Two switch forward converter

Please enter your desired search query and search again

In a two-transistor forward the two transistors of the primary are switched on and power is transferred to the secondary winding of the transformer and then to the output capacitor and the load. When switched off, the diodes in the primary clamp the peak voltages seen by the transistors at the input voltage and thus reduce stress at the same time. The two-transistor forward topology is often used in server and telecom switch mode power supplies (SMPS) as a main stage DC-DC converter and in arc-welding equipment. Read more

Interactive Block Diagram

Block Diagram

Sub-system:

Products

Solutions

HW Evaluation Tools

Documentation

Applications

Tools & Software

eDesignSuite

Open full selector

Sort by:

current choice

A-Z
Z-A
Marketing Status
New products first

Datasheet

We've upgraded our block diagrams.

Would you like a guided tour to discover ST's new look?

No, thanks Yes, please.

Select the sub-system here

End the tour Next

Click on each block to learn more about ST's offers.

End the tour Next

Browse our product tree.

End the tour Next

Use the parametric search tool and compare products here.

Finish

This content is not supported on Internet Explorer 11. Please use a more recent browser.

Our products and solutions

To help developers fully exploit the benefits of two-transistors forward converters, ST offers a range of power MOSFETs and rectifiers; high-voltage and galvanically isolated gate drivers; primary PWM and synchronous rectification controllers; as well as high-performance STM32 microcontrollers – with an extended range of dedicated peripherals including high-resolution PWM timers and high-speed ADCs – together with our hardware and software evaluation and development tools as well as reference designs.

Featured Videos

See All

Getting started with STM32F334 for digital power conversion

Build your new power management digital solutions!

Watch the video (5:11)

All resources

	Resource title	Version	Latest update

Presentations (1)

	Resource title	Version	Latest update
PDF	Primary side regulation controllers portfolio		24 Feb 2016	24 Feb 2016 Primary side regulation controllers portfolio

Flyers (1)

	Resource title	Version	Latest update
PDF	Field-Effect Rectifier Diodes Advantageously replace Schottky (60V and 100V)	1.0	28 Feb 2022	28 Feb 2022 Field-Effect Rectifier Diodes Advantageously replace Schottky (60V and 100V) 1.0

All tools & software

Finder Apps

	Part number	Status	Description	Type	Supplier
Worldwide,Asia,Europe,Africa,North America,South America,Oceania,Afghanistan,Bahrain,Bangladesh,Bhutan,Brunei,Burma (Myanmar),Cambodia,China,East Timor,India,Indonesia,Iraq,Japan,Jordan,Kazakhstan,Kuwait,Kyrgyzstan,Laos,Malaysia,Maldives,Mongolia,Nepal,Oman,Pakistan,Philippines,Qatar,Russian Federation,Saudi Arabia,Singapore,South Korea,Sri Lanka,Taiwan,Tajikistan,Thailand,Turkmenistan,United Arab Emirates,Uzbekistan,Vietnam,Yemen,Albania,Andorra,Armenia,Austria,Azerbaijan,Belarus,Belgium,Bosnia and Herzegovina,Bulgaria,Croatia,Cyprus,Czech Republic,Denmark,Estonia,Finland,France,Georgia,Germany,Greece,Hungary,Iceland,Ireland,Israel,Italy,Latvia,Liechtenstein,Lithuania,Luxembourg,Macedonia,Malta,Moldova,Monaco,Montenegro,Netherlands,Norway,Poland,Portugal,Romania,San Marino,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Turkey,Ukraine,United Kingdom,Vatican City,Algeria,Angola,Benin,Botswana,Burkina,Burundi,Cameroon,Cape Verde,Central African Republic,Chad,Comoros,Democratic Republic of Congo,Djibouti,Egypt,Equatorial Guinea,Eritrea,Ethiopia,Gabon,Gambia,Ghana,Guinea,Guinea-Bissau,Ivory Coast,Kenya,Lesotho,Liberia,Libya,Madagascar,Malawi,Mali,Mauritania,Mauritius,Morocco,Mozambique,Namibia,Niger,Nigeria,Rwanda,Sao Tome and Principe,Senegal,Seychelles,Sierra Leone,Somalia,South Africa,Swaziland,Tanzania,Togo,Tunisia,Uganda,Zambia,Zimbabwe,Antigua and Barbuda,Bahamas,Barbados,Belize,Canada,Costa Rica,Dominica,Dominican Republic,El Salvador,Grenada,Guatemala,Haiti,Honduras,Jamaica,Mexico,Nicaragua,Panama,Saint Kitts and Nevis,Saint Lucia,Saint Vincent and the Grenadines,Trinidad and Tobago,United States,Argentina,Bolivia,Brazil,Chile,Colombia,Ecuador,Guyana,Paraguay,Peru,Suriname,Uruguay,Venezuela,Australia,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Zealand,Palau,Papua New Guinea,Samoa,Solomon Islands,Tonga,Tuvalu,Vanuatu	ST Diode Finder	Active	Diode product finder application for Android and iOS	Finder Apps	ST	ST Diode Finder Description: Diode product finder application for Android and iOS
Worldwide,Asia,Europe,Africa,North America,South America,Oceania,Afghanistan,Bahrain,Bangladesh,Bhutan,Brunei,Burma (Myanmar),Cambodia,China,East Timor,India,Indonesia,Iraq,Japan,Jordan,Kazakhstan,Kuwait,Kyrgyzstan,Laos,Malaysia,Maldives,Mongolia,Nepal,Oman,Pakistan,Philippines,Qatar,Russian Federation,Saudi Arabia,Singapore,South Korea,Sri Lanka,Taiwan,Tajikistan,Thailand,Turkmenistan,United Arab Emirates,Uzbekistan,Vietnam,Yemen,Albania,Andorra,Armenia,Austria,Azerbaijan,Belarus,Belgium,Bosnia and Herzegovina,Bulgaria,Croatia,Cyprus,Czech Republic,Denmark,Estonia,Finland,France,Georgia,Germany,Greece,Hungary,Iceland,Ireland,Israel,Italy,Latvia,Liechtenstein,Lithuania,Luxembourg,Macedonia,Malta,Moldova,Monaco,Montenegro,Netherlands,Norway,Poland,Portugal,Romania,San Marino,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Turkey,Ukraine,United Kingdom,Vatican City,Algeria,Angola,Benin,Botswana,Burkina,Burundi,Cameroon,Cape Verde,Central African Republic,Chad,Comoros,Democratic Republic of Congo,Djibouti,Egypt,Equatorial Guinea,Eritrea,Ethiopia,Gabon,Gambia,Ghana,Guinea,Guinea-Bissau,Ivory Coast,Kenya,Lesotho,Liberia,Libya,Madagascar,Malawi,Mali,Mauritania,Mauritius,Morocco,Mozambique,Namibia,Niger,Nigeria,Rwanda,Sao Tome and Principe,Senegal,Seychelles,Sierra Leone,Somalia,South Africa,Swaziland,Tanzania,Togo,Tunisia,Uganda,Zambia,Zimbabwe,Antigua and Barbuda,Bahamas,Barbados,Belize,Canada,Costa Rica,Dominica,Dominican Republic,El Salvador,Grenada,Guatemala,Haiti,Honduras,Jamaica,Mexico,Nicaragua,Panama,Saint Kitts and Nevis,Saint Lucia,Saint Vincent and the Grenadines,Trinidad and Tobago,United States,Argentina,Bolivia,Brazil,Chile,Colombia,Ecuador,Guyana,Paraguay,Peru,Suriname,Uruguay,Venezuela,Australia,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Zealand,Palau,Papua New Guinea,Samoa,Solomon Islands,Tonga,Tuvalu,Vanuatu	ST Voltage Regulator Finder	Active	Linear and switching voltage regulators and voltage reference applications for smartphones and tablets	Finder Apps	ST	ST Voltage Regulator Finder Description: Linear and switching voltage regulators and voltage reference applications for smartphones and tablets
Worldwide,Asia,Europe,Africa,North America,South America,Oceania,Afghanistan,Bahrain,Bangladesh,Bhutan,Brunei,Burma (Myanmar),Cambodia,China,East Timor,India,Indonesia,Iraq,Japan,Jordan,Kazakhstan,Kuwait,Kyrgyzstan,Laos,Malaysia,Maldives,Mongolia,Nepal,Oman,Pakistan,Philippines,Qatar,Russian Federation,Saudi Arabia,Singapore,South Korea,Sri Lanka,Taiwan,Tajikistan,Thailand,Turkmenistan,United Arab Emirates,Uzbekistan,Vietnam,Yemen,Albania,Andorra,Armenia,Austria,Azerbaijan,Belarus,Belgium,Bosnia and Herzegovina,Bulgaria,Croatia,Cyprus,Czech Republic,Denmark,Estonia,Finland,France,Georgia,Germany,Greece,Hungary,Iceland,Ireland,Israel,Italy,Latvia,Liechtenstein,Lithuania,Luxembourg,Macedonia,Malta,Moldova,Monaco,Montenegro,Netherlands,Norway,Poland,Portugal,Romania,San Marino,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Turkey,Ukraine,United Kingdom,Vatican City,Algeria,Angola,Benin,Botswana,Burkina,Burundi,Cameroon,Cape Verde,Central African Republic,Chad,Comoros,Democratic Republic of Congo,Djibouti,Egypt,Equatorial Guinea,Eritrea,Ethiopia,Gabon,Gambia,Ghana,Guinea,Guinea-Bissau,Ivory Coast,Kenya,Lesotho,Liberia,Libya,Madagascar,Malawi,Mali,Mauritania,Mauritius,Morocco,Mozambique,Namibia,Niger,Nigeria,Rwanda,Sao Tome and Principe,Senegal,Seychelles,Sierra Leone,Somalia,South Africa,Swaziland,Tanzania,Togo,Tunisia,Uganda,Zambia,Zimbabwe,Antigua and Barbuda,Bahamas,Barbados,Belize,Canada,Costa Rica,Dominica,Dominican Republic,El Salvador,Grenada,Guatemala,Haiti,Honduras,Jamaica,Mexico,Nicaragua,Panama,Saint Kitts and Nevis,Saint Lucia,Saint Vincent and the Grenadines,Trinidad and Tobago,United States,Argentina,Bolivia,Brazil,Chile,Colombia,Ecuador,Guyana,Paraguay,Peru,Suriname,Uruguay,Venezuela,Australia,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Zealand,Palau,Papua New Guinea,Samoa,Solomon Islands,Tonga,Tuvalu,Vanuatu	STPOWER MOSFET Finder	Active	STPOWER MOSFET finder mobile app for tablets and smartphones	Finder Apps	ST	STPOWER MOSFET Finder Description: STPOWER MOSFET finder mobile app for tablets and smartphones

Part Number	Product Type	Description
FERD20U60DJFD Active	Field effect rectifiers	60 V, 20 A PowerFLAT Ultra-Low Vf Field-Effect Rectifier Diode (FERD)
FERD40H100S Active	Field effect rectifiers	100 V, 40 A Field-Effect Rectifier Diode (FERD)
L5991 Active	PWM controllers	Current Mode PWM
STB5N80K5 Active	MDmesh K5 series	N-channel 800 V, 1.50 Ohm typ., 4 A MDmesh K5 Power MOSFET in a D2PAK package
STF140N6F7 Active	STripFET F7 series	N-channel 60 V, 0.0031 Ohm typ., 70 A STripFET F7 Power MOSFET in a TO-220FP package
STF24N60M2 Active	MDmesh M2 series	N-channel 600 V, 168 mOhm typ., 18 A MDmesh M2 Power MOSFET in TO-220FP package
STGW60H65FB Active	650V HB series - High speed (16 to 60 kHz)	Trench gate field-stop IGBT, HB series 650 V, 60 A high speed
STGWA15H120DF2 Active	1200V H series - High speed (20 to 100 kHz)	Trench gate field-stop IGBT, H series 1200 V, 15 A high speed
STH140N8F7-2 Active	STripFET F7 series	N-channel 80 V, 3.3 mOhm typ., 90 A STripFET F7 Power MOSFET in H2PAK-2 package
STP40N60M2 Active	MDmesh M2 series	N-channel 600 V, 0.078 Ohm typ., 34 A MDmesh M2 Power MOSFET in TO-220 package
STPS10150C Active	Power Schottky High Temperature	150 V, 10 A dual Power Schottky Rectifier
STPSC16H065A Active	Silicon Carbide Diodes	650 V, 16 A Single High Surge Silicon Carbide Power Schottky Diode
STPSC5H12 Active	Silicon Carbide Diodes	1200 V, 5 A High Surge Silicon Carbide Power Schottky Diode
STTH3002C Active	Ultrafast Medium VF and QRR (200V - 400V)	200 V, 30 A dual Ultrafast Diode

Market Status Legend

Two switch forward converter

Interactive Block Diagram

Our products and solutions

Featured Videos

All resources

Presentations (1)

Flyers (1)

All tools & software

Finder Apps

ST Diode Finder

ST Voltage Regulator Finder

STPOWER MOSFET Finder