LT3798IMSE#PBF

Product Overview

Category

The LT3798IMSE#PBF belongs to the category of integrated circuits (ICs) used in power management applications.

Use

This IC is specifically designed for driving and controlling LED lighting systems.

Characteristics

• High efficiency: The LT3798IMSE#PBF offers high efficiency power conversion, making it suitable for energy-efficient LED lighting solutions.
• Versatility: It supports a wide input voltage range, allowing it to be used in various lighting applications.
• Dimming control: The IC provides flexible dimming control options, enabling precise adjustment of light output.
• Protection features: It incorporates several protection features such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe operation of the LED lighting system.

Package

The LT3798IMSE#PBF is available in a small MSOP-16 package, which facilitates easy integration into compact lighting designs.

Essence

The essence of the LT3798IMSE#PBF lies in its ability to efficiently drive and control LED lighting systems, providing reliable and versatile performance.

Packaging/Quantity

This IC is typically supplied in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: Up to 80V
• Maximum Switching Frequency: 1MHz
• Operating Temperature Range: -40°C to 125°C
• Control Interface: Analog/PWM

Detailed Pin Configuration

The LT3798IMSE#PBF has a total of 16 pins, each serving a specific function. Here is the detailed pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. VCC: Supply voltage pin
4. FB: Feedback pin for regulating output voltage
5. RT/CLK: External resistor/clock input for setting switching frequency
6. CT: Timing capacitor pin for setting the oscillator frequency
7. SW: Switch node connection for driving external power switch
8. LX: Inductor connection pin
9. GATE: Gate drive output for external N-channel MOSFET
10. VREF: Reference voltage output pin
11. COMP: Compensation pin for stability control
12. DIM: Dimming control input pin
13. ADJ: Output voltage adjustment pin
14. SYNC: Synchronization input pin
15. SS: Soft-start pin for controlling startup behavior
16. PGND: Power ground pin

Functional Features

• Wide Input Voltage Range: The LT3798IMSE#PBF can handle a wide range of input voltages, making it suitable for various lighting applications.
• High Efficiency: It offers high efficiency power conversion, reducing energy consumption and heat dissipation.
• Flexible Dimming Control: The IC supports various dimming control methods, including analog and PWM dimming, allowing precise adjustment of light output.
• Protection Mechanisms: It incorporates protection features such as overvoltage, overcurrent, and thermal shutdown, ensuring safe operation and preventing damage to the LED lighting system.
• Compact Package: The MSOP-16 package enables easy integration into space-constrained lighting designs.

Advantages and Disadvantages

Advantages

• High efficiency power conversion
• Versatile dimming control options
• Wide input voltage range
• Compact package size
• Comprehensive protection features

Disadvantages

• Limited maximum output voltage (up to 80V)
• Requires external components for operation

Working Principles

The LT3798IMSE#PBF operates on the principle of a buck-boost converter. It regulates the output voltage by adjusting the duty cycle of the internal power switch. The IC uses a feedback mechanism to compare the actual output voltage with the desired value and adjusts the duty cycle accordingly. This control loop ensures stable and accurate regulation of the LED lighting system.

Detailed Application Field Plans

The LT3798IMSE#PBF finds applications in various LED lighting systems, including: - Indoor and outdoor lighting - Automotive lighting - Architectural lighting - Signage and display lighting - Industrial lighting

Detailed and Complete Alternative Models

1. LT3798EMSE#PBF: Similar to LT3798IMSE#PBF but with extended temperature range (-40°C to 150°C).
2. LT3798HMSE#PBF: Higher maximum switching frequency (up to 2MHz) for faster response times.
3. LT3798IMSE#TRPBF: Tape and reel packaging option for automated assembly.

These alternative models offer similar functionality and can be considered as alternatives to the LT3798IMSE#PBF based on specific application requirements.

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