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VIPER27LD
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VIPER27LD

Product Overview

Category

VIPER27LD belongs to the category of integrated circuits (ICs).

Use

It is primarily used as a high-voltage converter for offline SMPS (Switched-Mode Power Supply) applications.

Characteristics

  • High voltage capability
  • Low standby power consumption
  • Wide input voltage range
  • Integrated protection features
  • Compact package size

Package

VIPER27LD is available in a compact and industry-standard DIP-8 (Dual In-line Package 8) package.

Essence

The essence of VIPER27LD lies in its ability to efficiently convert high voltages for offline power supply applications while maintaining low power consumption during standby mode.

Packaging/Quantity

VIPER27LD is typically packaged in reels or tubes, with each reel containing 2500 units.

Specifications

  • Input Voltage Range: 85V to 265V AC
  • Output Voltage Range: 5V to 30V DC
  • Maximum Output Current: 700mA
  • Switching Frequency: 60kHz
  • Standby Power Consumption: less than 50mW
  • Operating Temperature Range: -40°C to +150°C

Detailed Pin Configuration

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for output voltage regulation
  4. CS: Current sense input for current limitation
  5. COMP: Compensation pin for stability control
  6. SD: Shutdown pin for enabling/disabling the device
  7. HV: High-voltage startup circuit connection
  8. Drain: Switching transistor drain connection

Functional Features

  • High-voltage startup circuit enables direct connection to the rectified mains voltage
  • Internal current limit protection prevents excessive load current
  • Overvoltage protection safeguards against voltage spikes
  • Thermal shutdown protection prevents overheating
  • Soft-start function reduces inrush current during startup

Advantages and Disadvantages

Advantages

  • High voltage capability allows for versatile applications
  • Low standby power consumption enhances energy efficiency
  • Integrated protection features ensure device safety
  • Compact package size enables space-saving designs

Disadvantages

  • Limited maximum output current may restrict certain applications
  • Higher cost compared to some alternative models

Working Principles

VIPER27LD operates on the principle of pulse width modulation (PWM) control. It converts the high-voltage AC input into a regulated DC output by rapidly switching the internal power transistor. The feedback mechanism adjusts the duty cycle of the switching signal to maintain the desired output voltage.

Detailed Application Field Plans

VIPER27LD finds extensive use in various offline SMPS applications, including: - Power adapters - LED lighting - Home appliances - Industrial equipment - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to VIPER27LD include: - VIPER26LD - VIPER28LD - VIPER32LD - LNK364GN

These models provide comparable features and can be considered as alternatives based on specific application requirements.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av VIPER27LD i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of VIPER27LD in technical solutions:

  1. Q: What is VIPER27LD?
    A: VIPER27LD is a high-voltage converter IC designed for offline power supplies.

  2. Q: What is the input voltage range of VIPER27LD?
    A: The input voltage range of VIPER27LD is typically between 85V and 265V AC.

  3. Q: What is the output voltage range of VIPER27LD?
    A: The output voltage range of VIPER27LD can be adjusted from 5V to 30V DC.

  4. Q: Can VIPER27LD handle high power loads?
    A: Yes, VIPER27LD is capable of delivering up to 7W of power.

  5. Q: Is VIPER27LD suitable for low-power applications as well?
    A: Yes, VIPER27LD can be used in both low-power and high-power applications.

  6. Q: Does VIPER27LD have built-in protection features?
    A: Yes, VIPER27LD includes various protection features such as overvoltage, overcurrent, and thermal shutdown.

  7. Q: Can VIPER27LD operate in a wide temperature range?
    A: Yes, VIPER27LD has a wide operating temperature range of -40°C to 150°C.

  8. Q: What type of control does VIPER27LD use?
    A: VIPER27LD utilizes a pulse frequency modulation (PFM) control scheme.

  9. Q: Can VIPER27LD be used in dimmable lighting applications?
    A: Yes, VIPER27LD supports dimming functionality and can be used in dimmable lighting solutions.

  10. Q: Are there any evaluation boards available for VIPER27LD?
    A: Yes, STMicroelectronics provides evaluation boards and reference designs for VIPER27LD to facilitate its implementation in various applications.

Please note that these answers are general and may vary depending on the specific application and requirements.