler. ;-)

Jeg har haft lidt lyst til at lave en buck/boost med 2 FET'er og en spole.  

On 20/07/14 22.13, Ulrik Smed wrote:









Hej Ulrik


in-line kommunikation.


energi begge veje.

-





MAC250-230??:
GWL/Power Solar Micro Inverter Grid-tied [linken siger GridFree???]  
DC/AC 230V, 230W CE, Involar MAC250A
Art.#: GF-MAC230A
http://www.ev-power.eu/Micro-Inverters-1/GridFree-Micro-AC-Direct-Invertor-DC-AC-230V-230W-CE.html

GridFree MicroInverters
http://www.ev-power.eu/GridFree-Inverters/
GWL/Power Solar Micro Inverter Grid-tied DC/AC 230V, 230W CE, Involar  
MAC250A
Art.#: GF-MAC230A
http://www.ev-power.eu/GridFree-Inverters/GridFree-Micro-AC-Direct-Invertor-DC-AC-230V-230W-CE.html

Positivliste over godkendte vekselrettere for brug til ... - Energinet.dk:
http://energinet.dk/SiteCollectionDocuments/Danske%20dokumenter/El/Positivliste_over_godkendte_vekselrettere_for_brug_til_solcelleanl%C3%A6g_i_Danmark.pdf
Citat: "...
Only in plant with central protection unit in front of it
..."

Glenn

godt lige hive 50-60 watt mere ud af cellerne, hvis jeg kan. :-)

On 19-07-2014 20:23, Ulrik Smed wrote:

















mit bud at din gate driver er for svag.


en samlet gate ladning af 85nC. Det vil sige for at flytte de 85nC i  

Kan den det?


Hilsen
Klaus