LP5521TM/NOPB

LED Driver IC Overview

The LP5521TM/NOPB is a three-channel RGB/White LED driver from Texas Instruments, designed for backlight applications. It features an integrated charge pump topology with a switching frequency of 1.25MHz. The device supports I2C dimming control and operates within a supply voltage range of 2.7V to 5.5V. Each channel provides a maximum output current of 25.5mA, with a regulated output voltage of up to 4.55V. It utilizes a 20-TuSMD package and functions reliably across a temperature range of -30°C to 85°C.

LED Driver IC Feature Summary

• Integrates internal programmable memory for autonomous operation without external microcontrollers.
• Supports mixed analog and PWM dimming modes controlled via the I2C interface.
• Includes an integrated charge pump to drive high-voltage LED strings from low supply voltages.

LED Driver IC Applications

• RGB and White LED backlighting systems
• Portable electronic display illumination
• Mobile device lighting solutions

LED Driver IC Procurement Notes

Verify that the specific suffix matches the required package variant, as 'TM' denotes the DSBGA-20 form factor. Confirm RoHS compliance status and ensure the ordering part number aligns with the exact tape-and-reel or cut-tape requirements specified by the manufacturer's current production guidelines.

LED Driver IC Selection Notes

Select this component when a compact solution for multi-color LED regulation is required. The integrated charge pump eliminates the need for external inductors, reducing board space. Ensure the application design accommodates the 1.25MHz switching frequency and verifies compatibility with the I2C bus speed limitations of the host controller.

LED Driver IC Part Context

This device belongs to the LP5521 series of LED drivers, which are optimized for portable electronics. It distinguishes itself through its small footprint and ability to manage complex color mixing tasks efficiently. The series is widely used in consumer electronics where size constraints and power efficiency are critical design parameters.

LED Driver IC Replacement Considerations

LP5521TMX/NOPB

LED Driver IC FAQ

What is the maximum output current per channel?

Each of the three channels can deliver a maximum output current of 25.5mA.

Does the device require an external microcontroller for basic operation?

No, it features internal program memory that allows for autonomous operation after initial configuration.