LT3519IMS-1#PBF

Product Overview

Category

The LT3519IMS-1#PBF belongs to the category of integrated circuits (ICs) specifically designed for LED lighting applications.

Use

This product is primarily used for driving and controlling LEDs in various lighting systems, including automotive, industrial, and general lighting applications.

Characteristics

• High efficiency: The LT3519IMS-1#PBF offers high efficiency power conversion, resulting in reduced power consumption and improved energy efficiency.
• Wide input voltage range: It can operate with a wide input voltage range, making it suitable for different power supply configurations.
• Dimming control: The IC provides flexible dimming control options, allowing users to adjust the brightness of the LEDs according to their requirements.
• Protection features: The LT3519IMS-1#PBF incorporates various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring the safety and reliability of the LED lighting system.

Package

The LT3519IMS-1#PBF is available in a small and compact MSOP-16 package, which facilitates easy integration into space-constrained designs.

Essence

The essence of the LT3519IMS-1#PBF lies in its ability to efficiently drive and control LEDs, enabling the creation of high-performance lighting systems with enhanced energy efficiency and flexibility.

Packaging/Quantity

The LT3519IMS-1#PBF is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Current: Up to 1A
• Switching Frequency: Adjustable up to 2MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to 125°C
• Package Type: MSOP-16

Detailed Pin Configuration

The LT3519IMS-1#PBF features a 16-pin MSOP package with the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. VCC: Supply voltage for internal circuitry
4. SW: Switch node connection
5. LX: Inductor connection
6. FB: Feedback voltage input
7. RT: External resistor for setting switching frequency
8. CT: External capacitor for setting soft-start time
9. DIM: Dimming control input
10. EN/UVLO: Enable/Undervoltage lockout
11. SS/TRK: Soft-start/Tracking control
12. SYNC: Synchronization input
13. PGND: Power ground
14. ISET: Current sense input
15. VOUT: Output voltage
16. COMP: Compensation node

Functional Features

• High-efficiency step-up LED driver
• Wide input voltage range for versatile applications
• Adjustable switching frequency for optimization
• Analog or PWM dimming control options
• Integrated protection features for enhanced reliability
• Soft-start and tracking control for smooth operation
• Synchronization capability for multi-channel applications

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power consumption
• Wide input voltage range allows for flexible power supply configurations
• Dimming control options provide brightness adjustment flexibility
• Integrated protection features ensure system safety and reliability
• Compact package facilitates space-constrained designs

Disadvantages

• Limited output current capacity (up to 1A)
• Requires external components for proper operation
• Relatively high cost compared to some alternative models

Working Principles

The LT3519IMS-1#PBF operates as a high-efficiency step-up LED driver. It utilizes a boost converter topology to convert the input voltage to a higher output voltage suitable for driving LEDs. The IC incorporates a control loop that regulates the output current to maintain consistent LED brightness.

The dimming control feature allows users to adjust the LED brightness by modulating the duty cycle of the PWM signal or varying the analog input voltage. The LT3519IMS-1#PBF also includes protection features such as overvoltage, overcurrent, and thermal shutdown, ensuring safe operation under various conditions.

Detailed Application Field Plans

The LT3519IMS-1#PBF finds applications in various fields, including:

1. Automotive lighting: Used for interior and exterior automotive lighting systems, such as headlights, taillights, and dashboard illumination.
2. Industrial lighting: Suitable for industrial lighting applications, including warehouse lighting, street lighting, and high-bay lighting.
3. General lighting: Can be employed in general lighting fixtures like downlights, track lights, and architectural lighting.

Detailed and Complete Alternative Models

1. LT3518IMS-1#PBF: Similar to LT3519IMS-1#PBF but with a lower output current capacity (up to 500mA).
2. LT351