LT3965IFE#TRPBF

Product Overview

Category

The LT3965IFE#TRPBF belongs to the category of integrated circuits (ICs) specifically designed for LED lighting applications.

Use

This product is primarily used for driving and controlling high-power LEDs in various lighting systems, including automotive, industrial, and architectural lighting.

Characteristics

• High efficiency: The LT3965IFE#TRPBF offers high efficiency power conversion, resulting in reduced power dissipation and improved energy savings.
• Wide input voltage range: It can operate with input voltages ranging from 4V to 36V, making it suitable for a wide range of applications.
• Dimming control: The IC provides versatile dimming control options, allowing precise adjustment of LED brightness.
• Fault protection: It incorporates comprehensive fault protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

Package

The LT3965IFE#TRPBF is available in a compact 28-lead TSSOP package, which ensures ease of integration into various lighting system designs.

Essence

The essence of the LT3965IFE#TRPBF lies in its ability to efficiently drive and control high-power LEDs, enabling the creation of reliable and energy-efficient lighting solutions.

Packaging/Quantity

This product is typically supplied in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Input Voltage Range: 4V to 36V
• Output Current: Up to 1.5A
• Switching Frequency: Adjustable up to 2MHz
• Dimming Control: Analog, PWM, or I²C
• Operating Temperature Range: -40°C to 125°C
• Package Type: 28-Lead TSSOP

Detailed Pin Configuration

The LT3965IFE#TRPBF features a 28-lead TSSOP package with the following pin configuration:

1. VIN: Input voltage
2. SW: Switch node connection for inductor
3. GND: Ground reference
4. FB: Feedback pin for regulating output voltage
5. VCC: Supply voltage for internal control circuitry
6. CTRL: Dimming control input
7. ISET: Current sense resistor connection
8. EN/UVLO: Enable and undervoltage lockout control
9. AGND: Analog ground reference
10. PWM: Pulse width modulation dimming control input
11. SDA: I²C data line
12. SCL: I²C clock line
13. INTVCC: Internal voltage supply for I²C interface
14. ADJ: Output voltage adjustment
15. LX: Inductor connection
16. PGND: Power ground reference 17-28. NC: No connect

Functional Features

The LT3965IFE#TRPBF offers several functional features that enhance its performance and usability in LED lighting applications:

1. High-efficiency buck mode operation for optimal power conversion.
2. Versatile dimming control options, including analog, PWM, or I²C, allowing precise adjustment of LED brightness.
3. Comprehensive fault protection mechanisms, such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring system reliability.
4. Wide input voltage range enables compatibility with various power sources.
5. Adjustable switching frequency up to 2MHz, providing flexibility in design.

Advantages and Disadvantages

Advantages

• High efficiency power conversion reduces power dissipation and improves energy savings.
• Versatile dimming control options enable precise adjustment of LED brightness.
• Comprehensive fault protection mechanisms ensure system reliability.
• Wide input voltage range allows compatibility with various power sources.

Disadvantages

• Limited to driving and controlling high-power LEDs, not suitable for low-power LED applications.
• Requires careful thermal management due to high power dissipation.

Working Principles

The LT3965IFE#TRPBF operates based on a buck mode switching regulator topology. It converts the input voltage to a lower regulated output voltage required for driving high-power LEDs. The IC utilizes a feedback mechanism to regulate the output voltage and provides dimming control options to adjust the LED brightness. Comprehensive fault protection features ensure safe operation under various conditions.

Detailed Application Field Plans

The LT3965IFE#TRPBF finds extensive application in the following fields:

1. Automotive lighting: Used for driving and controlling high-power LEDs in automotive headlights, taillights, and interior lighting systems.
2. Industrial lighting: Enables efficient illumination in industrial settings, such as warehouses, factories, and outdoor areas.
3. Architectural lighting: Provides precise control over LED brightness in architectural lighting installations, including building facades, bridges, and monuments.

Detailed and Complete Alternative Models

1. LT3799: A similar IC from Linear Technology that offers higher output current capability and additional features for more demanding LED lighting applications.