LT3798IMSE#TRPBF

Product Overview

Category

The LT3798IMSE#TRPBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power management systems, including LED lighting, automotive lighting, and general-purpose lighting applications.

Characteristics

• High efficiency: The LT3798IMSE#TRPBF offers high efficiency power conversion, making it suitable for energy-efficient applications.
• Wide input voltage range: It can operate with a wide input voltage range, allowing flexibility in different power supply configurations.
• Dimming control: The IC provides dimming control capabilities, enabling precise control over the brightness of connected lighting systems.
• Protection features: It incorporates various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe operation under different conditions.

Package

The LT3798IMSE#TRPBF is available in a small MSOP-16 package, which offers compactness and ease of integration into different circuit designs.

Essence

The essence of LT3798IMSE#TRPBF lies in its ability to efficiently manage power in lighting applications, providing reliable and flexible solutions for various lighting systems.

Packaging/Quantity

The IC is typically supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: 0.2V to 100V
• Maximum Switching Frequency: 1MHz
• Maximum Output Current: 3A
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3798IMSE#TRPBF has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. VIN: Input voltage pin
2. GND: Ground pin
3. VCC: Power supply pin
4. FB: Feedback pin for regulating output voltage
5. COMP: Compensation pin for stability control
6. RT/CLK: External resistor or clock input pin
7. SYNC/EXTVCC: Synchronization or external VCC input pin
8. SS/TRISET: Soft-start/tri-state control pin
9. LX: Switching node pin
10. SW: Switching node pin
11. PGND: Power ground pin
12. AGND: Analog ground pin
13. ADJ: Adjustable pin for dimming control
14. CTRL: Control pin for various functions
15. PWM: Pulse width modulation input pin
16. INTVCC: Internal VCC pin

Functional Features

• High-efficiency synchronous buck-boost converter
• Wide input voltage range for versatile applications
• Dimming control through adjustable pin or PWM input
• Integrated protection features for safe operation
• Programmable switching frequency for optimization

Advantages and Disadvantages

Advantages

• High efficiency leads to energy savings
• Wide input voltage range allows flexibility in power supply configurations
• Dimming control enables precise brightness adjustment
• Compact package facilitates integration into different designs
• Protection features ensure safe operation under various conditions

Disadvantages

• Limited maximum output current of 3A may not be suitable for high-power applications
• Requires careful consideration of thermal management due to the compact package size

Working Principles

The LT3798IMSE#TRPBF operates as a synchronous buck-boost converter, capable of efficiently converting power from a wide input voltage range to a regulated output voltage. It utilizes a combination of internal switches and control circuitry to achieve high conversion efficiency.

The IC incorporates a feedback mechanism that regulates the output voltage based on the input from the FB pin. This feedback loop ensures a stable and accurate output voltage, even under varying load conditions.

The dimming control feature allows for adjusting the brightness of connected lighting systems. This can be achieved either through an adjustable pin or by applying a pulse width modulation (PWM) signal to the PWM pin.

Detailed Application Field Plans

The LT3798IMSE#TRPBF finds extensive application in various fields, including:

1. LED Lighting: The IC is commonly used in LED lighting applications, providing efficient power management and dimming control capabilities.
2. Automotive Lighting: It is utilized in automotive lighting systems, enabling energy-efficient operation and precise brightness adjustment.
3. General-Purpose Lighting: The IC is suitable for general-purpose lighting applications, offering flexibility and reliability in power management.

Detailed and Complete Alternative Models

• LT3798A: Similar to LT3798IMSE#TRPBF, but with additional features such as fault protection and synchronization capabilities.
• LT3798B: A variant of LT3798IMSE#TRPBF, optimized for specific lighting applications, offering enhanced performance and efficiency.