LP55231SQX/NOPB

LED Driver IC Overview

The LP55231SQX/NOPB is a programmable LED driver IC from Texas Instruments featuring nine independent output channels. It utilizes an internal charge pump topology to support output voltages ranging from 3.6 V to 5.5 V, with each channel capable of delivering up to 25.5 mA. The device operates on a supply voltage between 2.7 V and 5.5 V and functions at a switching frequency of 1.25 MHz. It is housed in a WQFN-24 package and supports I2C control for configuration.

LED Driver IC Feature Summary

• Integrates a microcontroller allowing individual channel programming for complex lighting effects without external MCU intervention
• Features an I2C control interface with address selection capabilities for multi-device bus configurations
• Includes an integrated charge pump to enable high-efficiency LED driving across varying voltage requirements

LED Driver IC Applications

• Medical diagnostic instruments requiring precise light source control
• Camera module illumination systems
• RGB LED screen backlighting applications
• Smart speaker ambient lighting indicators

LED Driver IC Procurement Notes

Verify the suffix SQX indicates the specific tape-and-reel packaging variant when ordering. Confirm that the NOPB designation ensures compliance with RoHS standards and restricts hazardous substances. Ensure the procurement order specifies the correct quantity multiples if utilizing full reel options rather than cut tape or MouseReel formats.

LED Driver IC Selection Notes

Select this component when nine individually controllable LED channels are required within a compact footprint. The internal microcontroller capability simplifies system design by offloading timing and pattern generation tasks from the main processor. Verify that the application voltage range aligns with the 2.7 V to 5.5 V input specification and that I2C communication protocols are supported by the host controller.

LED Driver IC Part Context

This part belongs to the LP55231 series of LED lighting drivers designed for applications demanding flexible and programmable illumination control. The SQX/NOPB variant specifically denotes the surface-mount WQFN-24 package configuration compliant with environmental regulations. It serves as a specialized solution for managing multiple LEDs in space-constrained electronic devices.

LED Driver IC Replacement Considerations

LP55231SQE/NOPB

LED Driver IC FAQ

Can the LP55231 operate without an external microcontroller?

Yes, the device integrates a microcontroller that allows for independent programming of each channel's current and PWM control, enabling standalone operation for predefined lighting patterns.

What is the maximum number of LP55231 devices that can be connected on a single I2C bus?

Up to four LP55231 devices can be connected to a single I2C bus due to the available address selection options provided by the chip.