VIPER122LSTR

Overview

The VIPER122LSTR is a high-voltage converter from the VIPerPlus family, integrating a rugged 730 V power MOSFET with PWM control. It features an internal startup circuit and current sense, reducing bill-of-materials complexity. The device operates at a fixed switching frequency of 60 kHz with frequency jittering to spread EMI. It supports buck, buck-boost, and flyback topologies. Key electrical parameters include a breakdown output voltage of 730 V, a start-up voltage of 13 V, and a VCC supply range of 11.5 V to 23.5 V. The maximum duty cycle is 80%, and it provides short-circuit protection and thermal shutdown.

Feature Summary

• Integrates a 730 V avalanche-rugged power MOSFET with PWM controller for compact design
• Embeds high-voltage startup and current sense circuitry to minimize external components
• Utilizes frequency jittering to reduce electromagnetic interference and filter size
• Features burst mode operation for extremely low input power consumption at light loads

Applications

• General-purpose AC/DC converters
• Buck converter mains applications
• Isolated flyback converters
• Industrial power supplies

Procurement Notes

Verify the specific suffix 'LSTR' against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the intended PCB footprint, as the component utilizes a 10-SSOP package. Cross-reference the part number with authorized distributors to confirm active status and availability constraints before finalizing procurement plans.

Selection Notes

Select this component for designs requiring high integration and reduced bill-of-materials in offline power supplies. The embedded 730 V MOSFET and startup circuitry simplify schematic design. Consider the 60 kHz switching frequency and jittering feature when designing EMI filters. Verify that the required output power and isolation requirements align with the device's capabilities and the chosen topology.

Part Context

The VIPER122LSTR belongs to the VIPerPlus family of high-voltage converters by STMicroelectronics. This series is designed to replace discrete solutions by combining power switching and control logic in a single package. The LSTR suffix typically denotes the specific packaging configuration, such as tape and reel, suitable for automated surface-mount assembly processes.

Replacement Considerations

Consult official substitution guides for direct equivalents within the VIPerPlus family. Verify pinout compatibility and electrical parameter alignment before replacing existing inventory.