STEVAL-ISA119V1:1.5 W double output buck demonstration board based on the VIPER16LD

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.

Key Features

  • Input voltage range (VIN ): 90 VRMS to 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
Product Specifications
DescriptionVersionSize
DB1933: 1.5 W double output buck demonstration board based on the VIPER16LD1.0167 KB
Application Notes
DescriptionVersionSize
AN4345: STEVAL-ISA119V1: 1.5 W double output buck product evaluation board based on the VIPER16LD1.02 MB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-ISA119V1 gerber files1.0311 KB
Bill of Materials
DescriptionVersionSize
STEVAL-ISA119V1 BOM1.09 KB
Schematic Packs
DescriptionVersionSize
STEVAL-ISA119V1 schematics1.054 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STEVAL-ISA119V1VIPER16H56.351NECEAR99ITALY
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-ISA119V1CARDIndustrialEcopack2
1.5 W double output buck demonstration board based on the VIPER16LD STEVAL-ISA119V1
STEVAL-ISA119V1: 1.5 W double output buck product evaluation board based on the VIPER16LD STEVAL-ISA119V1
STEVAL-ISA119V1: 1.5 W double output buck product evaluation board based on the VIPER16LD STEVAL-ISA119V1
STEVAL-ISA119V1: 1.5 W double output buck product evaluation board based on the VIPER16LD STEVAL-ISA119V1
STEVAL-ISA119V1: 1.5 W double output buck product evaluation board based on the VIPER16LD STEVAL-ISA119V1
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2