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. Read more

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.

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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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	Resource title		Latest update
PDF	1200 V SiC diodes, 2 to 40 a in surface-mount and through-hole packages 1.0		18 Mar 2021	18 Mar 2021 1200 V SiC diodes, 2 to 40 a in surface-mount and through-hole packages 1.0
PDF	ST Diodes Finder : the new app for Android and iOS 2.0		18 Mar 2021	18 Mar 2021 ST Diodes Finder : the new app for Android and iOS 2.0

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ST Voltage Regulator Finder	Active	Linear and switching voltage regulators and voltage reference applications for smartphones and tablets	Finders Apps	ST	ST Voltage Regulator Finder Description: Linear and switching voltage regulators and voltage reference applications for smartphones and tablets
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ST MCU Finder	Active	STM32 and STM8 product finder for mobile devices and desktops	STM32 Utilities	ST	ST MCU Finder Description: STM32 and STM8 product finder for mobile devices and desktops

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PDF	AN1768 ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES 1.1	24 Mar 2020	24 Mar 2020 AN1768 ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES 1.1
PDF	AN4656 Bootloading procedure for STLUX™ and STNRG™ digital controllers 3.1	19 Mar 2021	19 Mar 2021 AN4656 Bootloading procedure for STLUX™ and STNRG™ digital controllers 3.1
PDF	AN2025 CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION 1.1	13 Sep 2018	13 Sep 2018 AN2025 CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION 1.1
PDF	AN604 Calculation of conduction losses in a power rectifier 3.2	24 Mar 2021	24 Mar 2021 AN604 Calculation of conduction losses in a power rectifier 3.2
PDF	AN4021 Calculation of reverse losses in a power diode 1.0	24 Mar 2021	24 Mar 2021 AN4021 Calculation of reverse losses in a power diode 1.0
PDF	AN5028 Calculation of turn-off power losses generated by a ultrafast diode 1.0	13 Sep 2018	13 Sep 2018 AN5028 Calculation of turn-off power losses generated by a ultrafast diode 1.0
PDF	AN4381 Current sharing in parallel diodes 1.0	24 Mar 2021	24 Mar 2021 AN4381 Current sharing in parallel diodes 1.0
PDF	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
PDF	AN1453 NEW FAMILY OF 150V POWER SCHOTTKY 1.1	24 Mar 2021	24 Mar 2021 AN1453 NEW FAMILY OF 150V POWER SCHOTTKY 1.1
PDF	AN5046 Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages 4.0	24 Mar 2021	24 Mar 2021 AN5046 Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages 4.0
PDF	AN5088 Rectifiers thermal management, handling and mounting recommendations 2.0	24 Mar 2021	24 Mar 2021 AN5088 Rectifiers thermal management, handling and mounting recommendations 2.0
PDF	AN533 SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting 3.6	24 Mar 2021	24 Mar 2021 AN533 SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting 3.6
PDF	AN443 SERIES OPERATION ON FAST RECTIFIERS 2.1	24 Mar 2021	24 Mar 2021 AN443 SERIES OPERATION ON FAST RECTIFIERS 2.1
PDF	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
PDF	AN1542 THE THERMAL RUNAWAY LAW IN SCHOTTKY USED IN OR-ING APPLICATION 1.1	13 Sep 2018	13 Sep 2018 AN1542 THE THERMAL RUNAWAY LAW IN SCHOTTKY USED IN OR-ING APPLICATION 1.1
PDF	AN869 Tj max limit of Schottky diodes 2.2	24 Mar 2021	24 Mar 2021 AN869 Tj max limit of Schottky diodes 2.2