VIPER28HD

Product Overview

Category

VIPER28HD belongs to the category of integrated circuits (ICs) specifically designed for power supply applications.

Use

This IC is commonly used in various power supply designs, including offline converters and low-power battery chargers.

Characteristics

• VIPER28HD is a highly efficient and reliable power management solution.
• It offers excellent performance in terms of voltage regulation and power conversion.
• The IC operates at high frequencies, enabling compact and lightweight power supply designs.
• It incorporates advanced protection features to ensure safe operation under different conditions.

Package

VIPER28HD is available in a compact and industry-standard package, such as the DIP-8 or SO-8 package. These packages provide ease of integration into various circuit designs.

Essence

The essence of VIPER28HD lies in its ability to efficiently convert and regulate electrical power, making it an essential component in modern power supply systems.

Packaging/Quantity

VIPER28HD is typically sold in reels or tubes containing a specific quantity of ICs, usually ranging from 100 to 1000 units per package.

Specifications

• Input Voltage Range: 85V to 265V AC
• Output Voltage Range: Adjustable, depending on the application
• Maximum Output Power: Up to 10W
• Switching Frequency: 60kHz to 120kHz
• Operating Temperature Range: -40°C to +125°C
• Efficiency: Up to 90%

Detailed Pin Configuration

1. VCC: Power supply input pin.
2. GND: Ground reference pin.
3. FB: Feedback pin for voltage regulation.
4. CS: Current sense pin for current control.
5. COMP: Compensation pin for stability optimization.
6. EN/UVLO: Enable/Undervoltage lockout pin.
7. VSENSE: Voltage sense pin for feedback control.
8. DRAIN: Power switch drain pin.

Functional Features

• High voltage startup circuitry for reliable operation.
• Integrated power MOSFET for efficient power conversion.
• Overvoltage and overcurrent protection mechanisms.
• Soft-start function to prevent inrush current during startup.
• Frequency jittering for reduced electromagnetic interference (EMI).
• Built-in thermal shutdown protection.

Advantages and Disadvantages

Advantages

• High efficiency leads to lower power dissipation and reduced heat generation.
• Compact package size allows for space-saving designs.
• Wide input voltage range enables compatibility with various power sources.
• Advanced protection features enhance system reliability.
• Adjustable output voltage provides flexibility for different applications.

Disadvantages

• Limited maximum output power compared to higher-rated ICs.
• Requires careful consideration of external components for optimal performance.
• May require additional circuitry for specific application requirements.

Working Principles

VIPER28HD operates based on a flyback topology, where energy is stored in an inductor during the switch-on period and released to the output during the switch-off period. This switching action allows for efficient power conversion and regulation. The IC utilizes a feedback mechanism to adjust the duty cycle of the power switch, ensuring stable output voltage under varying load conditions.

Detailed Application Field Plans

VIPER28HD finds extensive use in various applications, including: 1. Offline power supplies for consumer electronics. 2. LED lighting systems. 3. Battery chargers for portable devices. 4. Industrial automation equipment. 5. Automotive electronics.

Detailed and Complete Alternative Models

1. VIPER26HD: Similar functionality with slightly lower specifications.
2. VIPER27HD: Higher output power capability with comparable features.
3. VIPER29HD: Enhanced protection features and wider operating temperature range.

These alternative models offer similar functionality and can be considered as substitutes depending on specific application requirements.

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