Linear Technology/QD Devices
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LT3797ILXE#PBF
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LT3797ILXE#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: LED Driver

Characteristics: - High efficiency - Wide input voltage range - Dimming control - Fault protection features

Package: LX Package (5mm x 6mm)

Essence: The LT3797ILXE#PBF is a high-efficiency LED driver IC designed for driving LEDs in various lighting applications.

Packaging/Quantity: Available in tape and reel packaging, with 1,000 units per reel.

Specifications

  • Input Voltage Range: 4.5V to 100V
  • Output Current: Up to 100mA
  • Switching Frequency: Up to 2MHz
  • Dimming Control: Analog/PWM
  • Fault Protection Features: Overvoltage, overcurrent, and overtemperature protection

Detailed Pin Configuration

The LT3797ILXE#PBF has the following pin configuration:

  1. VIN: Input voltage pin
  2. GND: Ground pin
  3. VCC: Supply voltage pin
  4. DIM: Dimming control pin
  5. FB: Feedback pin
  6. EN: Enable pin
  7. SW: Switch node pin
  8. LX: Inductor connection pin
  9. CTRL: Control pin

Functional Features

  • High efficiency conversion of input voltage to drive LEDs
  • Wide input voltage range allows for versatile applications
  • Dimming control enables brightness adjustment
  • Fault protection features ensure safe operation

Advantages and Disadvantages

Advantages: - High efficiency results in energy savings - Wide input voltage range allows for use in various systems - Dimming control provides flexibility in lighting applications - Fault protection features enhance reliability and safety

Disadvantages: - Limited output current may not be suitable for high-power LED applications - Requires external components for operation

Working Principles

The LT3797ILXE#PBF operates as a buck-boost LED driver, converting the input voltage to a suitable level for driving LEDs. It utilizes a high-frequency switching regulator to efficiently control the LED current. The dimming control feature allows for adjusting the brightness of the LEDs.

Detailed Application Field Plans

The LT3797ILXE#PBF is commonly used in the following lighting applications:

  1. Automotive lighting systems
  2. Architectural lighting
  3. Industrial lighting
  4. Signage and display lighting
  5. General illumination

Detailed and Complete Alternative Models

Some alternative models to the LT3797ILXE#PBF include:

  1. LT3760ILXE#PBF
  2. LT3780ILXE#PBF
  3. LT3800ILXE#PBF
  4. LT3810ILXE#PBF

These alternative models offer similar functionality and can be considered based on specific application requirements.

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Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням LT3797ILXE#PBF у технічних рішеннях

Sure! Here are 10 common questions and answers related to the application of LT3797ILXE#PBF in technical solutions:

  1. Q: What is the LT3797ILXE#PBF? A: The LT3797ILXE#PBF is a high voltage, synchronous, current mode LED driver IC designed for driving LEDs in various lighting applications.

  2. Q: What is the input voltage range of the LT3797ILXE#PBF? A: The LT3797ILXE#PBF can operate with an input voltage range from 4.5V to 100V.

  3. Q: How many LEDs can the LT3797ILXE#PBF drive? A: The LT3797ILXE#PBF can drive up to 20 LEDs in series.

  4. Q: Can the LT3797ILXE#PBF dim the LEDs? A: Yes, the LT3797ILXE#PBF supports both analog and PWM dimming control methods.

  5. Q: What is the maximum output current of the LT3797ILXE#PBF? A: The LT3797ILXE#PBF can deliver a maximum output current of 1.5A.

  6. Q: Does the LT3797ILXE#PBF have any built-in protection features? A: Yes, the LT3797ILXE#PBF includes features like overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.

  7. Q: Can the LT3797ILXE#PBF be used in automotive applications? A: Yes, the LT3797ILXE#PBF is suitable for automotive lighting applications as it can handle wide input voltage variations.

  8. Q: Is there any reference design available for the LT3797ILXE#PBF? A: Yes, Linear Technology (now part of Analog Devices) provides reference designs and application notes for the LT3797ILXE#PBF on their website.

  9. Q: What is the efficiency of the LT3797ILXE#PBF? A: The LT3797ILXE#PBF has high efficiency, typically above 90%, which helps in reducing power dissipation and improving overall system performance.

  10. Q: Can the LT3797ILXE#PBF be used in non-LED lighting applications? A: While the LT3797ILXE#PBF is primarily designed for LED lighting, it can also be used in other applications that require high voltage, synchronous current mode control.