LM3644YFFR

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High efficiency, compact size, adjustable current, wide input voltage range
• Package: 20-pin DSBGA (0.4mm pitch)
• Essence: Regulates and controls the current flowing through LEDs
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Current Range: Up to 1A
• Switching Frequency: Adjustable up to 2MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM3644YFFR has a total of 20 pins. The pin configuration is as follows:

1. EN (Enable)
2. VIN (Input Voltage)
3. GND (Ground)
4. VOUT (Output Voltage)
5. FB (Feedback)
6. AGND (Analog Ground)
7. ISET (Current Set)
8. DIM (Dimming Control)
9. PWM (Pulse Width Modulation)
10. NC (No Connection)
11. NC
12. NC
13. NC
14. NC
15. NC
16. NC
17. NC
18. NC
19. NC
20. NC

Functional Features

• Efficiently drives high-power LEDs with adjustable current control
• Wide input voltage range allows for versatile applications
• Supports both analog and PWM dimming control methods
• Integrated protection features such as over-temperature and over-voltage protection
• Compact package size enables space-saving designs

Advantages and Disadvantages

Advantages: - High efficiency operation - Adjustable current control for precise LED brightness - Wide input voltage range allows for compatibility with various power sources - Compact size enables integration into space-constrained designs

Disadvantages: - Limited output current capability compared to some other LED drivers - Requires external components for proper operation

Working Principles

The LM3644YFFR is a buck LED driver that regulates the current flowing through LEDs. It operates by converting the input voltage to a lower voltage level using a switching regulator. The converted voltage is then used to drive the LEDs, while the current is controlled based on the feedback received from the FB pin. The dimming control can be achieved either through analog voltage control or PWM signal.

Detailed Application Field Plans

The LM3644YFFR LED driver finds applications in various fields, including:

1. Automotive lighting systems
2. Backlighting for LCD displays
3. General illumination
4. Portable devices
5. Signage and advertising displays

Detailed and Complete Alternative Models

1. LM3409 - High Power LED Driver
2. LM3410 - Constant Current Buck LED Driver
3. LM3429 - Synchronous Buck LED Driver
4. LM34927 - High Efficiency LED Driver
5. LM3601 - Boost LED Driver

These alternative models offer similar functionality and can be considered as alternatives to the LM3644YFFR depending on specific requirements.

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