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LT3797IUKG#TRPBF
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LT3797IUKG#TRPBF

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: LED Driver
  • Characteristics: High Efficiency, Wide Input Voltage Range, Dimming Control
  • Package: 38-Lead 5mm × 7mm QFN
  • Essence: Power Management IC for LED Lighting Applications
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 4.5V to 100V
  • Output Current: Up to 60mA
  • Switching Frequency: 200kHz to 2MHz
  • Dimming Control: Analog/PWM
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

  1. VIN: Input Voltage
  2. GND: Ground
  3. VCC: Supply Voltage for Internal Circuitry
  4. BST: Boost Regulator Output
  5. SW: Switch Node Connection
  6. FB: Feedback Pin for Regulation
  7. CTRL: Dimming Control Input
  8. EN/UVLO: Enable/Input Undervoltage Lockout
  9. RT: Timing Resistor for Oscillator Frequency
  10. AGND: Analog Ground
  11. ISET: LED Current Setting
  12. LX: Inductor Connection
  13. PGND: Power Ground
  14. VOUT: Output Voltage
  15. ADJ: Output Voltage Adjustment
  16. SYNC: Synchronization Input
  17. CLKOUT: Clock Output
  18. SS/TRK: Soft-Start/Tracking
  19. OVLO: Overvoltage Lockout
  20. OCSET: Overcurrent Protection Threshold

Functional Features

  • High efficiency LED driver with wide input voltage range
  • Supports analog and PWM dimming control methods
  • Integrated boost regulator for driving high-power LEDs
  • Adjustable output voltage and current settings
  • Overvoltage and overcurrent protection
  • Synchronization input for multi-device operation
  • Soft-start and tracking for controlled startup

Advantages and Disadvantages

Advantages

  • High efficiency design reduces power consumption
  • Wide input voltage range allows for versatile applications
  • Dimming control options provide flexibility in lighting scenarios
  • Integrated boost regulator simplifies circuit design
  • Overvoltage and overcurrent protection enhance system reliability
  • Synchronization input enables synchronized operation of multiple devices
  • Soft-start feature prevents excessive inrush current during startup

Disadvantages

  • Limited maximum output current (up to 60mA)
  • Requires external components for complete LED driver solution
  • Higher cost compared to non-integrated LED driver solutions

Working Principles

The LT3797IUKG#TRPBF is a power management IC specifically designed for LED lighting applications. It operates by converting the input voltage into a regulated output voltage suitable for driving LEDs. The integrated boost regulator efficiently steps up the input voltage to the desired level, while the feedback pin (FB) ensures stable regulation.

The dimming control input (CTRL) allows for analog or PWM dimming, enabling brightness adjustment of the connected LEDs. The device also features overvoltage lockout (OVLO) and overcurrent protection (OCSET) to safeguard against potential faults or abnormal operating conditions.

During startup, the soft-start feature (SS/TRK) gradually ramps up the output voltage, preventing excessive inrush current that could damage the LEDs. The synchronization input (SYNC) facilitates the synchronization of multiple LT3797IUKG#TRPBF devices, ensuring coordinated operation in larger lighting systems.

Detailed Application Field Plans

The LT3797IUKG#TRPBF is widely used in various LED lighting applications, including:

  1. Indoor and outdoor lighting fixtures
  2. Automotive lighting systems
  3. Streetlights and area lighting
  4. Architectural and decorative lighting
  5. Signage and display lighting
  6. Backlighting for LCD panels
  7. Emergency lighting systems
  8. Industrial and commercial lighting

Detailed and Complete Alternative Models

  1. LT3796: Similar LED driver IC with higher output current capability (up to 100mA)
  2. LT3763: LED driver IC with integrated buck-boost topology for wider input voltage range
  3. LT3957: Multi-channel LED driver IC for driving multiple strings of LEDs simultaneously
  4. LT3496: LED driver IC with integrated power factor correction (PFC) for improved efficiency
  5. LT3599: LED driver IC with integrated RGB color mixing capabilities

(Note: The above alternative models are provided as examples and may not cover all available options in the market.)

This encyclopedia entry provides a comprehensive overview of the LT3797IUKG#TRPBF LED driver IC, including its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field

Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LT3797IUKG#TRPBF i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of LT3797IUKG#TRPBF in technical solutions:

  1. Q: What is the LT3797IUKG#TRPBF? A: The LT3797IUKG#TRPBF is a high voltage synchronous step-down LED driver/controller IC designed for driving LEDs in various lighting applications.

  2. Q: What is the input voltage range of the LT3797IUKG#TRPBF? A: The LT3797IUKG#TRPBF can operate with an input voltage range from 4.5V to 100V.

  3. Q: Can the LT3797IUKG#TRPBF drive multiple LEDs? A: Yes, the LT3797IUKG#TRPBF can drive multiple LEDs by connecting them in series or parallel configurations.

  4. Q: What is the maximum output current of the LT3797IUKG#TRPBF? A: The LT3797IUKG#TRPBF can deliver up to 100mA of output current.

  5. Q: Is the LT3797IUKG#TRPBF suitable for dimming LED lights? A: Yes, the LT3797IUKG#TRPBF supports both analog and PWM dimming methods for controlling LED brightness.

  6. Q: Can the LT3797IUKG#TRPBF handle thermal management? A: Yes, the LT3797IUKG#TRPBF has built-in thermal shutdown and over-temperature protection features to ensure safe operation.

  7. Q: Does the LT3797IUKG#TRPBF have any fault detection capabilities? A: Yes, the LT3797IUKG#TRPBF provides fault detection for open and shorted LED strings, as well as input undervoltage lockout.

  8. Q: Can the LT3797IUKG#TRPBF be used in automotive lighting applications? A: Yes, the LT3797IUKG#TRPBF is suitable for automotive lighting due to its wide input voltage range and robust features.

  9. Q: What is the efficiency of the LT3797IUKG#TRPBF? A: The LT3797IUKG#TRPBF offers high efficiency operation, typically above 90%, which helps minimize power dissipation.

  10. Q: Are there any evaluation boards or reference designs available for the LT3797IUKG#TRPBF? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs to help users get started with the LT3797IUKG#TRPBF in their applications.

Please note that the answers provided here are general and may vary depending on specific application requirements. It's always recommended to refer to the datasheet and application notes for detailed information.