Vishay Semiconductor Opto Division
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BPW41N
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BPW41N

Introduction

The BPW41N is a phototransistor belonging to the category of optoelectronic components. It is commonly used for light sensing applications and possesses specific characteristics that make it suitable for various electronic devices. This entry provides an overview of the BPW41N, including its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

  • Category: Optoelectronic Component
  • Use: Light Sensing Applications
  • Characteristics: High Sensitivity, Fast Response Time
  • Package: TO-5 Metal Can
  • Essence: Phototransistor
  • Packaging/Quantity: Typically Available in Reel Packaging

Specifications

  • Peak Wavelength: 900 nm
  • Collector-Emitter Voltage: 32 V
  • Emitter-Collector Voltage: 5 V
  • Collector Current: 50 mA
  • Power Dissipation: 200 mW
  • Operating Temperature Range: -40°C to +100°C

Detailed Pin Configuration

The BPW41N phototransistor has a standard three-pin configuration: 1. Collector (C) 2. Base (B) 3. Emitter (E)

Functional Features

  • High sensitivity to light in the near-infrared spectrum
  • Fast response time for rapid detection of light changes
  • Suitable for use in ambient light sensing and optical switching applications

Advantages and Disadvantages

Advantages

  • High sensitivity enables accurate light detection
  • Fast response time allows for quick reaction to light variations
  • Compatible with automated assembly processes due to reel packaging

Disadvantages

  • Limited spectral response range compared to some other photodetectors
  • Susceptible to ambient temperature variations affecting performance

Working Principles

The BPW41N operates based on the principle of light-induced conductivity modulation. When exposed to light, the phototransistor's base current increases, leading to amplified collector current, thereby converting light energy into electrical signals.

Detailed Application Field Plans

The BPW41N finds extensive use in various applications, including: - Ambient light sensing in automatic brightness control systems for displays - Optical switching in proximity sensors and reflective object sensors - Light beam interruption detection in industrial automation

Detailed and Complete Alternative Models

Some alternative phototransistors to consider include: - BPW42N: Similar characteristics with enhanced sensitivity - BPW51N: Higher power dissipation and wider operating temperature range - TEPT5700: Greater spectral response range for diverse light sources

In conclusion, the BPW41N phototransistor offers high sensitivity and fast response time, making it suitable for light sensing applications in diverse electronic devices. Its operational principles, advantages, and detailed application field plans provide valuable insights into its functionality and potential uses.

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技術ソリューションにおける BPW41N の適用に関連する 10 件の一般的な質問と回答をリストします。

  1. What is the BPW41N photodiode used for?

    • The BPW41N photodiode is commonly used for light detection and measurement in various technical applications.

  2. What is the spectral response of the BPW41N photodiode?

    • The BPW41N has a spectral response range of approximately 350nm to 1100nm, making it suitable for detecting a wide range of light wavelengths.

  3. What are the typical operating conditions for the BPW41N?

    • The BPW41N operates well under normal ambient conditions with a temperature range of -40°C to 100°C and a maximum reverse voltage of 32V.

  4. How sensitive is the BPW41N to light?

    • The BPW41N has a high sensitivity to light, with a radiant sensitivity typically around 0.6A/W at 880nm.

  5. Can the BPW41N be used for proximity sensing?

    • Yes, the BPW41N can be utilized for proximity sensing applications due to its responsiveness to ambient light changes.

  6. What are some common circuit configurations for using the BPW41N?

    • Common circuit configurations include transimpedance amplifiers or simple voltage dividers to convert the photodiode current into a measurable voltage.

  7. Is the BPW41N suitable for use in automotive applications?

    • Yes, the BPW41N is often used in automotive applications for tasks such as rain sensors, twilight switches, and interior lighting control.

  8. What are the key considerations for designing a circuit with the BPW41N?

    • Key considerations include minimizing noise, selecting appropriate amplification components, and accounting for ambient light interference.

  9. Can the BPW41N be used in medical devices?

    • Yes, the BPW41N can be integrated into medical devices for tasks such as pulse oximetry, where accurate light detection is crucial.

  10. Are there any specific precautions to take when handling the BPW41N?

    • It's important to handle the BPW41N with care to avoid damaging the sensitive photodiode element, and to protect it from static discharge during assembly and use.