STMicroelectronics

VIPER12AS

VIPER12AS Description

The VIPER12AS from STMicroelectronics is a high-voltage, offline switching regulator IC designed for efficient power conversion in compact applications. Part of the VIPER™ series, this obsolete model integrates a 730V breakdown voltage MOSFET with a 60kHz switching frequency, making it suitable for low-power AC/DC converters. Its 9V to 38V supply range and 14.5V startup voltage ensure reliable operation in diverse power conditions. Packaged in an 8SOIC tube, the VIPER12AS delivers 8W of power with built-in protections like current limiting, over-temperature, and over-voltage shutdown, enhancing system robustness.

VIPER12AS Features

• Integrated High-Voltage MOSFET: 730V breakdown for offline applications.
• Wide Input Range: Operates from 9V to 38V, accommodating fluctuating power sources.
• Low Startup Voltage: 14.5V ensures quick initialization.
• Comprehensive Protections: Includes current limiting, over-temperature, and over-voltage fault protection.
• Compact Design: 8SOIC package with MSL 1 (Unlimited) moisture sensitivity, ideal for surface-mount applications.
• 60kHz Switching Frequency: Balances efficiency and noise performance.

VIPER12AS Applications

The VIPER12AS excels in low-power offline SMPS designs, such as:

• Auxiliary power supplies for appliances and industrial equipment.
• LED drivers requiring stable, low-wattage conversion.
• Consumer electronics (e.g., set-top boxes, adapters) where space and efficiency are critical.
• Battery chargers with stringent protection requirements.

Conclusion of VIPER12AS

Though obsolete, the VIPER12AS remains a reliable choice for 8W offline power conversion, offering high integration, robust protections, and compact packaging. Its wide input range and fault resilience make it ideal for cost-sensitive, space-constrained designs. Engineers seeking alternatives should consider newer VIPER series models for enhanced features, but the VIPER12AS retains value in legacy or low-complexity systems.