LT3762IUFD#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Wide Input Voltage Range, Dimming Control
• Package: 28-Lead QFN
• Essence: Power Management IC for LED Lighting Applications
• Packaging/Quantity: Tape & Reel, 250 units per reel

Specifications

• Input Voltage Range: 4V to 60V
• Output Current Range: Up to 20A
• Switching Frequency: Up to 1MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3762IUFD#PBF has a 28-lead QFN package with the following pin configuration:

1. VIN: Input voltage
2. VCC: Supply voltage for internal circuitry
3. GND: Ground
4. FB: Feedback pin for output voltage regulation
5. ADJ: Adjust pin for setting the output current
6. PWM: Pulse Width Modulation input for dimming control
7. CTRL: Control pin for various functions
8. SYNC: Synchronization input for multiple ICs
9. SS: Soft-start pin for controlled startup
10. PGND: Power ground
11. LX: Switch node connection for external inductor
12. BST: Boost capacitor connection
13. VOUT: Output voltage 14-28: NC (No Connection)

Functional Features

• Wide input voltage range allows operation from various power sources
• High efficiency enables energy savings and reduces heat dissipation
• Dimming control options provide flexibility in lighting applications
• Internal compensation simplifies design and reduces external components
• Synchronization capability allows parallel operation of multiple ICs

Advantages and Disadvantages

Advantages: - High efficiency results in energy savings - Wide input voltage range accommodates different power sources - Dimming control options offer versatility in lighting applications - Internal compensation simplifies design and reduces external components

Disadvantages: - Limited to LED driver applications - Requires careful thermal management due to high power dissipation

Working Principles

The LT3762IUFD#PBF is a high voltage LED driver IC that utilizes a boost topology. It regulates the output current to drive LEDs with constant brightness, regardless of variations in input voltage or LED forward voltage. The IC incorporates a high-side current sense amplifier and an internal compensation network, simplifying the design and reducing the need for external components.

The LT3762IUFD#PBF operates by converting the input voltage to a higher voltage using a boost converter. It then regulates the output current through feedback control, ensuring consistent brightness across the LEDs. The dimming control feature allows adjustment of the LED brightness using either analog or PWM signals.

Detailed Application Field Plans

The LT3762IUFD#PBF is primarily designed for LED lighting applications, including:

1. Indoor and outdoor lighting fixtures
2. Automotive lighting systems
3. Streetlights and area lighting
4. Display backlighting
5. Signage and architectural lighting

Its wide input voltage range, high efficiency, and dimming control make it suitable for various lighting scenarios.

Detailed and Complete Alternative Models

1. LT3799: Similar features and specifications, but with additional fault protection features.
2. LT3762A: Lower cost version with reduced functionality and slightly lower performance.
3. LT3957: Buck-boost LED driver IC with similar characteristics, suitable for different applications.

These alternative models provide options based on specific requirements and budget considerations.

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