LT3595EUHH#PBF

Product Overview

Category

The LT3595EUHH#PBF belongs to the category of integrated circuits (ICs) used in power management applications.

Use

This IC is specifically designed for driving LEDs (Light Emitting Diodes) and is commonly used in lighting applications.

Characteristics

• High efficiency: The LT3595EUHH#PBF offers high efficiency power conversion, resulting in reduced energy consumption.
• Wide input voltage range: It can operate with input voltages ranging from 3V to 30V, making it suitable for various power sources.
• Adjustable output current: The IC allows for adjustable LED current, providing flexibility in controlling brightness levels.
• Dimming control: It supports both analog and PWM (Pulse Width Modulation) dimming control methods, enabling precise light intensity adjustments.
• Thermal protection: The LT3595EUHH#PBF incorporates thermal shutdown circuitry to prevent damage due to excessive heat.

Package and Quantity

The LT3595EUHH#PBF is available in a compact 20-pin exposed pad QFN (Quad Flat No-Lead) package. It is typically sold in reels containing a specified quantity, such as 2500 units per reel.

Specifications

• Input Voltage Range: 3V to 30V
• Output Current Range: Up to 1A
• Switching Frequency: Adjustable up to 2MHz
• Operating Temperature Range: -40°C to 125°C
• Package Type: 20-pin exposed pad QFN

Pin Configuration

The LT3595EUHH#PBF features a 20-pin configuration with the following pin assignments:

1. VIN: Input voltage pin
2. GND: Ground pin
3. SW: Switch node connection
4. LX: Inductor connection
5. FB: Feedback pin for LED current regulation
6. ADJ: Adjust pin for setting the output voltage
7. VOUT: Output voltage pin
8. EN/UVLO: Enable/Undervoltage Lockout pin
9. SS/TRI: Soft-start/Tri-state control pin
10. PWM: Pulse Width Modulation dimming control pin
11. CTRL1: Control pin 1
12. CTRL2: Control pin 2
13. CTRL3: Control pin 3
14. CTRL4: Control pin 4
15. CTRL5: Control pin 5
16. CTRL6: Control pin 6
17. CTRL7: Control pin 7
18. CTRL8: Control pin 8
19. CTRL9: Control pin 9
20. CTRL10: Control pin 10

Functional Features

• LED Current Regulation: The LT3595EUHH#PBF provides precise regulation of LED current, ensuring consistent brightness levels.
• Dimming Control: It supports both analog and PWM dimming methods, allowing for flexible control of light intensity.
• Overtemperature Protection: The IC incorporates thermal shutdown circuitry to prevent overheating and protect the device.
• Wide Input Voltage Range: The LT3595EUHH#PBF can operate with a wide range of input voltages, making it compatible with various power sources.

Advantages and Disadvantages

Advantages

• High efficiency power conversion reduces energy consumption.
• Adjustable LED current allows for flexible brightness control.
• Supports both analog and PWM dimming methods.
• Thermal protection prevents damage due to excessive heat.
• Wide input voltage range enhances compatibility.

Disadvantages

• Limited to driving LEDs and not suitable for other applications.
• Requires careful consideration of thermal management due to high power dissipation.

Working Principles

The LT3595EUHH#PBF is a step-up DC-DC converter designed to drive LEDs. It utilizes a boost topology to efficiently convert the input voltage to a higher output voltage required for LED operation. The IC regulates the LED current by adjusting the duty cycle of the internal switching transistor.

The LT3595EUHH#PBF incorporates a feedback loop that compares the LED current with a reference voltage, allowing precise regulation. Dimming control is achieved by modulating the duty cycle using either an analog or PWM signal.

Application Field Plans

The LT3595EUHH#PBF finds extensive application in various lighting systems, including: - LED-based automotive lighting - Backlighting for LCD displays - Architectural and decorative lighting - Industrial and commercial lighting - Portable lighting devices

Alternative Models

For those seeking alternative options, the following models can be considered: - LT3590: Similar functionality with adjustable LED current and dimming control. - LT3495: Step-up DC-DC converter with integrated Schottky diode for driving LEDs. - LT3952: High power LED driver with multiple channels and advanced dimming capabilities.

These alternative models offer similar features and can