VIPER115LSTR

Overview

The VIPER115LSTR is an energy-saving offline high voltage converter from STMicroelectronics, part of the VIPerPlus family. It integrates a 800 V avalanche-rugged power MOSFET with a PWM current mode controller. The device supports Buck, Buck-Boost, and Flyback topologies with a switching frequency of 60 kHz ± 7%. It operates on a supply voltage range of 4.5 V to 30 V, features a maximum duty cycle of 80%, and has a typical drain current limit of 590 mA. Packaged in a 10-SSOP surface-mount format.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET for extended input voltage coverage.
• Includes embedded high-voltage startup circuitry and sense-FET for component minimization.
• Features jittered switching frequency to reduce electromagnetic interference filter costs.

Applications

• Offline flyback converters
• Buck converter designs
• Buck-Boost converter applications

Procurement Notes

Verify the specific suffix 'LSTR' against the manufacturer's official datasheet to confirm the 60 kHz switching frequency variant and SSOP-10 package configuration. Ensure compatibility with required thermal management and PCB layout guidelines for surface-mount installation.

Selection Notes

Select this component for designs requiring a 60 kHz switching frequency and 590 mA drain current capability. It is suitable for applications needing wide input voltage ranges and low standby power consumption without external optocouplers in primary-side regulation topologies.

Part Context

This part belongs to the VIPer11 series of energy-saving offline converters. It shares the core architecture with variants like VIPER114LSTR and VIPER115HSTR, differing primarily in switching frequency and current limits within the same 10-SSOP package family.

Replacement Considerations

VIPER114LSTR offers similar functionality with a lower drain current limit of 480 mA. VIPER115HSTR provides the same current rating but operates at a higher 120 kHz switching frequency.