LT3796HFE#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Wide Input Voltage Range, Dimming Control
• Package: 28-Lead TSSOP
• Essence: Power Management IC for LED Lighting Applications
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Current: Up to 60mA
• Switching Frequency: 200kHz to 2MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3796HFE#TRPBF has a total of 28 pins. The pin configuration is as follows:

1. VIN: Input Voltage
2. VCC: Supply Voltage
3. GND: Ground
4. SW: Switch Node Connection
5. FB: Feedback Pin
6. RT/CLK: Timing Resistor/Clock Synchronization
7. SYNC/MODE: External Clock Synchronization/Mode Selection
8. SS/TRK: Soft-Start/Tracking
9. ITH: Current Sense Threshold
10. ADJ: Output Voltage Adjustment
11. EN/UVLO: Enable/Input Undervoltage Lockout
12. PG: Power Good Indicator
13. LX: Inductor Connection
14. LX: Inductor Connection
15. LX: Inductor Connection
16. LX: Inductor Connection
17. LX: Inductor Connection
18. LX: Inductor Connection
19. LX: Inductor Connection
20. LX: Inductor Connection
21. LX: Inductor Connection
22. LX: Inductor Connection
23. LX: Inductor Connection
24. LX: Inductor Connection
25. LX: Inductor Connection
26. LX: Inductor Connection
27. LX: Inductor Connection
28. LX: Inductor Connection

Functional Features

• High Efficiency LED Driver
• Wide Input Voltage Range for Versatile Applications
• Dimming Control for Adjustable Brightness
• Internal Compensation Simplifies Design
• Programmable Soft-Start and Tracking
• Power Good Indicator for System Monitoring
• External Clock Synchronization Capability
• Overvoltage and Overtemperature Protection

Advantages and Disadvantages

Advantages

• High efficiency results in energy savings
• Wide input voltage range allows for flexibility in different applications
• Dimming control enables adjustable brightness levels
• Simplified design with internal compensation
• Programmable soft-start and tracking for smooth operation
• Power good indicator ensures system reliability
• External clock synchronization capability for precise timing
• Protection features safeguard against overvoltage and overtemperature conditions

Disadvantages

• Limited output current of up to 60mA may not be suitable for high-power LED applications
• Requires careful thermal management due to operating temperature range limitations

Working Principles

The LT3796HFE#TRPBF is a power management IC specifically designed for LED lighting applications. It operates by converting the input voltage into a regulated output current to drive LEDs. The IC utilizes a high-efficiency switching regulator topology to achieve maximum power conversion efficiency.

The device incorporates various control features such as analog or PWM dimming control, soft-start, and tracking. These features allow for precise control of the LED brightness and ensure smooth operation during startup. The LT3796HFE#TRPBF also includes internal compensation circuitry, simplifying the design process for the user.

To protect the system, the IC offers overvoltage and overtemperature protection mechanisms. These safeguards prevent damage to the LEDs and the IC itself in case of abnormal operating conditions.

Detailed Application Field Plans

The LT3796HFE#TRPBF is suitable for a wide range of LED lighting applications, including:

1. General Lighting: Residential, commercial, and industrial lighting solutions.
2. Automotive Lighting: Interior and exterior lighting in vehicles.
3. Display Backlighting: LCD panel backlighting for TVs, monitors, and signage.
4. Street Lighting: Energy-efficient lighting for streets and highways.
5. Architectural Lighting: Illumination of buildings, bridges, and landmarks.
6. Horticultural Lighting: Indoor plant growth and cultivation systems.

Detailed and Complete Alternative Models

• LT3796A: Similar functionality with additional features for specific applications.
• LT3763: Lower output current capability but higher input voltage range.
• LT3952: Higher output current capability with similar input voltage range.

These alternative models offer different specifications and features, allowing users to choose the most suitable option based on their specific requirements.

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