LT3791IFE-1

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LT3791IFE-1

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IC REGULATOR

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正品保證

規格

屬性 價值
Part Status Obsolete
Output Type Transistor Driver
Function Step-Up/Step-Down
Output Configuration Positive
Topology Buck-Boost
Number of Outputs 2
Output Phases 2
Voltage - Supply (Vcc/Vdd) 4.7V ~ 60V
Frequency - Switching 200kHz ~ 700kHz
Synchronous Rectifier Yes
Clock Sync Yes
Control Features Enable, Frequency Control, Soft Start
Operating Temperature -40°C ~ 125°C
Mounting Type Surface Mount
Package / Case 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package 38-TSSOP-EP
Base Product Number LT3791

概述

Description

The LT3791IFE-1 is a high-performance voltage mode controller designed for LED lighting applications. It operates as a constant current source and features a wide input voltage range, making it suitable for various power supply designs. Key specifications include a programmable switching frequency, output voltage monitoring, and an integrated high-side current sense amplifier, which enhances efficiency and reliability.
The controller supports both step-down (buck) and step-up (boost) configurations, allowing for versatile applications in driving LED strings. The LT3791IFE-1 also includes features such as thermal shutdown, overvoltage protection, and soft-start to prevent inrush current during startup.
This device is typically used in automotive, industrial, and consumer lighting solutions, where precise control over LED brightness and power efficiency is crucial. Its compact package and ease of use make it a popular choice among designers looking to implement reliable LED lighting solutions.

Equivalent

The LT3791IFE-1 is a high voltage LED driver from Analog Devices. Equivalent products include the Texas Instruments TPS92630, ON Semiconductor NCL30051, and the Maxim Integrated MAX16832. These alternatives provide similar functionalities for driving LED loads and can be considered based on specific application requirements, such as input voltage range, output current, and control features. Always verify compatibility with your design specifications before making a substitution.

Features

The LT3791IFE-1 is a high-performance LED driver from Analog Devices, designed for constant current applications. Key features include:
1. Wide Input Voltage Range: Operates from 4.5V to 60V, accommodating various power sources.
2. Constant Current Control: Provides precise LED current regulation, enhancing performance and efficiency.
3. Adjustable Frequency: Switching frequency can be set between 100 kHz to 1 MHz, allowing flexibility in design.
4. High Efficiency: Achieves up to 95% efficiency, minimizing heat generation and improving reliability.
5. Integrated Compensation: Built-in compensation simplifies circuit design and enhances stability.
6. PWM Dimming: Supports PWM dimming for adjustable brightness with minimal flicker.
7. Thermal Protection: Features thermal shutdown to prevent overheating.
8. Flexible Output Configurations: Allows for single or multiple LED string configurations.
Overall, the LT3791IFE-1 is ideal for driving high-brightness LEDs in applications like automotive lighting, architectural lighting, and industrial displays.

Pinout

The LT3791IFE-1 is a high-performance LED driver IC with a total pin count of 16. It is designed for driving high-brightness LEDs in applications such as automotive lighting, street lights, and architectural lighting.
Key functions of the LT3791IFE-1 include:
1. Constant Current Control: Maintains a consistent LED current for uniform brightness.
2. Boost Converter Operation: Capable of stepping up the input voltage to drive LEDs effectively.
3. PWM Dimming: Supports pulse-width modulation for adjustable brightness levels.
4. Thermal Regulation: Protects the LED from overheating by adjusting the output current based on temperature.
5. Wide Input Voltage Range: Accepts input voltages from 4.5V to 60V.
6. Multiple LED Support: Configurable for driving multiple strings of LEDs.
Overall, the LT3791IFE-1 is optimized for high efficiency and performance in LED applications.

Manufacturer

The LT3791IFE-1 is manufactured by Analog Devices, Inc. Analog Devices is a global leader in the design and manufacturing of high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits. Founded in 1965 and headquartered in Norwood, Massachusetts, the company serves a diverse range of industries, including industrial automation, automotive, communications, healthcare, and consumer electronics.
Analog Devices specializes in providing solutions for signal processing applications, enabling customers to achieve high levels of performance and efficiency in their circuits. The LT3791IFE-1 specifically is a high-performance LED driver designed for applications such as automotive lighting and general illumination, showcasing the company’s focus on high-tech and innovative electronic solutions.

Application

The LT3791IFE-1 is a versatile LED driver primarily used in applications such as architectural lighting, automotive lighting, and industrial lighting. It is designed for high-efficiency constant current control, making it suitable for driving high-power LED arrays. Additionally, it can be implemented in backlighting for displays, stage lighting, and street lighting systems. Its features enable dimming capabilities and support for various topologies, including boost, buck, and buck-boost configurations, enhancing its applicability across diverse lighting solutions.

Package

The LT3791IFE-1 is packaged in a 16-lead thermally enhanced TSSOP (Thin Shrink Small Outline Package). This package type is designed for efficient heat dissipation and compact design in electronic applications.

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