LP3946LD/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics: High-performance, low-power, 4-channel LED driver
• Package: QFN (Quad Flat No-Lead)
• Essence: Efficiently drives and controls LEDs in various applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Current Range: 10mA to 25mA per channel
• Number of Channels: 4
• Interface: I2C-compatible
• Operating Temperature Range: -40°C to +85°C
• Dimming Control: PWM (Pulse Width Modulation)
• Protection Features: Over-temperature, over-voltage, and short-circuit protection

Detailed Pin Configuration

The LP3946LD/NOPB has a total of 20 pins arranged as follows:

1. VCC
2. GND
3. SDA
4. SCL
5. INT
6. OE
7. O0
8. O1
9. O2
10. O3
11. REXT
12. VLED
13. VLED
14. VLED
15. VLED
16. VLED
17. VLED
18. VLED
19. VLED
20. VLED

Functional Features

• Independent control of each LED channel
• Programmable LED brightness through PWM dimming
• Flexible LED grouping and mapping options
• Support for both individual and global LED blinking
• Configurable LED fade-in and fade-out effects
• Low standby current consumption for power efficiency

Advantages and Disadvantages

Advantages

• High-performance LED driver with low power consumption
• Versatile control options for various LED applications
• Robust protection features ensure reliable operation
• Compact QFN package allows for space-saving designs
• Wide operating temperature range for diverse environments

Disadvantages

• Limited to driving LEDs within the specified voltage and current ranges
• Requires an external resistor for setting the reference current

Working Principles

The LP3946LD/NOPB is an I2C-compatible LED driver IC that efficiently drives and controls LEDs. It operates by receiving commands through the I2C interface, allowing independent control of each LED channel. The IC generates PWM signals to adjust the brightness of the LEDs, enabling smooth dimming effects. Additionally, it provides protection against over-temperature, over-voltage, and short-circuit conditions, ensuring safe operation.

Detailed Application Field Plans

The LP3946LD/NOPB finds applications in various fields, including:

1. Automotive lighting systems
2. Backlighting for LCD displays
3. Portable electronic devices
4. Signage and advertising displays
5. Decorative lighting
6. Industrial control panels

Detailed and Complete Alternative Models

1. LP3946LD/NOPB: 4-channel LED driver with I2C interface
2. LP3946SD/NOPB: 4-channel LED driver with SPI interface
3. LP3946QD/NOPB: 4-channel LED driver with UART interface
4. LP3946MD/NOPB: 4-channel LED driver with parallel interface

These alternative models offer similar functionality but differ in terms of the communication interface used.

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