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STMicroelectronics VIPER37LD - High-Voltage Offline Switcher IC

The VIPER37LD from STMicroelectronics is a high-performance 800V offline switcher IC designed for flyback topology AC-DC power conversion applications up to 20W. Part of the VIPer™ plus series, this integrated solution combines a high-voltage power MOSFET with a PWM controller, delivering reliable and efficient power conversion for industrial, consumer, and telecom applications.

Key Features & Benefits

  • 800V High-Voltage Breakdown: Robust design for universal AC input applications
  • Integrated Flyback Controller: Simplifies design with built-in PWM control and power switch
  • 20W Power Output: Ideal for low-to-medium power AC-DC converters
  • 60kHz Switching Frequency: Optimized for compact transformer design
  • Comprehensive Protection: Current limiting, over-temperature, and over-voltage protection
  • Wide Operating Range: -40°C to 150°C junction temperature for harsh environments
  • Low Start-Up Voltage: 14V start-up for efficient operation
  • RoHS Compliant: Meets environmental standards for global distribution

Typical Applications

  • AC-DC adapters and chargers
  • Auxiliary power supplies for industrial equipment
  • Home appliance control circuits
  • LED lighting drivers
  • Standby and auxiliary power for telecom systems

Why Choose VIPER37LD?

The VIPER37LD offers design engineers a proven, cost-effective solution for offline power conversion with minimal external components. Its integrated protection features ensure reliable operation, while the 16-SOIC surface-mount package enables compact PCB layouts. Backed by STMicroelectronics' quality and technical support, this IC is ideal for production-scale designs requiring long lifecycle availability and full traceability.

Package: 16-SOIC (16-SO) Surface Mount
Compliance: RoHS/REACH compliant
Availability: Tube packaging for automated assembly

Product attributes Property Value
Manufacturer STMicroelectronics
Product Series VIPer™ plus
Packaging Tube |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 800V
Topology Flyback
Voltage - Start Up 14 V
Voltage - Supply (Vcc/Vdd) 8.5V ~ 23.5V
Duty Cycle 80%
Frequency - Switching 60kHz
Power (Watts) 20 W
Fault Protection Current Limiting, Over Temperature, Over Voltage
Control Features -
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 16-SOIC (0.154", 3.90mm Width)
Supplier Device Package 16-SO
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY