Linear Technology/QD Devices
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LT3957IUHE

LT3957IUHE

Product Overview

Category

The LT3957IUHE belongs to the category of high voltage, low noise boost converters.

Use

It is used for efficiently driving LEDs with a constant current.

Characteristics

  • High voltage capability
  • Low noise operation
  • Constant current drive for LEDs

Package

The LT3957IUHE comes in a 16-lead thermally enhanced TSSOP package.

Essence

The essence of LT3957IUHE lies in its ability to provide efficient and reliable constant current drive for LEDs.

Packaging/Quantity

The LT3957IUHE is typically available in reels with a quantity of 2500 units per reel.

Specifications

  • Input Voltage Range: 2.8V to 40V
  • Output Voltage Range: Up to 40V
  • Maximum Switch Current: 2A
  • Operating Temperature Range: -40°C to 125°C
  • Dimming Ratio: 3000:1

Detailed Pin Configuration

The LT3957IUHE has a detailed pin configuration as follows: 1. VIN: Input Voltage 2. SW: Switch Node 3. GND: Ground 4. FB: Feedback 5. RT: Timing Resistor 6. ISET: LED Current Set 7. CTRL: Control 8. VCC: Supply Voltage 9. SYNC: Synchronization 10. SS/TRK: Soft-Start/Tracking 11. PG: Power Good 12. COMP: Compensation 13. VOUT: Output Voltage 14. LX: Inductor Connection 15. ADJ: Adjust 16. NC: No Connect

Functional Features

  • Wide input voltage range
  • High efficiency
  • Adjustable LED current
  • Synchronization capability
  • Soft-start and tracking

Advantages and Disadvantages

Advantages

  • High voltage capability
  • Low noise operation
  • Efficient LED current drive
  • Synchronization feature

Disadvantages

  • Limited maximum switch current (2A)

Working Principles

The LT3957IUHE operates by regulating the output current to the connected LEDs through a feedback loop, ensuring consistent and stable illumination.

Detailed Application Field Plans

The LT3957IUHE is well-suited for various applications including: - Automotive lighting - Industrial lighting - Display backlighting - Architectural lighting

Detailed and Complete Alternative Models

Some alternative models to LT3957IUHE include: - LT3958 - LT3959 - LT3960 - LT3961

In conclusion, the LT3957IUHE is a versatile and efficient high voltage, low noise boost converter designed to provide constant current drive for LEDs across various applications.

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기술 솔루션에 LT3957IUHE 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.

  1. What is the input voltage range of LT3957IUHE?

    • The input voltage range of LT3957IUHE is 4.5V to 80V.

  2. What is the maximum output current of LT3957IUHE?

    • The maximum output current of LT3957IUHE is 3A.

  3. Can LT3957IUHE be used in automotive applications?

    • Yes, LT3957IUHE is suitable for automotive applications due to its wide input voltage range and robust design.

  4. What is the switching frequency range of LT3957IUHE?

    • The switching frequency range of LT3957IUHE is 100kHz to 2MHz.

  5. Does LT3957IUHE have built-in protection features?

    • Yes, LT3957IUHE includes various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  6. Is LT3957IUHE suitable for LED driver applications?

    • Yes, LT3957IUHE is commonly used in LED driver applications due to its high efficiency and dimming capabilities.

  7. What type of package does LT3957IUHE come in?

    • LT3957IUHE is available in a 28-lead QFN package.

  8. Can LT3957IUHE be used in industrial power supply designs?

    • Yes, LT3957IUHE is well-suited for industrial power supply designs due to its wide input voltage range and high efficiency.

  9. What is the typical efficiency of LT3957IUHE?

    • The typical efficiency of LT3957IUHE is around 90% depending on the application and operating conditions.

  10. Does LT3957IUHE require external compensation components?

    • No, LT3957IUHE has internal compensation, reducing the need for external compensation components.