LP8543SQ

LED Driver IC Overview

The LP8543SQ/NOPB is a high-voltage DC/DC boost converter with an integrated FET, designed as an LED lighting driver IC. It features seven independent output channels capable of delivering up to 60 mA per channel. The device operates on a supply voltage range of 5.5 V to 22 V and supports an output voltage of up to 40 V. It utilizes I2C/SMBus control for configuration and PWM dimming for brightness adjustment. The switching frequency ranges from 625 kHz to 1.25 MHz. Packaged in a 24-WQFN (4x4) case, it functions within a temperature range of -40°C to +85°C.

LED Driver IC Feature Summary

• Seven-channel WLED driver architecture with individual current regulation
• Digital interface control via SMBus/I2C for programmable parameters
• Integrated power FET with boost topology for efficient voltage step-up
• Supports PWM dimming for precise backlight brightness control

LED Driver IC Applications

• Backlight drivers for mobile devices
• White LED illumination systems
• Portable electronic display modules

LED Driver IC Procurement Notes

Verify the specific suffix 'SQ' against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure the 'NOPB' designation is included to guarantee lead-free compliance. Cross-reference the full part number LP8543SQ/NOPB with authorized distributors to confirm availability status and valid ordering codes before procurement.

LED Driver IC Selection Notes

Select this component when a multi-channel white LED solution with digital control is required. The 7-output capability suits complex backlight arrays. Verify that the system input voltage falls within the 5.5 V to 22 V range. Confirm that the PCB layout can accommodate the 24-WQFN package dimensions and thermal requirements for the specified operating temperature range.

LED Driver IC Part Context

This part belongs to the LP8543 series of LED lighting driver ICs from Texas Instruments. It is specifically engineered for applications requiring multiple white LEDs driven by a single boost converter stage. The series provides a compact solution for managing current regulation across several channels while maintaining high efficiency through integrated power components.

LED Driver IC Replacement Considerations

LP8543SQE/NOPB is listed as a direct substitute by the manufacturer.