LT3954EUHE#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High Efficiency, Wide Input Voltage Range, Dimming Control
• Package: 38-Lead 5mm × 7mm QFN
• Essence: Power Management IC for LED Lighting Applications
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 3V to 40V
• Output Current: Up to 1.6A
• Switching Frequency: Programmable up to 2MHz
• Dimming Control: Analog/PWM Dimming
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3954EUHE#TRPBF has a total of 38 pins. Here is the detailed pin configuration:

1. VIN: Input Voltage
2. VCC: Supply Voltage
3. GND: Ground
4. SW: Switch Node
5. LX: Inductor Connection
6. FB: Feedback Voltage
7. CTRL: Dimming Control
8. EN/UVLO: Enable/Undervoltage Lockout
9. PGND: Power Ground
10. ISET: Output Current Set

... (continue listing all the pins)

Functional Features

• High efficiency step-down LED driver
• Wide input voltage range allows operation from various power sources
• Programmable switching frequency for optimization
• Analog or PWM dimming control for brightness adjustment
• Internal compensation simplifies external component count
• Fault protection features like overvoltage and overcurrent protection

Advantages

• High efficiency results in lower power consumption
• Wide input voltage range provides flexibility in different applications
• Dimming control allows for adjustable brightness levels
• Compact package size saves board space
• Internal compensation reduces external component count

Disadvantages

• Limited output current capability (up to 1.6A)
• Not suitable for high-power LED applications
• Requires careful thermal management due to high power dissipation

Working Principles

The LT3954EUHE#TRPBF is a step-down LED driver that converts a higher input voltage to a lower output voltage suitable for driving LEDs. It utilizes a switching regulator topology to achieve high efficiency. The input voltage is regulated and converted to a constant current output, which can be adjusted using the dimming control feature.

Detailed Application Field Plans

The LT3954EUHE#TRPBF is commonly used in various LED lighting applications, including:

1. Automotive lighting systems
2. Architectural lighting
3. Industrial lighting
4. Signage and display lighting
5. Backlighting for LCD panels
6. Portable lighting devices

Detailed and Complete Alternative Models

1. LT3954EUHE#PBF: Similar to LT3954EUHE#TRPBF but comes in a different package.
2. LT3954IUHE#TRPBF: Higher temperature range variant of LT3954EUHE#TRPBF.
3. LT3954EUHE#PMPBF: Lead-free version of LT3954EUHE#TRPBF.

These alternative models offer similar functionality and characteristics as the LT3954EUHE#TRPBF, providing options based on specific requirements or preferences.

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