LT3964IUHE#PBF

Product Overview

Category

LT3964IUHE#PBF belongs to the category of integrated circuits (ICs).

Use

The LT3964IUHE#PBF is commonly used as a high voltage, high current LED driver. It is designed to drive strings of LEDs with constant current, making it suitable for various lighting applications.

Characteristics

• High voltage and high current capability
• Constant current output for driving LED strings
• Wide input voltage range
• Dimming control options
• Thermal shutdown protection
• Small form factor package

Package

LT3964IUHE#PBF is available in a compact 38-lead QFN package.

Essence

The essence of LT3964IUHE#PBF lies in its ability to efficiently drive LED strings with high voltage and high current, while providing constant current output and various dimming control options.

Packaging/Quantity

LT3964IUHE#PBF is typically packaged in reels and is available in quantities of 2500 units per reel.

Specifications

• Input Voltage Range: 4V to 36V
• Output Current Range: Up to 1.5A
• Maximum Switching Frequency: 2MHz
• Dimming Control Options: Analog, PWM, I²C
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3964IUHE#PBF has a total of 38 pins. The pin configuration is as follows:

1. VIN: Input voltage
2. GND: Ground
3. VCC: Supply voltage
4. VREF: Reference voltage
5. FB: Feedback pin for regulating output current
6. DIM: Dimming control input
7. EN/UVLO: Enable/Undervoltage lockout
8. SYNC: Synchronization input
9. ISET: Current set pin
10. AGND: Analog ground
11. PWM: Pulse width modulation dimming control input
12. SDA: I²C data input
13. SCL: I²C clock input 14-38: LED output pins

Functional Features

1. High Voltage and High Current Capability

The LT3964IUHE#PBF is capable of driving high voltage and high current LED strings, making it suitable for applications that require bright and powerful lighting.

2. Constant Current Output

With its constant current output capability, the LT3964IUHE#PBF ensures consistent brightness across the LED string, regardless of variations in forward voltage drops.

3. Wide Input Voltage Range

The LT3964IUHE#PBF can operate within a wide input voltage range of 4V to 36V, allowing flexibility in various power supply configurations.

4. Dimming Control Options

This LED driver offers multiple dimming control options, including analog, pulse width modulation (PWM), and I²C interface. This enables precise control over the brightness levels of the LED string.

5. Thermal Shutdown Protection

To prevent damage from excessive heat, the LT3964IUHE#PBF incorporates thermal shutdown protection, ensuring safe operation even under demanding conditions.

Advantages and Disadvantages

Advantages

• High voltage and high current capability
• Constant current output for uniform brightness
• Wide input voltage range for flexible power supply configurations
• Multiple dimming control options for precise brightness control
• Thermal shutdown protection for enhanced safety

Disadvantages

• Limited to driving LED strings only
• Requires additional external components for proper operation

Working Principles

The LT3964IUHE#PBF operates by regulating the current flowing through the LED string. It uses a feedback mechanism to maintain a constant current output, compensating for variations in the forward voltage drops of the LEDs. The dimming control options allow the user to adjust the brightness levels by modulating the current supplied to the LED string.

Detailed Application Field Plans

The LT3964IUHE#PBF finds applications in various lighting scenarios, including but not limited to: - Architectural lighting - Automotive lighting - Industrial lighting - Signage and display lighting - Backlighting for LCD panels - Street lighting

Detailed and Complete Alternative Models

1. LT3799: Similar high voltage, high current LED driver with additional features like fault protection and adjustable switching frequency.
2. LT3957: LED driver with similar characteristics but designed specifically for automotive lighting applications.
3. LT3476: LED driver with lower voltage and current capabilities, suitable for low-power lighting applications.

These alternative models offer different specifications and features, allowing users to choose the most suitable option based on their specific requirements.

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