ST Life.augmented


1.5 W double output buck demonstration board based on the VIPER16LD
  • active Active

The STEVAL-ISA119V1 is a dual output buck demonstration board using the VIPER16LD, a new off-line high voltage converter by STMicroelectronics which has been specifically developed for non-isolated SMPS.

Output regulation is easily achieved through a voltage divider to the output voltage.

The VIPER16LD can work with or without an external supply. In the former case, very low standby consumption is possible(< 50 mW at 265 Vac) while in the latter case, the cost and complication of the IC supply network may be reduced.

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

The available protection features are thermal shutdown with hysteresis and delayed overload protection.

pdf Download
Data Brief

Key Features

  • Input voltage range (VIN): 90 VRMSto 265 VRMS
  • Output voltage 1 (VOUT1)= 12 V
  • Max output current 1: (IOUT1) = 0.1 A
  • Output voltage 2: (VOUT2) = 5 V (through LDO)
  • Max output current 2: (IOUT2)= 0.05 A
  • Precision of output regulation ΔVOUT_LF= ±5%
  • High frequency output voltage ripple ΔVOUT_HF= 50 mV
  • Max ambient operating temperature TA= 60 °C


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1933: 1.5 W double output buck demonstration board based on the VIPER16LD
1.0 168 KB

Application Notes

Description Version Size
AN4345: STEVAL-ISA119V1: 1.5 W double output buck product evaluation board based on the VIPER16LD
1.0 2,912 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-ISA119V1 gerber files
1.0 312 KB

Bill of Materials

Description Version Size
1.0 10 KB

Schematic Pack

Description Version Size
STEVAL-ISA119V1 schematics
1.0 54 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA119V1ActiveVIPER16HBuy Direct56.35Distributor reported inventory date: 2016-02-12
Distributor NameRegionStockMin. order

(*) 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
(**) The Material Declaration forms available on 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.
Feedback Form
Customer Feedback