LT3476EUHF#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Wide Input Voltage Range, Adjustable Output Current, Dimming Control
• Package: 16-Lead QFN
• Essence: Power Management IC for LED Lighting Applications
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 3V to 40V
• Output Current: Up to 1.5A
• Switching Frequency: 200kHz to 2MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3476EUHF#TRPBF has a 16-lead QFN package with the following pin configuration:

1. VIN: Input Voltage
2. SW: Switch Node Connection
3. GND: Ground
4. FB: Feedback Pin
5. CTRL: Dimming Control Input
6. VCC: Supply Voltage for Internal Circuitry
7. EN/UVLO: Enable/Input Undervoltage Lockout
8. SS: Soft-Start Pin
9. PGND: Power Ground
10. LX: Inductor Connection
11. LX: Inductor Connection
12. LX: Inductor Connection
13. LX: Inductor Connection
14. LX: Inductor Connection
15. LX: Inductor Connection
16. LX: Inductor Connection

Functional Features

• High efficiency synchronous step-down LED driver
• Wide input voltage range allows operation from various power sources
• Adjustable output current enables flexibility in LED brightness control
• Dimming control options for analog or PWM dimming
• Internal compensation simplifies external component count
• Integrated power switch and Schottky diode for compact design

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power consumption and heat generation
• Wide input voltage range allows compatibility with different power sources
• Adjustable output current provides flexibility in LED brightness control
• Dimming control options enable customized lighting effects
• Compact design due to integrated power switch and Schottky diode

Disadvantages

• Limited maximum output current of 1.5A may not be suitable for high-power LED applications
• Requires careful thermal management due to high efficiency and compact design

Working Principles

The LT3476EUHF#TRPBF is a synchronous step-down LED driver that efficiently converts a higher input voltage to a lower output voltage required for driving LEDs. It utilizes a switching regulator topology to achieve high efficiency by minimizing power losses. The input voltage range allows operation from various power sources, making it suitable for a wide range of LED lighting applications.

The adjustable output current feature enables precise control over the LED brightness. The dimming control options, either analog or PWM, allow further customization of the lighting effects. The internal compensation simplifies the external component count, reducing the overall system complexity.

Detailed Application Field Plans

The LT3476EUHF#TRPBF is widely used in various LED lighting applications, including:

1. General Lighting: Indoor and outdoor lighting fixtures, residential and commercial lighting.
2. Automotive Lighting: Headlights, taillights, interior lighting.
3. Display Backlighting: LCD monitors, TVs, signage.
4. Architectural Lighting: Accent lighting, landscape lighting.
5. Industrial Lighting: Warehouse lighting, factory lighting.

Detailed and Complete Alternative Models

1. LT3476EUF#PBF: Similar specifications and features, but with a different package (16-Lead TSSOP).
2. LT3476EUHF#PBF: Similar specifications and features, but with a different package (16-Lead QFN).
3. LT3476EFE#PBF: Lower maximum output current (1A), otherwise similar specifications and features (20-Lead TSSOP).

(Note: The above alternative models are provided for reference and may have slight differences in pin configuration or package.)

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