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LM3402HVMM
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LM3402HVMM

Product Overview

Category: Integrated Circuit (IC)

Use: The LM3402HVMM is a high-voltage, step-down constant current LED driver. It is designed to provide efficient and reliable power management for LED lighting applications.

Characteristics: - High voltage capability - Constant current output - Efficient power management - Suitable for LED lighting applications

Package: The LM3402HVMM is available in a small outline package (SOP) with 8 pins.

Essence: The LM3402HVMM is an essential component for driving LEDs with a constant current, ensuring optimal performance and longevity of the lighting system.

Packaging/Quantity: The LM3402HVMM is typically sold in reels containing a quantity of 250 units.

Specifications

  • Input Voltage Range: 4.5V to 75V
  • Output Current Range: Up to 1A
  • Switching Frequency: Adjustable up to 1MHz
  • Efficiency: Up to 95%
  • Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LM3402HVMM has the following pin configuration:

  1. VIN: Input voltage
  2. GND: Ground
  3. FB: Feedback pin for setting the desired output current
  4. EN: Enable pin for turning the device on/off
  5. VCC: Supply voltage for internal circuitry
  6. SW: Switch node for connecting the inductor and LED load
  7. NC: No connection
  8. NC: No connection

Functional Features

  • Wide input voltage range allows for versatile application in various LED lighting systems.
  • Constant current output ensures consistent brightness and prevents damage to LEDs.
  • Adjustable switching frequency enables optimization for different operating conditions.
  • Internal protection features such as over-temperature and over-current protection enhance reliability and safety.

Advantages and Disadvantages

Advantages: - High voltage capability allows for direct connection to high-voltage power sources. - Efficient power management results in reduced energy consumption and increased overall system efficiency. - Compact package size enables space-saving designs in LED lighting applications.

Disadvantages: - Limited output current range may not be suitable for high-power LED applications. - Non-isolated design may require additional circuitry for safety in certain applications.

Working Principles

The LM3402HVMM operates as a step-down constant current LED driver. It uses a buck converter topology to regulate the output current based on the feedback signal received from the FB pin. The internal control circuitry adjusts the duty cycle of the switching transistor to maintain a constant current through the connected LEDs, regardless of input voltage variations.

Detailed Application Field Plans

The LM3402HVMM is commonly used in various LED lighting applications, including: - Indoor and outdoor lighting fixtures - Automotive lighting systems - Streetlights and area lighting - Display backlighting - Signage and decorative lighting

Detailed and Complete Alternative Models

  1. LM3402: Similar to LM3402HVMM but with a lower maximum input voltage range (up to 40V).
  2. LM3403: Step-down constant current LED driver with a higher output current range (up to 3A).
  3. LM3410: Buck-boost constant current LED driver suitable for both step-up and step-down applications.

These alternative models offer different specifications and features to cater to specific requirements in LED lighting systems.

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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi LM3402HVMM dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of LM3402HVMM in technical solutions:

  1. Q: What is LM3402HVMM? A: LM3402HVMM is a high-voltage, buck regulator integrated circuit (IC) that is commonly used for driving high-power LEDs.

  2. Q: What is the input voltage range of LM3402HVMM? A: The input voltage range of LM3402HVMM is typically between 4.5V and 75V.

  3. Q: What is the output current capability of LM3402HVMM? A: LM3402HVMM can deliver a maximum output current of up to 1A.

  4. Q: Can LM3402HVMM be used for dimming LED lights? A: Yes, LM3402HVMM supports pulse-width modulation (PWM) dimming, making it suitable for controlling LED brightness.

  5. Q: Is LM3402HVMM suitable for automotive applications? A: Yes, LM3402HVMM is designed to operate in harsh automotive environments and can handle wide temperature ranges.

  6. Q: Does LM3402HVMM have built-in protection features? A: Yes, LM3402HVMM includes features like thermal shutdown, overcurrent protection, and open/shorted LED protection.

  7. Q: Can LM3402HVMM be used in both step-up and step-down configurations? A: No, LM3402HVMM is specifically designed for step-down (buck) applications only.

  8. Q: What is the typical efficiency of LM3402HVMM? A: LM3402HVMM has a typical efficiency of around 90%, making it highly efficient for LED lighting applications.

  9. Q: Can LM3402HVMM be used in parallel to drive multiple LEDs? A: Yes, LM3402HVMM can be connected in parallel to drive multiple LEDs, as long as the total current does not exceed its maximum rating.

  10. Q: Are there any application notes or reference designs available for LM3402HVMM? A: Yes, Texas Instruments provides application notes and reference designs that can help with the implementation of LM3402HVMM in various lighting applications.

Please note that these answers are general and may vary depending on specific design considerations and requirements.