VIPER38LDTR

Overview

The VIPER38LDTR is an offline switch from the VIPerPlus family, designed for flyback converter topologies. It integrates an 800 V avalanche-rugged power MOSFET with a PWM current-mode controller. The device operates at a fixed frequency of 60 kHz and supports a supply voltage range of 8.5 V to 23.5 V. It features a startup voltage of 14 V and can deliver up to 20 W of power. The component includes protections such as dual-level overcurrent protection, output overvoltage, short-circuit, and thermal shutdown. It is housed in a 16-SO package.

Feature Summary

• Integrates an 800 V rugged power MOSFET with PWM current-mode control for high-voltage conversion.
• Features embedded high-voltage start-up and sense FETs to minimize external component count.
• Includes adjustable extra power timer (EPT) to sustain overload conditions temporarily.
• Provides comprehensive protection against transformer saturation, secondary diode short-circuits, and thermal faults.

Applications

• General-purpose isolated flyback power supplies
• Adapters and chargers requiring low no-load consumption
• Consumer electronics with stringent energy-saving standards

Procurement Notes

Verify the specific suffix 'L' indicates the 60 kHz operating frequency variant distinct from the 'H' type. Confirm the tape and reel packaging format matches automated assembly requirements. Ensure compatibility with RoHS3 and Ecopack2 environmental standards. Check for any recent production change notices regarding assembly sites or labeling updates before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a fixed 60 kHz switching frequency. It is suitable for applications needing peak power handling up to 20 W with minimal external components. Consider the integrated jitter feature for EMI reduction. Evaluate the soft-start capability for reducing startup stress. Verify that the 800 V breakdown voltage meets the input AC range requirements of the target application.

Part Context

This part belongs to the VIPerPlus family of high-voltage converters. It is manufactured by STMicroelectronics and is classified as an active product. The device is part of the broader portfolio of offline AC/DC converters designed for efficient power management in compact form factors.

Replacement Considerations

VIPER38LD is the tube-packaged equivalent of this tape-and-reel component. Both share identical electrical specifications and functionality within the VIPerPlus series.