LT3595AEUHH#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: The LT3595AEUHH#TRPBF is a versatile step-up DC/DC converter designed for driving multiple LEDs in series. It provides a constant current output, making it ideal for applications requiring precise LED brightness control.

Characteristics: - Input Voltage Range: 3V to 30V - Output Current: Up to 1A - Switching Frequency: 1MHz - Dimming Control: Analog/PWM - Package Type: 24-Lead Exposed Pad QFN - Essence: High-efficiency LED driver with constant current output

Packaging/Quantity: The LT3595AEUHH#TRPBF is available in a 24-Lead Exposed Pad QFN package. It is typically sold in reels of 2500 units.

Specifications

The LT3595AEUHH#TRPBF has the following specifications:

• Input Voltage Range: 3V to 30V
• Output Voltage Range: Up to 40V
• Output Current: Up to 1A
• Switching Frequency: 1MHz
• Dimming Control: Analog or PWM
• Efficiency: Up to 92%
• Operating Temperature Range: -40°C to 125°C
• Package Type: 24-Lead Exposed Pad QFN

Detailed Pin Configuration

The LT3595AEUHH#TRPBF features a 24-Lead Exposed Pad QFN package with the following pin configuration:

1. VIN: Input voltage pin
2. SW: Switch node connection
3. GND: Ground pin
4. FB: Feedback pin for setting the output current
5. CTRL: Dimming control input pin
6. VOUT: Output voltage pin
7. VCC: Internal regulator output pin
8. ADJ: Adjust pin for setting the feedback voltage

Functional Features

The LT3595AEUHH#TRPBF offers several functional features, including:

1. High Efficiency: The converter achieves up to 92% efficiency, minimizing power losses and maximizing battery life.
2. Constant Current Output: It provides a constant current output, ensuring consistent LED brightness even with varying input voltages.
3. Wide Input Voltage Range: The IC can operate from 3V to 30V, making it suitable for a wide range of applications.
4. Dimming Control: The LT3595AEUHH#TRPBF supports both analog and PWM dimming control, allowing precise adjustment of LED brightness.
5. Thermal Protection: The IC incorporates thermal shutdown protection, preventing damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Constant current output ensures consistent LED brightness. - Wide input voltage range allows for versatile application. - Dimming control options provide flexibility in LED brightness adjustment. - Thermal protection prevents overheating and damage.

Disadvantages: - Limited maximum output current of 1A may not be sufficient for high-power LED applications. - Requires external components for proper operation, increasing overall system complexity.

Working Principles

The LT3595AEUHH#TRPBF operates as a step-up DC/DC converter. It uses an internal switch to boost the input voltage to a higher level required for driving multiple LEDs in series. The converter regulates the output current by adjusting the duty cycle of the internal switch.

When the input voltage is applied, the LT3595AEUHH#TRPBF starts switching at a fixed frequency of 1MHz. The feedback pin (FB) monitors the output current and adjusts the duty cycle accordingly to maintain a constant current output. The dimming control input (CTRL) allows for analog or PWM dimming, enabling precise adjustment of LED brightness.

Detailed Application Field Plans

The LT3595AEUHH#TRPBF is well-suited for various applications that require efficient and precise LED driving. Some potential application fields include:

1. Automotive Lighting: The IC can be used in automotive lighting systems, such as headlights, taillights, and interior lighting.
2. Display Backlighting: It is suitable for driving LED backlights in LCD displays, ensuring uniform brightness across the screen.
3. Architectural Lighting: The LT3595AEUHH#TRPBF can be employed in architectural lighting fixtures to achieve desired illumination effects.
4. Portable Devices: It can power LEDs in portable devices like flashlights, portable projectors, and handheld medical devices.

Detailed and Complete Alternative Models

1. LT3595A: Similar to LT3595AEUHH#TRPBF but without exposed pad package option.
2. LT3595B: Improved version with higher maximum output current of 1.5A.
3. LT