VIPER318XDTR

Overview

The VIPER318XDTR is an offline high-voltage converter from the VIPerPlus family, integrating an 800 V avalanche-rugged power MOSFET with a PWM current-mode controller. It supports flyback, buck, and buck-boost topologies with a switching frequency of 30 kHz ±7%. The device delivers a drain current limit of 850 mA and operates within a supply voltage range of 4.5 V to 30 V. It features jittered frequency for EMI reduction, embedded soft-start, and comprehensive protections including overload, short-circuit, overvoltage, and thermal shutdown.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET with a PWM current-mode controller for compact design
• Supports multiple topologies including flyback, buck, and buck-boost configurations
• Features jittered switching frequency to minimize electromagnetic interference filter costs
• Includes embedded high-voltage startup, sense FET, and error amplifier for minimal external component count

Applications

• Offline power supplies requiring high input voltage ranges
• Flyback converter designs for general-purpose AC/DC conversion
• Buck and buck-boost converter applications in power management systems

Procurement Notes

Verify the specific suffix 'X' indicates the 30 kHz switching frequency variant when ordering. Confirm package integrity for the 16-SOIC form factor upon receipt. Ensure compliance with RoHS3 standards as specified in official documentation. Cross-reference the manufacturer part number with authorized distributor listings to validate authenticity and traceability before integration into production schedules.

Selection Notes

Select this component for applications requiring a fixed 30 kHz operating frequency within the VIPER31 series. It is suitable for designs needing 850 mA current limiting and support for non-isolated or isolated flyback topologies. Consider the 16-SOIC package constraints and thermal performance requirements. Evaluate system EMI filtering needs against the benefits of the integrated jitter feature for cost optimization in the power stage design.

Part Context

This device belongs to the VIPerPlus family of high-voltage converters from STMicroelectronics. It shares architectural similarities with other VIPER31 variants but is distinguished by its specific 30 kHz frequency designation. The family emphasizes energy efficiency through pulse frequency modulation at light loads and low no-load consumption, targeting stringent global energy-saving standards for offline power applications.

Replacement Considerations

Consider VIPER318LDTR for a 60 kHz frequency option or VIPER318HDTR for 132 kHz. Verify pin compatibility and thermal characteristics when substituting within the VIPER318 series. Ensure the alternative variant meets the specific switching frequency requirements of the target application design.