12 V/12 W wide range non-isolated flyback based on the VIPER26LN

The STEVAL-ISA110V1 demonstration board is a 12 V-1 A power supply set in non-isolated flyback topology using the VIPER26LN, a new offline high-voltage converter by STMicroelectronics.

The features of the device include an 800 V avalanche-rugged power section, PWM operation at 60 kHz with frequency jittering for lower EMI, current limiting with adjustable set point, onboard soft-start, a safe auto-restart after a fault condition, and low standby power.

Protection features include thermal shutdown with hysteresis, delayed overload protection, and open loop failure protection.

Key Features

  • Universal input mains range:
    • input voltage 90 - 264 VAC
    • frequency 45 - 65 Hz
  • Single output voltage: 12 V @ 1 A continuous operation
  • Standby mains consumption: < 30 mW @ 265 VAC
  • Average efficiency: > 85%
  • Fully protected against faults (overload, feedback disconnection and overheating)
  • EMI: according to EN55022-Class-B





Description バージョン サイズ
DB1870 DB1870: 12 V/12 W wide-range non-isolated flyback based on the VIPER26LN 1.0 1 MB


Board Manufacturing Specifications
Description バージョン サイズ
STEVAL-ISA110V1 gerber files 1.0 89 KB
Bill of Materials
Description バージョン サイズ
Schematic Pack
Description バージョン サイズ
STEVAL-ISA110V1 schematics 1.0 142 KB


Description バージョン サイズ
Evaluation products license agreement 1.4 128 KB
サポート & コミュニティ

サンプル & 購入

製品型番 Core Product Marketing Status Unit Price (US$) * 数量 ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-ISA110V1 VIPER26LN Active 107 1 NEC EAR99 ITALY MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

品質 & 信頼性

製品型番 Marketing Status パッケージ Grade RoHS Compliance Grade Material Declaration**
STEVAL-ISA110V1 アクティブCARDIndustrialEcopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.