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PS ZVS FB Converter

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In a phase-shifting, zero voltage switching full-bridge converter, the two legs of the full-bridge are switched with two square waves whose phase shift is modulated by the converter’s control loop and the resulting square wave is fed into the primary of the transforms that provides primary-secondary isolation and voltage scaling. Parasitic resonance between the capacitance of the transistors and the transformer’s leakage inductance is exploited to ensure a soft turn-on – ideally zero voltage switching (ZVS) - for all four switches in the primary. To also extend the ZVS range at light loads, a resonance inductor is introduced in series with the primary winding of the transformer.

Advantages of ZVS

ZVS helps reduce switching losses and stress in addition to removing the need for primary snubbers. It also enables higher switching frequencies which helps in the design of converters with higher efficiency and power density, making this converter well suited for high-power (> 600 W), high-frequency applications.

Our products and solutions

ST offers a range of advanced digital controllers, rectifiers and power MOSFETs with improved reverse recovery time of their intrinsic diode. Our 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 enable developers to fully exploit the benefits of full-bridge phase-shift ZVS converters.

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Application Notes (5 of 19)

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AN1768 ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES
1.1 01 Apr 2022
01 Apr 2022
AN1768 ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES 1.1
AN4656 Bootloading procedure for STLUX™ and STNRG™ digital controllers
3.1 29 Mar 2022
29 Mar 2022
AN4656 Bootloading procedure for STLUX™ and STNRG™ digital controllers 3.1
AN2025 CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION
1.1 02 Aug 2022
02 Aug 2022
AN2025 CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION 1.1
AN604 Calculation of conduction losses in a power rectifier
3.2 13 Dec 2022
13 Dec 2022
AN604 Calculation of conduction losses in a power rectifier 3.2
AN4021 Calculation of reverse losses in a power diode
1.0 13 Dec 2022
13 Dec 2022
AN4021 Calculation of reverse losses in a power diode 1.0
AN5028 Calculation of turn-off power losses generated by a ultrafast diode
1.0 18 Jul 2022
18 Jul 2022
AN5028 Calculation of turn-off power losses generated by a ultrafast diode 1.0
AN4381 Current sharing in parallel diodes
1.0 13 Dec 2022
13 Dec 2022
AN4381 Current sharing in parallel diodes 1.0
AN5844 EVLVIPGAN50FL: 15 V/50 W isolated flyback with VIPERGAN50
1.0 05 Dec 2022
05 Dec 2022
AN5844 EVLVIPGAN50FL: 15 V/50 W isolated flyback with VIPERGAN50 1.0
AN5910 EVLVIPGAN65PD – 65W USB PD adaptor reference design with VIPERGAN65
1.0 10 Feb 2023
10 Feb 2023
AN5910 EVLVIPGAN65PD – 65W USB PD adaptor reference design with VIPERGAN65 1.0
AN2626 MOSFET body diode recovery mechanism in a phase-shifted ZVS full bridge DC/DC converter
1.4 13 Sep 2018
13 Sep 2018
AN2626 MOSFET body diode recovery mechanism in a phase-shifted ZVS full bridge DC/DC converter 1.4
AN1453 NEW FAMILY OF 150V POWER SCHOTTKY
1.1 13 Dec 2022
13 Dec 2022
AN1453 NEW FAMILY OF 150V POWER SCHOTTKY 1.1
AN5917 PCB design optimization for maximizing thermal dissipation in MasterGaN family
1.0 22 Feb 2023
22 Feb 2023
AN5917 PCB design optimization for maximizing thermal dissipation in MasterGaN family 1.0
AN5046 Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages
4.0 06 Feb 2023
06 Feb 2023
AN5046 Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages 4.0
AN5088 Rectifiers thermal management, handling and mounting recommendations
2.0 13 Dec 2022
13 Dec 2022
AN5088 Rectifiers thermal management, handling and mounting recommendations 2.0
AN533 SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting
3.6 13 Dec 2022
13 Dec 2022
AN533 SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting 3.6
AN443 SERIES OPERATION ON FAST RECTIFIERS
2.1 13 Dec 2022
13 Dec 2022
AN443 SERIES OPERATION ON FAST RECTIFIERS 2.1
AN4856 STEVAL-ISA172V2: 2 kW fully digital AC - DC power supply (D-SMPS) evaluation board
1.0 19 Mar 2021
19 Mar 2021
AN4856 STEVAL-ISA172V2: 2 kW fully digital AC - DC power supply (D-SMPS) evaluation board 1.0
AN1542 THE THERMAL RUNAWAY LAW IN SCHOTTKY USED IN OR-ING APPLICATION
1.1 10 Oct 2022
10 Oct 2022
AN1542 THE THERMAL RUNAWAY LAW IN SCHOTTKY USED IN OR-ING APPLICATION 1.1
AN869 Tj max limit of Schottky diodes
2.2 13 Dec 2022
13 Dec 2022
AN869 Tj max limit of Schottky diodes 2.2
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Technical Notes & Articles (1)

Resource title
Version
Latest update
TA0363 3 V input, 70 V output, fully integrated hybrid charge pump
1.0 24 Mar 2023
24 Mar 2023
TA0363 3 V input, 70 V output, fully integrated hybrid charge pump 1.0

Flyers (2)

Resource title
Version
Latest update
1200 V SiC diodes, 2 to 40 a in surface-mount and through-hole packages
1.0 21 Jul 2020
21 Jul 2020
1200 V SiC diodes, 2 to 40 a in surface-mount and through-hole packages 1.0
ST Diodes Finder : the new app for Android and iOS
2.0 07 Nov 2022
07 Nov 2022
ST Diodes Finder : the new app for Android and iOS 2.0

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      ST Voltage Regulator Finder

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      		 Finder Apps ST
      ST Voltage Regulator Finder

      Description:

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      STPOWER MOSFET Finder

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      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

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      STEVAL-ISA172V2
      Active

      2 kW fully digital AC-DC power supply (D-SMPS) evaluation board

      		 STM32F334C8 PSU and Converter Solution Eval Boards ST
      STEVAL-ISA172V2
      Active

      2 kW fully digital AC-DC power supply (D-SMPS) evaluation board
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