LP8557AYFQR

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High efficiency, adjustable brightness, compact size
• Package: QFN (Quad Flat No-Lead)
• Essence: This IC is designed to drive LEDs in various applications.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 4.5V to 24V
• Output Current Range: Up to 1.2A
• Dimming Control: PWM (Pulse Width Modulation)
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 95%
• Protection Features: Overvoltage, overcurrent, and thermal protection

Pin Configuration

The LP8557AYFQR has a total of 20 pins. Here is the detailed pin configuration:

1. VCC
2. GND
3. EN
4. DIM
5. FB
6. ISET
7. AGND
8. VIN
9. SW
10. LX
11. LX
12. LX
13. LX
14. LX
15. LX
16. LX
17. LX
18. LX
19. LX
20. LX

Functional Features

• High efficiency LED driver for backlighting applications
• Adjustable brightness control through PWM dimming
• Wide input voltage range allows for versatile usage
• Overvoltage, overcurrent, and thermal protection ensure safe operation
• Compact size and low profile package for space-constrained designs

Advantages and Disadvantages

Advantages: - High efficiency results in lower power consumption - Adjustable brightness allows for customization - Wide input voltage range provides flexibility in different applications - Compact size enables integration in small form factor devices

Disadvantages: - Limited output current range may not be suitable for high-power LED applications - Requires external components for proper operation

Working Principles

The LP8557AYFQR is a constant current LED driver that utilizes PWM dimming control. It regulates the current flowing through the LEDs to maintain consistent brightness levels. The input voltage is converted to a regulated current source, which is then supplied to the LEDs. The brightness can be adjusted by varying the duty cycle of the PWM signal applied to the DIM pin.

Application Field Plans

The LP8557AYFQR is commonly used in various backlighting applications, including:

1. LCD monitors and televisions
2. Automotive infotainment systems
3. Portable electronic devices (e.g., smartphones, tablets)
4. Industrial control panels
5. Signage and display boards

Alternative Models

Here are some alternative models that can be considered as replacements for the LP8557AYFQR:

1. LP8556AYFQR
2. LP8558AYFQR
3. LP8559AYFQR
4. LP8560AYFQR
5. LP8561AYFQR

These models offer similar functionality and characteristics, providing options for different design requirements.

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