LP55231SQE/NOPB

LED Driver IC Overview

The LP55231SQE/NOPB is a programmable LED driver IC from Texas Instruments featuring nine independent output channels. It utilizes a charge pump topology to drive LEDs with a maximum output current of 25.5 mA per channel. The device operates within an input voltage range of 2.7 V to 5.5 V and supports I2C control for configuration. Key electrical parameters include a switching frequency of 1.25 MHz, an output voltage range of 3.6 V to 5.5 V, and a maximum supply current of 750 uA. It is housed in a WQFN-24 package and functions within a temperature range of -30°C to +85°C.

LED Driver IC Feature Summary

• Integrates a microcontroller allowing individual channel programming for complex lighting effects without external MCU intervention.
• Supports I2C interface with address selection, enabling multiple devices on a single bus.
• Features a capacitive charge pump topology for efficient LED driving with minimal external components.

LED Driver IC Applications

• Medical imaging and camera light source control
• Ambient lighting for smart speakers and IoT devices
• RGB LED backlighting for displays

LED Driver IC Procurement Notes

Verify the suffix 'NOPB' indicates lead-free status and RoHS compliance as specified by Texas Instruments. Confirm the package marking matches the WQFN-24 form factor. Ensure the supplier provides the official datasheet for register mapping verification. Check that the component is new and free from physical damage to the exposed pad thermal connection.

LED Driver IC Selection Notes

Select this component when nine individually controllable LED channels are required with integrated timing and pattern generation. It is suitable for designs needing precise current regulation up to 25.5 mA per channel. Consider the I2C interface requirements and available address options for system integration. Evaluate the power budget against the 750 uA supply current specification.

LED Driver IC Part Context

This part belongs to the LP55231 series of programmable LED drivers. It is designed for applications requiring sophisticated lighting control without heavy processing load on the main processor. The SQE variant specifies the commercial temperature grade and WQFN-24 packaging. It complements other TI LED drivers by offering high channel count in a compact footprint.

LED Driver IC Replacement Considerations

LP55231SQX/NOPB

LED Driver IC FAQ

Can the LP55231 operate without an external microcontroller?

Yes, it integrates a microcontroller that allows internal programming of patterns, blinking, and fading sequences independently.

What is the maximum number of LP55231 devices supported on one I2C bus?

Up to four devices can be connected to a single I2C bus using different address selections.