Overview
The LP55281TLX/NOPB is a highly integrated, 12-channel RGB/White-LED driver designed by Texas Instruments. This device is specifically tailored for handheld devices, such as cellular phones, PDAs, and MP3 players. It can drive four RGB LED sets and a single fun-light LED, making it an ideal solution for applications requiring multiple LED channels. The LP55281 features a high-efficiency boost DC-DC converter that can generate an output voltage of 4 to 5.3 volts from a single Li-Ion battery input ranging from 3 to 4.5 volts. The device also includes an audio synchronization feature, allowing the fun-light LED to be synchronized with audio inputs. The flexible SPI or I2C interface enables easy control and configuration of the LED drivers.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Product Category | LED Lighting Drivers |
| RoHS | Yes |
| Number of Channels | 12 Channel |
| Input Voltage | 3 V to 5.5 V |
| Supply Current - Max | 600 uA |
| Minimum Operating Temperature | -30 C |
| Maximum Operating Temperature | +85 C |
| Mounting Style | SMD/SMT |
| Package / Case | DSBGA-36 |
| Series | LP55281 |
| Packaging | Reel |
| Features | Current Control, I2C Control |
| Height | 0.36 mm |
| Length | 3 mm |
| Width | 3 mm |
| Operating Temperature Range | -30 C to +85 C |
| Output Voltage | 5.3 V |
| Low Level Output Current | 40000 uA |
| Operating Supply Voltage | 3 V to 5.5 V |
| Factory Pack Quantity | 1000 |
| Unit Weight | 0.000388 oz |
Key Features
- High-Efficiency Boost DC-DC Converter: Generates an output voltage of 4 to 5.3 volts from a single Li-Ion battery input.
- Audio Synchronization: Allows the fun-light LED to be synchronized with audio inputs.
- SPI or I2C Interface: Flexible interface for easy control and configuration.
- Four PWM Controlled RGB LED Drivers: Each set of RGB LEDs can be controlled individually with a 6-bit PWM control register.
- LED Connectivity Test: Feature to test LED connections through the serial interface.
- Compact Package: Small DSBGA-36 package suitable for handheld devices with minimal external components.
- Programmable Output Voltage: Output voltage can be controlled with an 8-bit register in 9 steps.
- Protection Schemes: Includes overvoltage protection, overcurrent protection, feedback break protection, and duty cycle limiting.
Applications
- Cellular Phones: Ideal for backlighting and indicator LEDs in mobile phones.
- PDAs and MP3 Players: Suitable for various handheld electronic devices requiring multiple LED channels.
- Other Handheld Devices: Can be used in any handheld device that requires efficient and flexible LED lighting solutions.
Q & A
- What is the primary function of the LP55281TLX/NOPB?
The LP55281TLX/NOPB is a 12-channel RGB/White-LED driver designed to drive up to 12 LED channels, including four RGB LED sets and a single fun-light LED.
- What is the input voltage range of the LP55281TLX/NOPB?
The input voltage range is 3 V to 5.5 V.
- What interfaces does the LP55281TLX/NOPB support?
The device supports both SPI and I2C interfaces for easy control and configuration.
- What is the maximum output current per channel?
The maximum output current per channel is 40 mA.
- Does the LP55281TLX/NOPB have any audio synchronization features?
Yes, it includes an audio synchronization feature for the fun-light LED.
- What is the operating temperature range of the LP55281TLX/NOPB?
The operating temperature range is -30 C to +85 C.
- What package type does the LP55281TLX/NOPB come in?
The device comes in a DSBGA-36 package.
- Does the LP55281TLX/NOPB have any built-in protection schemes?
Yes, it includes overvoltage protection, overcurrent protection, feedback break protection, and duty cycle limiting.
- How can the output voltage of the boost converter be controlled?
The output voltage can be controlled with an 8-bit register in 9 steps.
- What is the purpose of the LED connectivity test feature?
The LED connectivity test feature allows users to test LED connections through the serial interface, which is useful in production for checking LED connections.
