VIPER27LDTR

Overview

The VIPER27LDTR is an AC/DC converter from the VIPerPlus family, designed as a fixed frequency 12W high-performance offline high-voltage converter. It utilizes a Flyback topology with Si technology and operates at a switching frequency of 60 kHz. The device features a maximum duty cycle of 80% and a breakdown voltage of 800 V. It supports an input power supply voltage range from 8.5 V to 23.5 V, with a typical operating supply current of 2.5 mA. The component is housed in a SOIC-Narrow-16 package and functions within a temperature range of -40°C to +150°C.

Feature Summary

• Integrates an 800 V avalanche rugged power section for robust operation.
• Includes PWM control with two levels of over-current protection and hysteretic thermal shutdown.
• Features safe auto-restart capability after any fault condition removal.
• Supports burst mode operation to meet standby energy saving regulations.

Applications

• Adapters and chargers
• General purpose offline supplies
• Battery chargers

Procurement Notes

Verify the specific suffix 'LDTR' against official STMicroelectronics documentation to confirm the exact switching frequency variant (60 kHz) and packaging details. Ensure compatibility with the required flyback topology and input voltage ranges before integration. Cross-reference the datasheet for precise thermal management requirements given the wide operating temperature range.

Selection Notes

Select this component for applications requiring a fixed frequency offline converter with integrated high-voltage MOSFET. It is suitable for designs needing low standby power consumption and built-in protection mechanisms such as overvoltage, overload, and thermal shutdown. Consider the 60 kHz switching frequency when designing EMI filters and transformer specifications.

Part Context

This part belongs to the VIPer27 series within the VIPerPlus family of high-voltage converters. It is manufactured by STMicroelectronics and is classified under AC/DC Converters and PMIC - Power Management ICs. The device is designed to streamline system development by integrating multiple power management functions into a single package.

Replacement Considerations

Consult official STMicroelectronics substitution guides for verified alternatives. Generic cross-references should be validated against electrical parameters and pinout configurations.

FAQ

What is the switching frequency of the VIPER27LDTR?

The VIPER27LDTR operates at a fixed switching frequency of 60 kHz.

Does the VIPER27LDTR include thermal protection?

Yes, it includes hysteretic thermal shutdown protection.