VIPER12AS

Overview

The VIPER12AS-E is a monolithic AC/DC converter from the VIPerPlus family, integrating a high-voltage power MOSFET and a PWM controller in an SOIC-8 package. It operates as an off-line switch-mode power supply with a maximum output voltage of 730 V and a peak drain current of 0.36 A. The device supports a switching frequency of 60 kHz and delivers up to 5 W of output power. It functions within an input voltage range of 9 V to 38 V for auxiliary supplies and handles universal mains inputs. The component features a low operating supply current of 4.5 mA and withstands temperatures from -40°C to +150°C.

Feature Summary

• Integrates a high-voltage power MOSFET and a smart PWM controller into a single compact package.
• Features automatic burst mode operation to minimize power consumption during light load conditions.
• Includes comprehensive protection mechanisms such as overvoltage hiccup mode, thermal shutdown, and under-voltage lockout.

Applications

• Universal input offline switch-mode power supplies
• Battery chargers for portable devices
• Standby power supplies for consumer electronics

Procurement Notes

Verify the specific suffix (e.g., -E) to confirm compliance with environmental directives such as RoHS. Confirm the packaging type, as the 'S' suffix indicates tube packaging while 'TR' indicates reel packaging. Ensure the source document explicitly lists the part number to avoid confusion with similar VIPerPlus variants. Cross-reference the datasheet revision date to ensure technical accuracy.

Selection Notes

Select this component for cost-sensitive applications requiring isolated AC/DC conversion up to 5 W. The integrated design reduces external component count compared to discrete solutions. Consider the SOIC-8 package constraints for thermal management at higher power levels. Verify that the 60 kHz fixed frequency meets EMI requirements for the target application without additional spread spectrum techniques.

Part Context

The VIPER12AS-E belongs to the VIPerPlus family of smart power ICs designed for low-power offline converters. This series combines robust avalanche ruggedness with advanced control logic. It serves as a foundational solution for replacing traditional transformer-based designs with integrated monolithic alternatives in small form factor adapters.

Replacement Considerations

The VIPER12ASTR-E is a verified alternative offering identical electrical specifications but supplied in tape-and-reel packaging instead of tubes. Both parts share the same pinout and functional characteristics within the VIPer12A-E series.