Overview
The LP55231SQX/NOPB is a highly integrated, programmable, multi-channel LED driver produced by Texas Instruments. This device is specifically designed to produce lighting effects for mobile devices and other applications requiring advanced LED control. It features a high-efficiency charge pump that enables LED driving over the full Li-Ion battery voltage range, making it highly efficient and versatile. The LP55231 includes internal program memory, allowing it to operate without processor control, and it supports a two-wire I2C-compatible control interface for easy integration into various systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Full-Scale Current per Channel | 25.5 | mA | ||
| Current Setting Resolution | 8-bit | |||
| PWM Control Resolution | 12-bit | |||
| Charge Pump Efficiency | Up to 94% | |||
| LED Drive Efficiency | Up to 93% | |||
| Standby Current | 0.2 | 1 | µA | |
| Operating Temperature Range | -30 | 85 | °C | |
| Package Type | WQFN-24 | |||
| Package Size | 4.00 mm × 4.00 mm |
Key Features
- Three independent program execution engines
- 9 programmable outputs with 25.5-mA full-scale current
- Adaptive high-efficiency 1×/1.5× fractional charge pump
- Charge pump with soft start and overcurrent and short-circuit protection
- Built-in LED test and automatic power save mode
- Two-wire I2C-compatible control interface with four pin-selectable addresses
- Trigger input interface for synchronization between multiple devices
- Large SRAM program memory and flexible instruction set
- High-side current sources and temperature compensation
Applications
- Fun lights and indicator lights
- LED backlighting
- Haptic feedback
- Programmable current source
- Fire notification
- Electronic thermostats and locks
- Robotics
- Intruder notification
- Light switches and dimmers
- Gaming and smart headphones
- Speakers
Q & A
- What is the LP55231SQX/NOPB used for?
The LP55231SQX/NOPB is used to produce lighting effects for mobile devices and other applications requiring advanced LED control. - How many programmable outputs does the LP55231SQX/NOPB have?
The device has 9 programmable outputs. - What is the full-scale current per channel of the LP55231SQX/NOPB?
The full-scale current per channel is 25.5 mA. - What is the PWM control resolution of the LP55231SQX/NOPB?
The PWM control resolution is 12-bit. - What is the efficiency of the charge pump in the LP55231SQX/NOPB?
The charge pump efficiency is up to 94%. - Does the LP55231SQX/NOPB have built-in LED test capabilities?
Yes, it has built-in LED test capabilities. - What is the typical standby current of the LP55231SQX/NOPB?
The typical standby current is 1 µA. - What is the operating temperature range of the LP55231SQX/NOPB?
The operating temperature range is -30°C to 85°C. - What type of package does the LP55231SQX/NOPB come in?
The device comes in a WQFN-24 package. - What are some common applications of the LP55231SQX/NOPB?
Common applications include fun lights, indicator lights, LED backlighting, haptic feedback, and more.
