Isolated Auxiliary Power Supply up to 20W

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In the power range up to 20W, high-power-density and cost-effective isolated auxiliary power supplies can be designed using single-transistor fly-back, forward or quasi-resonant topologies working at relatively high switching frequencies to minimize transformer and output capacitor size.

We offer a range of integrated – actually a power MOSFET, PWM controller and protection circuit in a single package – high-voltage converters providing extremely low stand-by power, high – 800 and 900V – breakdown voltages and a range of protection features to help maximize efficiency and enhance reliability of power supplies.

In addition, we provide a comprehensive set of hardware and software evaluation and development tools as well as reference designs to enable a fast time to market.

isolated auxiliary power supply up to 20w block diagram

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Application Notes (5 of 32)

Brochures (1)

	Resource title		Latest update
PDF	VIPerPlus - Bring a Plus to your SMPS design 05.2020		14 May 2020	14 May 2020 VIPerPlus - Bring a Plus to your SMPS design 05.2020

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Finders Apps

Part number	Status	Description	Type	Supplier
ST Diode Finder	Active	Diode product finder application for Android and iOS	Finders Apps	ST	ST Diode Finder Description: Diode product finder application for Android and iOS
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

Converter

Converter

DC/DC AC/DC

Input

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

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

Output Power

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

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

	Resource title	Latest update
PDF	AN4685 12 V, 10 W isolated flyback converter based on VIPer25HD 1.0	13 Sep 2018	13 Sep 2018 AN4685 12 V, 10 W isolated flyback converter based on VIPer25HD 1.0
PDF	AN4479 12 V, 15 W peak 20 W isolated flyback converter based on VIPer38LE 1.0	13 Sep 2018	13 Sep 2018 AN4479 12 V, 15 W peak 20 W isolated flyback converter based on VIPer38LE 1.0
PDF	AN4940 12 V, 7.2 W VIPer0P IR remote controlled flyback topology for air conditioning applications using VIPer0P 1.0	13 Sep 2018	13 Sep 2018 AN4940 12 V, 7.2 W VIPer0P IR remote controlled flyback topology for air conditioning applications using VIPer0P 1.0
PDF	AN4924 12 V, 8.4 W peak power 30 W isolated flyback converter using VIPer38HD 1.0	13 Sep 2018	13 Sep 2018 AN4924 12 V, 8.4 W peak power 30 W isolated flyback converter using VIPer38HD 1.0
PDF	AN4812 15 W, 12 V output, isolated flyback converter using Viper35HD device from the VIPer™ Plus family of high voltage converters 2.0	26 Sep 2019	26 Sep 2019 AN4812 15 W, 12 V output, isolated flyback converter using Viper35HD device from the VIPer™ Plus family of high voltage converters 2.0
PDF	AN4830 15 W, 5 V - 12 V double output, isolated flyback converter based on Viper37LE/D 1.0	13 Sep 2018	13 Sep 2018 AN4830 15 W, 5 V - 12 V double output, isolated flyback converter based on Viper37LE/D 1.0
PDF	AN5030 16 W, triple output, quasi-resonant flyback converter for air conditioning applications using VIPerPlus – VIPER35LD 1.0	13 Sep 2018	13 Sep 2018 AN5030 16 W, triple output, quasi-resonant flyback converter for air conditioning applications using VIPerPlus – VIPER35LD 1.0
PDF	AN4410 3 W, 5 V isolated flyback converter using the VIPer06HN, from the VIPer™ plus family 2.0	13 Sep 2018	13 Sep 2018 AN4410 3 W, 5 V isolated flyback converter using the VIPer06HN, from the VIPer™ plus family 2.0
PDF	AN4418 3 W, 5 V isolated flyback converter using the VIPer06HS, from the VIPer™ plus family 2.0	13 Sep 2018	13 Sep 2018 AN4418 3 W, 5 V isolated flyback converter using the VIPer06HS, from the VIPer™ plus family 2.0
PDF	AN5335 35W transition-mode flyback converter with ultra-low THD based on HVLED007 1.2	19 Dec 2019	19 Dec 2019 AN5335 35W transition-mode flyback converter with ultra-low THD based on HVLED007 1.2
PDF	AN4404 4 W, 12 V isolated flyback converter using the VIPer06HS, from the VIPer™ plus family 2.0	13 Sep 2018	13 Sep 2018 AN4404 4 W, 12 V isolated flyback converter using the VIPer06HS, from the VIPer™ plus family 2.0
PDF	AN2753 6 W single-output VIPer17 demonstration board 2.1	13 Sep 2018	13 Sep 2018 AN2753 6 W single-output VIPer17 demonstration board 2.1
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	AN4407 Advantage of the use of an added driver source lead in discrete Power MOSFETs 2.0	13 Sep 2018	13 Sep 2018 AN4407 Advantage of the use of an added driver source lead in discrete Power MOSFETs 2.0
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 2020	24 Mar 2020 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 2020	24 Mar 2020 AN4021 Calculation of reverse losses in a power diode 1.0
PDF	AN2840 EVLVIP17-5WCHG: 5 W low standby consumption battery charger demonstration board based on the VIPER17HN 1.1	13 Sep 2018	13 Sep 2018 AN2840 EVLVIP17-5WCHG: 5 W low standby consumption battery charger demonstration board based on the VIPER17HN 1.1
PDF	AN2950 EVLVIPER28L-10W: 5 V/10 W, 60 kHz isolated flyback with extra power management 1.0	13 Sep 2018	13 Sep 2018 AN2950 EVLVIPER28L-10W: 5 V/10 W, 60 kHz isolated flyback with extra power management 1.0
PDF	AN1453 NEW FAMILY OF 150V POWER SCHOTTKY 1.1	24 Mar 2020	24 Mar 2020 AN1453 NEW FAMILY OF 150V POWER SCHOTTKY 1.1
PDF	AN5046 Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages 4.0	24 Mar 2020	24 Mar 2020 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 2020	24 Mar 2020 AN5088 Rectifiers thermal management, handling and mounting recommendations 2.0
PDF	AN443 SERIES OPERATION ON FAST RECTIFIERS 2.1	24 Mar 2020	24 Mar 2020 AN443 SERIES OPERATION ON FAST RECTIFIERS 2.1
PDF	AN2934 STEVAL-ISA062V1: 6 W, wide-range dual and single output SMPS demonstration board based on the VIPer17 1.0	13 Sep 2018	13 Sep 2018 AN2934 STEVAL-ISA062V1: 6 W, wide-range dual and single output SMPS demonstration board based on the VIPer17 1.0
PDF	AN4259 STEVAL-ISA117V1 12 V / 4.2 W, 60 kHz flyback isolated with VIPer16LN 3.0	13 Sep 2018	13 Sep 2018 AN4259 STEVAL-ISA117V1 12 V / 4.2 W, 60 kHz flyback isolated with VIPer16LN 3.0
PDF	AN4372 STEVAL-ISA134V1: 12 V / 4 W, 115 kHz isolated flyback 2.0	13 Sep 2018	13 Sep 2018 AN4372 STEVAL-ISA134V1: 12 V / 4 W, 115 kHz isolated flyback 2.0
PDF	AN4878 STEVAL-ISA175V1 three-output isolated flyback converter for smart meter and power line communication systems based on VIPER26HD 1.0	13 Sep 2018	13 Sep 2018 AN4878 STEVAL-ISA175V1 three-output isolated flyback converter for smart meter and power line communication systems based on VIPER26HD 1.0
PDF	AN4905 STEVAL-ISA180V1 12 V/0.6 A isolated flyback demo with VIPer0P 1.0	13 Sep 2018	13 Sep 2018 AN4905 STEVAL-ISA180V1 12 V/0.6 A isolated flyback demo with VIPer0P 1.0
PDF	AN869 Tj max limit of Schottky diodes 2.2	24 Mar 2020	24 Mar 2020 AN869 Tj max limit of Schottky diodes 2.2
PDF	AN4419 VIPER37HE: 15 W wide range single output evaluation board 1.0	13 Sep 2018	13 Sep 2018 AN4419 VIPER37HE: 15 W wide range single output evaluation board 1.0
PDF	AN2929 Wide range [90 V - 265 V] input, 5 V - 12 W output VIPER27LN demonstration board with improved standby performance 2.0	13 Sep 2018	13 Sep 2018 AN2929 Wide range [90 V - 265 V] input, 5 V - 12 W output VIPER27LN demonstration board with improved standby performance 2.0
PDF	AN3011 Wide range input (90 - 265), single output (5 V-11 W) EVLVIP27H-12SB, VIPer27 demonstration board 1.1	13 Sep 2018	13 Sep 2018 AN3011 Wide range input (90 - 265), single output (5 V-11 W) EVLVIP27H-12SB, VIPer27 demonstration board 1.1