LM3414HVMR/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM3414HVMR/NOPB is a high voltage step-down constant current LED driver. It is designed to provide efficient and reliable power management for LED lighting applications.

Characteristics: - High voltage input range - Constant current output - Wide dimming range - Thermal shutdown protection - Low external component count

Package: The LM3414HVMR/NOPB is available in a small outline package (SOP) with 8 pins.

Essence: The essence of the LM3414HVMR/NOPB is to regulate the current flowing through LEDs, ensuring consistent brightness and preventing damage due to overcurrent.

Packaging/Quantity: The LM3414HVMR/NOPB is typically sold in reels containing 250 units.

Specifications

• Input Voltage Range: 9V to 75V
• Output Current Range: Up to 1A
• Dimming Control: PWM or Analog
• Operating Temperature Range: -40°C to +125°C
• Efficiency: Up to 95%
• Switching Frequency: Adjustable up to 1MHz

Pin Configuration

The LM3414HVMR/NOPB has the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. DIM: Dimming control input
4. FB: Feedback pin for regulating output current
5. VCC: Supply voltage for internal circuitry
6. SW: Switch node connection
7. NC: No connection
8. VOUT: Output voltage

Functional Features

• High voltage capability allows direct connection to mains voltage
• Constant current output ensures uniform brightness across multiple LEDs
• Wide dimming range enables precise control of light intensity
• Thermal shutdown protection prevents damage due to excessive heat
• Low external component count simplifies circuit design and reduces cost

Advantages and Disadvantages

Advantages: - High voltage input range allows for versatile applications - Constant current output ensures consistent brightness - Wide dimming range provides flexibility in lighting control - Thermal shutdown protection enhances reliability - Low external component count simplifies circuit design

Disadvantages: - Limited maximum output current of 1A may not be suitable for high-power LED applications - Requires additional external components for proper operation

Working Principles

The LM3414HVMR/NOPB operates as a step-down constant current LED driver. It utilizes a buck converter topology to efficiently regulate the current flowing through the LEDs. The feedback pin (FB) monitors the output current and adjusts the duty cycle of the internal switch to maintain a constant current level.

When the input voltage is applied, the internal switch (SW) controls the flow of current through an inductor, which stores energy during the on-time and releases it to the LEDs during the off-time. This switching action allows the LM3414HVMR/NOPB to step down the high input voltage to the desired output voltage while maintaining a constant current.

Detailed Application Field Plans

The LM3414HVMR/NOPB is well-suited for various LED lighting applications, including:

1. Indoor and outdoor architectural lighting
2. Street and roadway lighting
3. Automotive lighting
4. Signage and display lighting
5. Backlighting for LCD panels
6. Industrial and commercial lighting

Its high voltage capability, constant current output, and wide dimming range make it suitable for both low-power and high-power LED lighting systems.

Detailed and Complete Alternative Models

1. LM3409HVMR/NOPB: Similar to LM3414HVMR/NOPB, but with a different pin configuration.
2. LM3414HVMA/NOPB: Similar to LM3414HVMR/NOPB, but available in a different package.
3. LM3421HVMR/NOPB: Step-down constant current LED driver with integrated boost converter for high-power applications.

These alternative models offer similar functionality and can be considered as substitutes depending on specific requirements.

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