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LLC Resonant Converter

Overview
Documentation
Tools and Software
HW Evaluation Tools
Solutions
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

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.

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      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

      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

All Hardware Evaluation Tools

    • Part Number
      Description
      Core product
      Tool Type
      Supplier
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      EVL-SRK2001-HVS

      Active

      Evaluation board for SRK2001 adaptive synchronous rectification controller for LLC resonant converter with high voltage external sensing MOSFETs

      SRK2001 PSU and Converter Solution Eval Boards -
      EVL-SRK2001-HVS
      Active

      Evaluation board for SRK2001 adaptive synchronous rectification controller for LLC resonant converter with high voltage external sensing MOSFETs

      EVLCMB1-90WADP

      Active

      19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller

      STCMB1 PSU and Converter Solution Eval Boards -
      EVLCMB1-90WADP
      Active

      19 V - 90 W adapter based on the STCMB1, TM PFC and HB LLC combo controller

      EVLCMB1-AIO210W

      Active

      12 V - 210 W adapter based on STCMB1, combo TM PFC and HB LLC

      STCMB1 PSU and Converter Solution Eval Boards -
      EVLCMB1-AIO210W
      Active

      12 V - 210 W adapter based on STCMB1, combo TM PFC and HB LLC

      EVLSTNRG-170W

      Active

      170W SMPS with digitally controlled PFC and resonant LLC stage using STNRG388A

      STNRG388A PSU and Converter Solution Eval Boards -
      EVLSTNRG-170W
      Active

      170W SMPS with digitally controlled PFC and resonant LLC stage using STNRG388A

      EVLSTNRG011-150

      Active

      12 V, 150 W power supply based on STNRG011 digital combo and SRK2001 adaptive synchronous rectifier controller

      STNRG011 PSU and Converter Solution Eval Boards ST
      EVLSTNRG011-150
      Active

      12 V, 150 W power supply based on STNRG011 digital combo and SRK2001 adaptive synchronous rectifier controller

      STEVAL-DPSLLCK1

      Active

      3 kW Full Bridge LLC resonant digital power supply evaluation kit

      - PSU and Converter Solution Eval Boards ST
      STEVAL-DPSLLCK1
      Active

      3 kW Full Bridge LLC resonant digital power supply evaluation kit

      STEVAL-ISA132V1

      Active

      300 W peak power (170 W continuous power) LLC resonant converter based on L6699, STB13N60M2 and STPS20M80CG

      L6699 PSU and Converter Solution Eval Boards ST
      STEVAL-ISA132V1
      Active

      300 W peak power (170 W continuous power) LLC resonant converter based on L6699, STB13N60M2 and STPS20M80CG

      STEVAL-ISA138V1

      Active

      19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699

      L6699 PSU and Converter Solution Eval Boards -
      STEVAL-ISA138V1
      Active

      19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699

      STEVAL-ISA147V3

      Active

      500 W fully digital AC-DC power supply (D-SMPS) based on STM32F334C8 microcontroller

      STM32F334C8 PSU and Converter Solution Eval Boards ST
      STEVAL-ISA147V3
      Active

      500 W fully digital AC-DC power supply (D-SMPS) based on STM32F334C8 microcontroller

      STEVAL-ISA148V1

      Active

      19 V - 90 W adapter with PFC for laptop computers based on L6563H and L6599A

      L6599A PSU and Converter Solution Eval Boards -
      STEVAL-ISA148V1
      Active

      19 V - 90 W adapter with PFC for laptop computers based on L6563H and L6599A

      STEVAL-ISA165V1

      Active

      Evaluation board: SRK2001 adaptive synchronous rectification controller for LLC resonant converters with STP120N4F6

      SRK2001 PSU and Converter Solution Eval Boards ST
      STEVAL-ISA165V1
      Active

      Evaluation board: SRK2001 adaptive synchronous rectification controller for LLC resonant converters with STP120N4F6

      STEVAL-ISA170V1

      Active

      12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001

      L6563H PSU and Converter Solution Eval Boards ST
      STEVAL-ISA170V1
      Active

      12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001

      STEVAL-PCC020V2

      Active

      Interface board USB to I2C/UART to be used with STNRG digital power controller products (STNRG01x and STone)

      STM32F373C8 PSU and Converter Solution Eval Boards ST
      STEVAL-PCC020V2
      Active

      Interface board USB to I2C/UART to be used with STNRG digital power controller products (STNRG01x and STone)