Search History

Bookmark

Please log in to show your saved searches.

Save to myST

LLC Resonant Converter

Overview

Solutions

HW Evaluation Tools

Documentation

Tools and Software

Key Products

The LLC converter is a resonant inverter with three reactive elements where the DC input voltage is turned into a square wave by a switch network arranged as either a half- or full-bridge to feed the resonant LLC tank that effectively filters out harmonics providing a sinusoidal like voltage and current waveform. This in turn feeds a transformer that provides voltage scaling and primary-secondary isolation. The converter power flow is controlled by modulating the square wave frequency with respect to the tank circuit's resonance. In an LLC resonant converter, all semiconductor switches are soft-switching, or zero-voltage switching (ZVS), at turn-on for the primary MOSFETs and zero-current switching (ZCS) at both turn-on and turn-off for the rectifiers in the secondary; resulting in low electro-magnetic emissions levels (EMI). In addition, it can enable a high degree of integration in the magnetic parts, enabling the design of converters with higher efficiency and power density. Read more

LLC resonant converter half bridge circuit diagram

Resonant Controllers

LLC Synchronous Rectification Controllers

Auxiliary SMPS

40 V to 100 V/STripFET F7 series

40 V to 100 V/STripFET F7 series

40 V to 100 V/STripFET F7 series

40 V to 100 V/STripFET F7 series

40 V to 100 V/STripFET F7 series

40 V to 100 V/STripFET F7 series

Our products and solutions

Our range of power MOSFETs, rectifiers, advanced digital controllers and 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 including reference designs enable developers to fully exploit the benefits of an LLC converter.

Latest from ST

All resources

Expand all categories

	Resource title		Latest update

Application Notes (5 of 32)

Design Notes & Tips (1)

	Resource title		Latest update
PDF	DT0009 Speed up development of the L6699 with the L6599A and flexible PCB layout 1.2		09 Sep 2019	09 Sep 2019 DT0009 Speed up development of the L6699 with the L6599A and flexible PCB layout 1.2

Presentations (3)

	Resource title	Latest update
PDF	EuP Lot 6 Tier2 Ecodesign requirements for Standby	19 Jun 2018	19 Jun 2018 EuP Lot 6 Tier2 Ecodesign requirements for Standby
PDF	L6699: Double-ended controller specific to series-resonant half-bridge topology 2.0	18 Mar 2021	18 Mar 2021 L6699: Double-ended controller specific to series-resonant half-bridge topology 2.0
PDF	Primary side regulation controllers portfolio	21 Jun 2018	21 Jun 2018 Primary side regulation controllers portfolio

Flyers (2)

	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

Selection Guides (1)

	Resource title		Latest update
PDF	Diodes and rectifiers selection guide 2.0		17 Mar 2021	17 Mar 2021 Diodes and rectifiers selection guide 2.0

All tools & software

Finders Apps

Part number	Status	Description	Type	Supplier
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
STPOWER MOSFET Finder	Active	STPOWER MOSFET finder mobile app for tablets and smartphones	Finders Apps	ST	STPOWER MOSFET Finder Description: STPOWER MOSFET finder mobile app for tablets and smartphones

Software Development Tools

Part number	Status	Description	Type	Supplier
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

	Resource title	Latest update
PDF	AN5034 12 V - 210 W converter based on STCMB1, combo TM PFC, HB LLC and SRK2001, adaptive SR controller 2.0	24 Mar 2020	24 Mar 2020 AN5034 12 V - 210 W converter based on STCMB1, combo TM PFC, HB LLC and SRK2001, adaptive SR controller 2.0
PDF	AN5118 12 V – 150 W power supply based on STNRG011 digital combo and SRK2001 adaptive synchronous rectifier controller 1.2	12 Oct 2020	12 Oct 2020 AN5118 12 V – 150 W power supply based on STNRG011 digital combo and SRK2001 adaptive synchronous rectifier controller 1.2
PDF	AN5106 150 V – 150 W LED driver using the STCMB1 transition mode PFC and HBR resonant tank combo controller 3.0	24 Mar 2020	24 Mar 2020 AN5106 150 V – 150 W LED driver using the STCMB1 transition mode PFC and HBR resonant tank combo controller 3.0
PDF	AN3339 185 W power supply with PFC and standby supply for LED TV using the L6564, L6599A, and VIPER27LN 2.0	13 Sep 2018	13 Sep 2018 AN3339 185 W power supply with PFC and standby supply for LED TV using the L6564, L6599A, and VIPER27LN 2.0
PDF	AN5035 19 V - 90 W adapter based on the STCMB1, combo TM PFC and HB LLC 2.0	13 Sep 2018	13 Sep 2018 AN5035 19 V - 90 W adapter based on the STCMB1, combo TM PFC and HB LLC 2.0
PDF	AN4026 19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699 1.3	07 Mar 2019	07 Mar 2019 AN4026 19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699 1.3
PDF	AN3014 19 V, 90 W resonant converter with synchronous rectification using L6563H, L6599A and SRK2000A 3.1	13 Sep 2018	13 Sep 2018 AN3014 19 V, 90 W resonant converter with synchronous rectification using L6563H, L6599A and SRK2000A 3.1
PDF	AN4930 500 W fully digital AC-DC power supply (D-SMPS) evaluation board 1.0	19 Mar 2021	19 Mar 2021 AN4930 500 W fully digital AC-DC power supply (D-SMPS) evaluation board 1.0
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	AN2644 An introduction to LLC resonant half-bridge converter 2.0	19 Mar 2021	19 Mar 2021 AN2644 An introduction to LLC resonant half-bridge converter 2.0
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	AN4381 Current sharing in parallel diodes 1.0	24 Mar 2021	24 Mar 2021 AN4381 Current sharing in parallel diodes 1.0
PDF	AN5264 EVL400W-EUPL7 400W SMPS demonstration board 2.0	24 Mar 2020	24 Mar 2020 AN5264 EVL400W-EUPL7 400W SMPS demonstration board 2.0
PDF	AN4338 EVLSTNRG-170W: 170 W SMPS with digitally controlled PFC and resonant LLC stage based on the STNRG388A 2.0	13 Sep 2018	13 Sep 2018 AN4338 EVLSTNRG-170W: 170 W SMPS with digitally controlled PFC and resonant LLC stage based on the STNRG388A 2.0
PDF	AN4539 HRTIM cookbook 4.0	09 Jan 2020	09 Jan 2020 AN4539 HRTIM cookbook 4.0
PDF	AN4720 Half bridge resonant LLC converters and primary side MOSFET selection 1.0	19 Mar 2021	19 Mar 2021 AN4720 Half bridge resonant LLC converters and primary side MOSFET selection 1.0
PDF	AN5119 How to design an application from draft with STNRG011 1.1	24 Mar 2020	24 Mar 2020 AN5119 How to design an application from draft with STNRG011 1.1
PDF	AN2450 LLC resonant half-bridge converter design guideline 6.0	19 Mar 2021	19 Mar 2021 AN2450 LLC resonant half-bridge converter design guideline 6.0
PDF	AN4406 MDmesh™ M2: the new ST super-junction technology ideal for resonant topologies 1.0	19 Mar 2021	19 Mar 2021 AN4406 MDmesh™ M2: the new ST super-junction technology ideal for resonant topologies 1.0
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	AN4674 SRK2001 adaptive synchronous rectification controller for LLC resonant converter evaluation board family 2.0	13 Sep 2018	13 Sep 2018 AN4674 SRK2001 adaptive synchronous rectification controller for LLC resonant converter evaluation board family 2.0
PDF	AN4599 STEVAL-ISA132V1 24 V 300 W peak power resonant converter 3.0	13 Sep 2018	13 Sep 2018 AN4599 STEVAL-ISA132V1 24 V 300 W peak power resonant converter 3.0
PDF	AN4667 STM32F7 Series system architecture and performance 4.0	13 Sep 2018	13 Sep 2018 AN4667 STM32F7 Series system architecture and performance 4.0
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