LT3762HUFD#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High efficiency, wide input voltage range, compact package
• Package: 28-Lead QFN
• Essence: Power management solution for driving high-power LEDs
• Packaging/Quantity: Tape & Reel, 250 units per reel

Specifications

• Input Voltage Range: 4V to 60V
• Output Current: Up to 20A
• Switching Frequency: Up to 1MHz
• Dimming Control: Analog/PWM
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3762HUFD#TRPBF IC has a total of 28 pins. The pin configuration is as follows:

1. VIN: Input voltage
2. VCC: Supply voltage for internal circuitry
3. GND: Ground
4. SW: Switch node connection
5. FB: Feedback pin for regulating output voltage
6. CTRL: Control pin for dimming and shutdown
7. SYNC: Synchronization input for multiple ICs
8. RT: Timing resistor for setting switching frequency
9. COMP: Compensation pin for stability control
10. SS: Soft-start capacitor connection
11. PGND: Power ground
12. ITH: Current sense threshold pin
13. ADJ: Adjust pin for output voltage regulation
14. VOUT: Output voltage

Functional Features

• Wide input voltage range allows for versatile applications
• High efficiency ensures minimal power loss
• Flexible dimming control options for precise lighting control
• Synchronization capability enables parallel operation of multiple ICs
• Comprehensive protection features including overvoltage, overcurrent, and thermal shutdown

Advantages and Disadvantages

Advantages: - High efficiency leads to energy savings - Wide input voltage range accommodates various power sources - Compact package size saves board space - Flexible dimming control options provide customization

Disadvantages: - Limited maximum output current compared to some other LED drivers - Requires external components for proper operation

Working Principles

The LT3762HUFD#TRPBF is a step-down DC/DC converter specifically designed for driving high-power LEDs. It utilizes a constant current mode architecture to regulate the LED current accurately. The IC operates by converting the input voltage to a lower output voltage while maintaining a constant current through the LEDs.

The device incorporates a high-side current sense amplifier and an internal low-side N-channel MOSFET switch. It also features a feedback loop that adjusts the duty cycle of the switch to maintain the desired LED current. Dimming control can be achieved through analog or PWM signals applied to the CTRL pin.

Detailed Application Field Plans

The LT3762HUFD#TRPBF LED driver IC finds applications in various fields, including:

1. Automotive lighting: Enables efficient and reliable LED lighting systems in vehicles.
2. Industrial lighting: Provides high-power LED driving solutions for industrial environments.
3. Architectural lighting: Offers precise control and dimming capabilities for architectural lighting installations.
4. Outdoor lighting: Facilitates energy-efficient LED lighting in outdoor applications such as streetlights and parking lots.
5. Display backlighting: Drives LED backlights in LCD displays for enhanced brightness and color accuracy.

Detailed and Complete Alternative Models

1. LT3799: Similar LED driver IC with higher maximum output current capability.
2. LT3763: Step-up/step-down LED driver IC suitable for applications requiring both higher and lower output voltages.
3. LT3952: LED matrix driver IC designed for driving multiple strings of LEDs with individual dimming control.

These alternative models offer different features and specifications to cater to specific application requirements.

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