LM3648YFFR

Product Overview

Category: Integrated Circuit (IC)

Use: The LM3648YFFR is a high-efficiency, white LED driver designed for backlight applications in LCD displays. It provides a compact and efficient solution for controlling the brightness of multiple LEDs.

Characteristics: - High efficiency - Compact size - Wide input voltage range - Adjustable current control - PWM dimming capability

Package: The LM3648YFFR is available in a small 12-pin DSBGA package, which allows for space-saving integration into various electronic devices.

Essence: The essence of the LM3648YFFR lies in its ability to efficiently drive and control the brightness of white LEDs used in LCD backlighting, ensuring optimal display performance.

Packaging/Quantity: The LM3648YFFR is typically sold in reels or tubes, with a quantity of 3000 units per reel/tube.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Current Range: Up to 30mA per channel
• Dimming Control: PWM (Pulse Width Modulation)
• Operating Temperature Range: -40°C to +85°C
• Package Type: 12-pin DSBGA

Detailed Pin Configuration

The LM3648YFFR features the following pin configuration:

1. EN (Enable): Enable pin for turning on/off the LED driver.
2. VIN (Input Voltage): Power supply input pin.
3. GND (Ground): Ground reference pin.
4. VOUT (Output Voltage): Output voltage pin for driving LEDs.
5. DIM (Dimming Control): Pin for controlling the brightness through PWM signal.
6. NC (No Connection): Not connected pin.
7. NC (No Connection): Not connected pin.
8. NC (No Connection): Not connected pin.
9. NC (No Connection): Not connected pin.
10. LED1: Positive terminal of LED 1.
11. LED2: Positive terminal of LED 2.
12. LED3: Positive terminal of LED 3.

Functional Features

• High efficiency conversion of input voltage to drive LEDs.
• Adjustable current control for precise brightness adjustment.
• PWM dimming capability allows for smooth and flicker-free dimming.
• Over-temperature protection to prevent damage to the device.
• Low quiescent current consumption in shutdown mode.

Advantages and Disadvantages

Advantages: - High efficiency results in lower power consumption. - Compact size enables integration into space-constrained designs. - Wide input voltage range allows for compatibility with various power sources. - PWM dimming provides flexible brightness control. - Over-temperature protection ensures device reliability.

Disadvantages: - Limited output current may not be suitable for high-power LED applications. - Requires external components for proper operation. - Sensitive to ESD (Electrostatic Discharge) and requires proper handling.

Working Principles

The LM3648YFFR operates by converting the input voltage to a regulated output voltage suitable for driving white LEDs. The internal circuitry adjusts the current flowing through the LEDs based on the control signal received at the DIM pin. This allows for precise brightness control through PWM dimming.

Detailed Application Field Plans

The LM3648YFFR is commonly used in various LCD backlighting applications, including: - Mobile phones - Tablets - Portable gaming devices - Automotive displays - Industrial equipment displays

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM3648YFFR include: - TPS61165 - MAX1586 - LT3597 - BD8381EFV

These alternative models can be considered based on specific application requirements and design constraints.

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