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AC-DC power supply units used in servers and telecom infrastructures are required to provide an increased level of efficiency and improved power factor to meet requirements such as the gold, platinum or titanium levels of the 80 PLUS voluntary certification program in addition to enhanced reliability for continuous operation or use in redundant systems. To meet these challenging performance targets, architectures implementing advanced control algorithms are built with high-performance digital controllers.

To help design high-efficiency power supply units (PSU) with high power density, ST offers a range of power MOSFET and rectifiers – including those based on silicon carbide (SiC) – and advanced analog and digital controllers. In addition, developers will benefit from 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 including reference designs.

Part Number
Description
STEVAL-DPSLLCK1 3 kW Full Bridge LLC resonant digital power supply evaluation kit Quick view

Key Features

  • Power ratings:
    • input DC voltage: 375 V to 425 V
    • output voltage: 48 V
    • maximum output current: 62.5 A
    • output power: 3 kW
    • peak efficiency: 95.3%
    • HF transformer isolation voltage: 4 kV
  • Resonant and switching frequencies:
    • max DC-DC switching frequency: 380 kHz (at startup)
    • closed loop switching frequency: 120 kHz to 250 kHz
    • resonant frequency: 175 kHz
  • Protection mechanisms:
    • undervoltage and overvoltage protection on input and output
    • overtemperature protection
    • short-circuit protection
    • forced cooling with air flow speed modulation according to the output power and temperature
  • Efficiency:
    • adaptive synchronous rectification
    • light load burst mode
  • Digital control with STM32F334 microcontroller

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STEVAL-DPSTPFC1 3.6 kW PFC totem pole with inrush current limiter reference design using TN3050H-12WY and SCTW35N65G2V Quick view

Key Features

  • 97.5 % efficiency at full load
  • Max. 5 % THD at 10 % of full load
  • Compact PFC converter
  • Higher switching lifetime
  • Compliant with EMI norms at 4kV
  • RoHS compliant
  • WEEE compliant

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STEVAL-EFUSE01 Evaluation board based on the STEF01 fully programmable universal electronic fuse Quick view

Key Features

  • Input voltage from 8 to 48 V
  • Peak output current up to 6 A
  • Enable/Disable/Fault flag pin
  • Adjustable undervoltage lockout
  • Adjustable output voltage clamp
  • Programmable VOUT slew rate control
  • Latch or auto-retry jumper-programmable thermal protection
  • Power good monitoring flag
  • Drives an optional external reverse current protection MOSFET
  • CE certified
  • RoHS and China RoHS compliant
  • WEEE compliant (2012/19/UE RAEE II)

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STEVAL-ISF003V1 Low standby losses power front-end with inrush current-limitation Quick view

Key Features

  • Fully electronic solution without the need for an inrush current limiter resistor and its bulky bypass electromechanical relay
  • DC bus disconnection at standby to reduce losses below 0.3 W
  • Inrush current compliance with IEC61000-3-3
  • Operation allowed with PFC (continuous or discontinuous)
  • Compliant with EN 55015, IEC 61000-4-11
  • Criteria A at 4 kV IEC 61000-4-5 and at 4 kV IEC 61000-4-4
  • RoHS compliant

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STEVAL-SCR001V1 Inrush current solution with bypass SCR Quick view

Key Features

  • Two high-temperature thyristors (SCR) in D²PAK package to bypass the inrush resistor
  • Compact SMD solution: 26 x 26 mm (≈ 1 sq. in)
  • Simple drive circuit: 2 low voltage transistors and 7 resistors (no MCU)
  • Requires an unregulated power supply (12 V typ.; created from a secondary winding)
  • Compatible with PFC and fly-back converter
  • Suitable for applications from 50 W up to 800 W (230 VRMS , TAMB  = 60 °C)
  • Input voltage range: 90-265 VAC , 50/60 Hz
  • Robust and immune (2 kV IEC 61000-4-5, 2.5 kV IEC 61000-4-4) and low EMI noise (EN55014) solution
  • RoHS compliant

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EVLSTNRG-1KW 1 kW SMPS digitally controlled multi-phase interleaved converter using STNRG388A Quick view

Key Features

  • Digital controller: STNRG388A
  • 3-phase interleaved DC/DC architecture
  • Full load power: 1000 W (scalable up to 3 kW)
  • Efficiency: more than 94% from 10% to full load
  • Peak efficiency: 96.5% at full load
  • Stand-by consumption: 425 mW
  • Input voltage range: 350 ÷ 420 V dc
  • CC/CV output regulation
  • Output voltage regulation: 133 V
  • Output current regulation: 7.5 A
  • Maximum output current for each phase: 2.5 A
  • Modular power and control board

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STEVAL-ISA147V3 500 W fully digital AC-DC power supply (D-SMPS) based on STM32F334C8 microcontroller Quick view

Key Features

  • Input AC voltage: 90 V to 264 V
  • Input AC frequency: 45 Hz to 65 Hz
  • Nominal power: 500 W
  • Output voltage: 12 V
  • Semi-Bridgeless PFC stage
  • DC-DC stage: resonant LLC with synchronous rectification
  • Peak efficiency: 94%
  • PFC switching frequency: 60 kHz
  • DC-DC switching frequency: 80 kHz to 115 kHz (burst mode above)
  • HF transformer isolation voltage: 4 kV
  • Cooling: natural convection up to 300 W, forced cooling above 300 W
  • PFC control: managed by STM32F051K8
  • LLC control: managed by STM32F334C8
  • Input short-circuit protection
  • Input under/overvoltage protection
  • Input under/overfrequency protection
  • DC Bus under/overvoltage protection
  • Output short-circuit protection
  • Output under/overvoltage protection
  • Overtemperature protection
  • RoHS compliant

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STEVAL-ISA172V2 2 kW fully digital AC-DC power supply (D-SMPS) evaluation board Quick view

Key Features

  • Input AC voltage: 90 V to 264 V
  • Output voltage: 48 V or 52 V, Max output current: 42 A
  • Input AC frequency: 45 Hz to 65 Hz
  • Nominal output power: 2 kW
  • Interleaved PFC stage
  • PFC switching frequency: 60 kHz
  • PFC Average current mode control
  • Cycle by cycle PFC current control
  • Maximum power factor: 0.99
  • DC-DC stage: full-bridge phase-shifted ZVS with synchronous rectification
  • DC-DC switching frequency: 100 kHz
  • Overall efficiency: 80 PLUS Platinum level
  • HF transformer isolation voltage: 4 kV
  • Forced cooling with air flow speed modulation according to the output power
  • Over-temperature protection
  • Output short-circuit protection
  • PFC control & DC-DC control: managed by STM32F334C8
  • PFC power stage based on MDmesh M2 Power MOSFETs and SiC Diodes
  • DC-DC power stage based on MDmesh DM2 Power MOSFETs
  • Synchronous rectification based on STripFET Power MOSFETs
  • Active clamp circuit based on MDmesh DM2 Power MOSFETs
  • EMC filter for noise reduction
  • RoHS compliant

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STEVAL-IPFC01V1 3 kW three-channel interleaved PFC based on the STNRGPF01 digital controller Quick view

Key Features

  • The 3 kW interleaved PFC evaluation kit features:
    • STEVAL-IPFC01P1 power board
    • STEVAL-IPFC01C1 control board
    • STEVAL-IPFC01A1 adapter board
  • Input voltage range: 90 to 265 VAC
  • Line frequency range: 47 to 63 Hz
  • Maximum output power: 3 kW at 230 V
  • Output voltage: 400 V
  • Power factor: > 0.98 at 20% load
  • Total Harmonic Distortion: <5% at 20% load
  • Mixed-signal average current mode control, CCM fixed frequency operation
  • Switching Frequency: 111 kHz
  • Cycle-by-cycle regulation (analog current control loop)
  • Input voltage and load feed-forwards
  • Phase shedding
  • Burst-mode operation
  • Overvoltage protection
  • Thermal protection
  • Status indicator LEDs
  • Inrush current limiter function
  • Cooling function

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Schematics BOM Gerber
EVL400W-ADP/ATX 12V - 400W SMPS for Adapter, Desktop and AIO using L4984D, L6699 and SRK2000A Quick view

Key Features

  • Universal input mains voltage range: from 90 Vac to 264 Vac - frequency from 45 to 65 Hz
  • Output voltage: 12 V ± 2% at 33 A continuous operation
  • Overall efficiency at full load: above 87% according to ENERGY STAR® 6.1 for computers and compliant with 80PLUS Gold Level
  • Average efficiency: > 89%, according to European CoC ver. 5 Tier 2 for external power supplies
  • No load mains consumption: < 0.15 W at 230 Vac, according to European CoC ver. 5 Tier 2 for external power supplies
  • Light-load efficiency: European CoC ver. 5 Tier 2 requirements for external power supplies and EuP lot 6 Tier 2 for office equipment (Pin < 500 mW for Pout = 250 mW at 115 Vac and 230 Vac)
  • Mains harmonics: meets EN61000-3-2 Class-D and JEITA-MITI Class-D
  • EMI: according to EN55022 Class-B
  • Safety: meets EN60950 standards
  • RoHS compliant

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Schematics BOM Gerber
Part Number
STEVAL-DPSLLCK1

3 kW Full Bridge LLC resonant digital power supply evaluation kit

Key Features

  • Power ratings:
    • input DC voltage: 375 V to 425 V
    • output voltage: 48 V
    • maximum output current: 62.5 A
    • output power: 3 kW
    • peak efficiency: 95.3%
    • HF transformer isolation voltage: 4 kV
  • Resonant and switching frequencies:
    • max DC-DC switching frequency: 380 kHz (at startup)
    • closed loop switching frequency: 120 kHz to 250 kHz
    • resonant frequency: 175 kHz
  • Protection mechanisms:
    • undervoltage and overvoltage protection on input and output
    • overtemperature protection
    • short-circuit protection
    • forced cooling with air flow speed modulation according to the output power and temperature
  • Efficiency:
    • adaptive synchronous rectification
    • light load burst mode
  • Digital control with STM32F334 microcontroller

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-DPSTPFC1

3.6 kW PFC totem pole with inrush current limiter reference design using TN3050H-12WY and SCTW35N65G2V

Key Features

  • 97.5 % efficiency at full load
  • Max. 5 % THD at 10 % of full load
  • Compact PFC converter
  • Higher switching lifetime
  • Compliant with EMI norms at 4kV
  • RoHS compliant
  • WEEE compliant

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STEVAL-EFUSE01

Evaluation board based on the STEF01 fully programmable universal electronic fuse

Key Features

  • Input voltage from 8 to 48 V
  • Peak output current up to 6 A
  • Enable/Disable/Fault flag pin
  • Adjustable undervoltage lockout
  • Adjustable output voltage clamp
  • Programmable VOUT slew rate control
  • Latch or auto-retry jumper-programmable thermal protection
  • Power good monitoring flag
  • Drives an optional external reverse current protection MOSFET
  • CE certified
  • RoHS and China RoHS compliant
  • WEEE compliant (2012/19/UE RAEE II)

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-ISF003V1

Low standby losses power front-end with inrush current-limitation

Key Features

  • Fully electronic solution without the need for an inrush current limiter resistor and its bulky bypass electromechanical relay
  • DC bus disconnection at standby to reduce losses below 0.3 W
  • Inrush current compliance with IEC61000-3-3
  • Operation allowed with PFC (continuous or discontinuous)
  • Compliant with EN 55015, IEC 61000-4-11
  • Criteria A at 4 kV IEC 61000-4-5 and at 4 kV IEC 61000-4-4
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-SCR001V1

Inrush current solution with bypass SCR

Key Features

  • Two high-temperature thyristors (SCR) in D²PAK package to bypass the inrush resistor
  • Compact SMD solution: 26 x 26 mm (≈ 1 sq. in)
  • Simple drive circuit: 2 low voltage transistors and 7 resistors (no MCU)
  • Requires an unregulated power supply (12 V typ.; created from a secondary winding)
  • Compatible with PFC and fly-back converter
  • Suitable for applications from 50 W up to 800 W (230 VRMS , TAMB  = 60 °C)
  • Input voltage range: 90-265 VAC , 50/60 Hz
  • Robust and immune (2 kV IEC 61000-4-5, 2.5 kV IEC 61000-4-4) and low EMI noise (EN55014) solution
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
EVLSTNRG-1KW

1 kW SMPS digitally controlled multi-phase interleaved converter using STNRG388A

Key Features

  • Digital controller: STNRG388A
  • 3-phase interleaved DC/DC architecture
  • Full load power: 1000 W (scalable up to 3 kW)
  • Efficiency: more than 94% from 10% to full load
  • Peak efficiency: 96.5% at full load
  • Stand-by consumption: 425 mW
  • Input voltage range: 350 ÷ 420 V dc
  • CC/CV output regulation
  • Output voltage regulation: 133 V
  • Output current regulation: 7.5 A
  • Maximum output current for each phase: 2.5 A
  • Modular power and control board

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FEATURED RESOURCES

BOM
STEVAL-ISA147V3

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

Key Features

  • Input AC voltage: 90 V to 264 V
  • Input AC frequency: 45 Hz to 65 Hz
  • Nominal power: 500 W
  • Output voltage: 12 V
  • Semi-Bridgeless PFC stage
  • DC-DC stage: resonant LLC with synchronous rectification
  • Peak efficiency: 94%
  • PFC switching frequency: 60 kHz
  • DC-DC switching frequency: 80 kHz to 115 kHz (burst mode above)
  • HF transformer isolation voltage: 4 kV
  • Cooling: natural convection up to 300 W, forced cooling above 300 W
  • PFC control: managed by STM32F051K8
  • LLC control: managed by STM32F334C8
  • Input short-circuit protection
  • Input under/overvoltage protection
  • Input under/overfrequency protection
  • DC Bus under/overvoltage protection
  • Output short-circuit protection
  • Output under/overvoltage protection
  • Overtemperature protection
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-ISA172V2

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

Key Features

  • Input AC voltage: 90 V to 264 V
  • Output voltage: 48 V or 52 V, Max output current: 42 A
  • Input AC frequency: 45 Hz to 65 Hz
  • Nominal output power: 2 kW
  • Interleaved PFC stage
  • PFC switching frequency: 60 kHz
  • PFC Average current mode control
  • Cycle by cycle PFC current control
  • Maximum power factor: 0.99
  • DC-DC stage: full-bridge phase-shifted ZVS with synchronous rectification
  • DC-DC switching frequency: 100 kHz
  • Overall efficiency: 80 PLUS Platinum level
  • HF transformer isolation voltage: 4 kV
  • Forced cooling with air flow speed modulation according to the output power
  • Over-temperature protection
  • Output short-circuit protection
  • PFC control & DC-DC control: managed by STM32F334C8
  • PFC power stage based on MDmesh M2 Power MOSFETs and SiC Diodes
  • DC-DC power stage based on MDmesh DM2 Power MOSFETs
  • Synchronous rectification based on STripFET Power MOSFETs
  • Active clamp circuit based on MDmesh DM2 Power MOSFETs
  • EMC filter for noise reduction
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-IPFC01V1

3 kW three-channel interleaved PFC based on the STNRGPF01 digital controller

Key Features

  • The 3 kW interleaved PFC evaluation kit features:
    • STEVAL-IPFC01P1 power board
    • STEVAL-IPFC01C1 control board
    • STEVAL-IPFC01A1 adapter board
  • Input voltage range: 90 to 265 VAC
  • Line frequency range: 47 to 63 Hz
  • Maximum output power: 3 kW at 230 V
  • Output voltage: 400 V
  • Power factor: > 0.98 at 20% load
  • Total Harmonic Distortion: <5% at 20% load
  • Mixed-signal average current mode control, CCM fixed frequency operation
  • Switching Frequency: 111 kHz
  • Cycle-by-cycle regulation (analog current control loop)
  • Input voltage and load feed-forwards
  • Phase shedding
  • Burst-mode operation
  • Overvoltage protection
  • Thermal protection
  • Status indicator LEDs
  • Inrush current limiter function
  • Cooling function

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FEATURED RESOURCES

Schematics BOM Gerber
EVL400W-ADP/ATX

12V - 400W SMPS for Adapter, Desktop and AIO using L4984D, L6699 and SRK2000A

Key Features

  • Universal input mains voltage range: from 90 Vac to 264 Vac - frequency from 45 to 65 Hz
  • Output voltage: 12 V ± 2% at 33 A continuous operation
  • Overall efficiency at full load: above 87% according to ENERGY STAR® 6.1 for computers and compliant with 80PLUS Gold Level
  • Average efficiency: > 89%, according to European CoC ver. 5 Tier 2 for external power supplies
  • No load mains consumption: < 0.15 W at 230 Vac, according to European CoC ver. 5 Tier 2 for external power supplies
  • Light-load efficiency: European CoC ver. 5 Tier 2 requirements for external power supplies and EuP lot 6 Tier 2 for office equipment (Pin < 500 mW for Pout = 250 mW at 115 Vac and 230 Vac)
  • Mains harmonics: meets EN61000-3-2 Class-D and JEITA-MITI Class-D
  • EMI: according to EN55022 Class-B
  • Safety: meets EN60950 standards
  • RoHS compliant

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Schematics BOM Gerber
00 Files selected for download

Technical Documentation

    • Description Version Size Action
      AN4930
      500 W fully digital AC-DC power supply (D-SMPS) evaluation board
      1.0
      8.73 MB
      PDF
      AN2644
      An introduction to LLC resonant half-bridge converter
      2.0
      1.27 MB
      PDF
      AN4656
      Bootloading procedure for STLUX™ and STNRG™ digital controllers
      2.0
      635.41 KB
      PDF
      AN4689
      EVLSTNRG-1KW: 1 kW SMPS digitally controlled multiphase interleaved converter using the STNRG388A
      1.1
      5.33 MB
      PDF
      AN4720
      Half bridge resonant LLC converters and primary side MOSFET selection
      1.0
      1.4 MB
      PDF
      AN4606
      Inrush-current limiter circuits (ICL) with Triacs and Thyristors (SCR) and controlled bridge design tips
      2.2
      1,008.92 KB
      PDF
      AN2450
      LLC resonant half-bridge converter design guideline
      6.0
      746.74 KB
      PDF
      AN4406
      MDmesh™ M2: the new ST super-junction technology ideal for resonant topologies
      1.0
      652.78 KB
      PDF
      AN4789
      Monolithic Schottky diode in ST F7 LV MOSFET technology: improving application performance
      1.1
      1,006.7 KB
      PDF
      AN4856
      STEVAL-ISA172V2: 2 kW fully digital AC - DC power supply (D-SMPS) evaluation board
      1.0
      4.25 MB
      PDF
      AN4277
      Using STM32 device PWM shut-down features for motor control and digital power conversion
      4.0
      834.03 KB
      PDF
      AN4930

      500 W fully digital AC-DC power supply (D-SMPS) evaluation board

      AN2644

      An introduction to LLC resonant half-bridge converter

      AN4656

      Bootloading procedure for STLUX™ and STNRG™ digital controllers

      AN4689

      EVLSTNRG-1KW: 1 kW SMPS digitally controlled multiphase interleaved converter using the STNRG388A

      AN4720

      Half bridge resonant LLC converters and primary side MOSFET selection

      AN4606

      Inrush-current limiter circuits (ICL) with Triacs and Thyristors (SCR) and controlled bridge design tips

      AN2450

      LLC resonant half-bridge converter design guideline

      AN4406

      MDmesh™ M2: the new ST super-junction technology ideal for resonant topologies

      AN4789

      Monolithic Schottky diode in ST F7 LV MOSFET technology: improving application performance

      AN4856

      STEVAL-ISA172V2: 2 kW fully digital AC - DC power supply (D-SMPS) evaluation board

      AN4277

      Using STM32 device PWM shut-down features for motor control and digital power conversion

    • Description Version Size Action
      UM2088
      Getting started with the 2 kW fully digital AC-DC power supply (D-SMPS) evaluation board
      1.0
      1.3 MB
      PDF
      UM2064
      Getting started with the 500 W fully digital AC-DC power supply (D-SMPS) evaluation board
      1.0
      1.15 MB
      PDF
      UM2076
      Getting started with the STEVAL-ISF003V1
      2.0
      3.09 MB
      PDF
      UM2088

      Getting started with the 2 kW fully digital AC-DC power supply (D-SMPS) evaluation board

      UM2064

      Getting started with the 500 W fully digital AC-DC power supply (D-SMPS) evaluation board

      UM2076

      Getting started with the STEVAL-ISF003V1

Presentations & Training Material

    • Description Version Size Action
      L6699: Double-ended controller specific to series-resonant half-bridge topology 2.0
      430.88 KB
      PDF
      Power Factor Corrector controllers portfolio
      1.22 MB
      PDF

      L6699: Double-ended controller specific to series-resonant half-bridge topology

      Power Factor Corrector controllers portfolio

Publications and Collaterals

    • Description Version Size Action
      400/650 V MDmesh™ DM2: ST’s new MOSFET series with integrated fast-recovery body diode 1.0
      342.97 KB
      PDF
      500-650 V MDmesh™ M2: The New ST’s High Voltage Super-junction MOSFET Series 1.0
      720.83 KB
      PDF
      Industrial-grade SiC diodes - 650V and low VF - to boost the performance of power converters 2.0
      958.23 KB
      PDF
      ST Diodes Finder : the new app for Android and iOS 2.0
      1.46 MB
      PDF
      STEVAL-IPFC01V1 3 kW three-channel interleaved PFC 1.0
      693.89 KB
      PDF
      STNRGPF01 - Shift into high gear with digital power 11.18
      714.28 KB
      PDF

      400/650 V MDmesh™ DM2: ST’s new MOSFET series with integrated fast-recovery body diode

      500-650 V MDmesh™ M2: The New ST’s High Voltage Super-junction MOSFET Series

      Industrial-grade SiC diodes - 650V and low VF - to boost the performance of power converters

      ST Diodes Finder : the new app for Android and iOS

      STEVAL-IPFC01V1 3 kW three-channel interleaved PFC

      STNRGPF01 - Shift into high gear with digital power

    • Description Version Size Action
      STM32F3 series - Mainstream 32-bit MCUs 17.09
      2.18 MB
      PDF

      STM32F3 series - Mainstream 32-bit MCUs

    • Description Version Size Action
      Digital Controller Eases Design Of Interleaved PFC For Multi-kilowatt Converters by Rosario Attanasio, Giuseppe Di Caro, Sebastiano Messina, and Marco Torrisi, STMicroelectronics, Schaumburg, Ill and Catania, Italy 1.0
      1.96 MB
      PDF

      Digital Controller Eases Design Of Interleaved PFC For Multi-kilowatt Converters by Rosario Attanasio, Giuseppe Di Caro, Sebastiano Messina, and Marco Torrisi, STMicroelectronics, Schaumburg, Ill and Catania, Italy

Development Tools

    • Part Number

      MOSFET product finder application for Android and iOS

      Diode product finder application for Android and iOS

      STM32 and STM8 product finder for mobile devices and desktops

      Linear and switching voltage regulators and voltage reference applications for smartphones and tablets

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Power Management

Part number Description
L4984D CCM PFC CONTROLLER
L6491 High voltage high and low-side 4 A gate driver
L6699 Enhanced high-voltage resonant controller
PM8834 4 A dual low side MOSFET driver
SRK2000A Synchronous rectifier smart driver for LLC resonant converters
SRK2001 Adaptive synchronous rectification controller for LLC resonant converter
STNRG388A Digital controller for power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL
STNRGPF01 Three-channel interleaved CCM PFC digital controller
Part number
CCM PFC CONTROLLER
High voltage high and low-side 4 A gate driver
Enhanced high-voltage resonant controller
4 A dual low side MOSFET driver
Synchronous rectifier smart driver for LLC resonant converters
Adaptive synchronous rectification controller for LLC resonant converter
Digital controller for power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL
Three-channel interleaved CCM PFC digital controller