LP8543SQE/NOPB

LED Driver IC Overview

The LP8543SQE/NOPB is a high-efficiency LED backlight driver IC from Texas Instruments, designed for WLED applications. It features a boost topology with seven independent current-regulated outputs, each capable of delivering up to 60 mA. The device operates on an input voltage range of 5.5 V to 22 V and supports a maximum output voltage of 40 V. It integrates an internal switch and supports switching frequencies between 625 kHz and 1.25 MHz. Control is facilitated via I2C/SMBus and PWM interfaces, allowing for precise brightness regulation. The component is housed in a 24-WQFN package and functions within a temperature range of -40°C to +85°C.

LED Driver IC Feature Summary

• Integrates seven independent constant-current channels for multi-string WLED backlighting
• Supports digital control through I2C/SMBus interface for configuration and dimming
• Includes hardware PWM dimming capability for flicker-free brightness adjustment
• Features an integrated power switch and boost converter for efficient operation

LED Driver IC Applications

• WLED backlight drivers for mobile devices
• LCD backlight systems for portable electronics
• High-efficiency LED lighting solutions requiring multiple strings

LED Driver IC Procurement Notes

Verify the specific suffix 'SQE' against the manufacturer's official documentation to confirm exact binning or quality grade specifications. Ensure compatibility with the target PCB footprint for the 24-WQFN package. Cross-reference the datasheet for any recent design changes or lifecycle notices prior to finalizing procurement plans.

LED Driver IC Selection Notes

Select this component when designing systems requiring seven independent LED channels with high efficiency. It is suitable for applications needing digital control via I2C and hardware PWM dimming. Consider the 5.5 V to 22 V input range and 40 V output limit to ensure alignment with the battery and LED string requirements of the target device.

LED Driver IC Part Context

This part belongs to the LP8543 series of LED drivers from Texas Instruments. It is specifically engineered for white LED backlighting in portable consumer electronics. The SQE suffix typically denotes automotive-grade qualification or specific reliability standards as defined by the manufacturer, distinguishing it from standard commercial variants.

LED Driver IC Replacement Considerations

LP8543SQ/NOPB is listed as a direct substitute.