VIPER22A Datasheet, Features, Pinout, and Applications

Overview of the VIPER22A

The VIPER22A is designed for offline power conversion in applications such as battery chargers, power adapters, and auxiliary power supplies. Its integrated architecture simplifies design, reduces component count, and enhances reliability.

Specifications and Features

VIPER22A Specifications

• Input Voltage Range: 85-265V AC

• Output Power: Up to 14W for wide-range input (universal mains)

• Switching Frequency: 60kHz fixed

• MOSFET Drain-Source Voltage: Up to 730V

• Package: DIP-8, SO-8

VIPER22A Features

• Integrated Power MOSFET: Reduces external component count.

• Current-Mode Control: Enhances performance and stability.

• Overtemperature Protection: Ensures safe operation under thermal stress.

• Undervoltage Lockout: Prevents operation below a safe voltage threshold.

• High Efficiency: Optimized for low power consumption in standby mode.

VIPER22A Pinout

Pin Configuration and Numbering

The VIPER22A is available in DIP-8 and SO-8 packages. The pinout is critical for ensuring correct connections and optimal performance in the power supply design.

Pin Configuration

Pin Name	Description	Function
Drain	Drain of the internal MOSFET	High-voltage switching node
VDD	Power Supply	Powers the control circuitry
Source	Source of the internal MOSFET	Ground reference for the MOSFET
FB	Feedback	Regulates the output voltage

Functions of Each Pin

• Drain: The Drain pin is the high-voltage switching node, directly connected to the internal MOSFET. It handles the main power transfer during switching operations.

• VDD: The VDD pin supplies power to the internal control circuitry of the VIPER22A. It typically receives power from an auxiliary winding or a low-voltage regulator.

• Source: The Source pin serves as the ground reference for the MOSFET and is typically connected to the circuit ground.

• FB: The Feedback (FB) pin is used to regulate the output voltage by adjusting the duty cycle of the internal MOSFET, ensuring a stable and accurate output.

VIPER22A Equivalents

The VIPER22A can be compared to other integrated power supply ICs like the LNK364PN and TNY280PN. These components also integrate high-voltage MOSFETs with control circuitry, offering similar functionalities but may differ in terms of power output and package options.

VIPER22A Applications

AC-DC Power Supplies

The VIPER22A is ideal for AC-DC power supply designs, particularly in applications where efficiency and compactness are critical. It is commonly used in battery chargers, power adapters, and auxiliary power supplies.

LED Drivers

In LED driver applications, the VIPER22A offers precise current regulation and high efficiency, making it suitable for a wide range of lighting products.

Industrial Power Conversion

The VIPER22A is also used in industrial power conversion systems, where its robustness and reliability ensure consistent performance under harsh operating conditions.

Consumer Electronics

The VIPER22A is widely used in consumer electronics, providing efficient power conversion in devices such as televisions, set-top boxes, and audio equipment.

VIPER22A Advantages and Disadvantages

Advantages:

• Integrated Design: Reduces component count and simplifies power supply design.

• High Efficiency: Low standby power consumption and high operating efficiency.

• Wide Input Voltage Range: Operates across universal mains voltages.

• Robust Protection Features: Includes overtemperature protection and undervoltage lockout.

Disadvantages:

• Fixed Switching Frequency: May not be suitable for applications requiring variable frequency control.

• Package Limitations: Available only in DIP-8 and SO-8, which may limit miniaturization in some designs.

VIPER22A Package

The VIPER22A is available in both DIP-8 and SO-8 packages, offering options for through-hole and surface-mount applications. The package choice depends on the specific requirements of the design, such as thermal performance and PCB space constraints.

VIPER22A Manufacturer

The VIPER22A is manufactured by STMicroelectronics, a leading global supplier of semiconductors. The company is known for its high-quality components used in a wide range of electronic devices.

VIPER22A Datasheet

The VIPER22A datasheet provides detailed information on the electrical characteristics, pin configuration, and recommended operating conditions. Designers should refer to the datasheet for comprehensive guidelines on integrating the IC into their designs.

Conclusion

The VIPER22A is a versatile and efficient solution for a wide range of power supply designs. With its integrated MOSFET, current-mode control, and robust protection features, it simplifies design while ensuring reliable performance across various applications.

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