LP8543SQ/NOPB

LED Driver IC Overview

The LP8543SQ/NOPB is a Texas Instruments LED lighting driver IC featuring a boost topology with seven independent output channels. It operates within an input voltage range of 5.5 V to 22 V and supports a maximum output voltage of 40 V. Each channel delivers up to 60 mA of output current. The device functions at a switching frequency between 625 kHz and 1.25 MHz, housed in a 24-WQFN (4x4) package. It includes internal switches and supports PWM dimming control.

LED Driver IC Feature Summary

• Integrates seven independent high-side current sources for multi-channel white LED arrays.
• Supports I2C/SMBus interface for digital configuration and PWM dimming for analog brightness control.
• Features integrated power switches and a boost DC-DC converter for efficient backlight driving.

LED Driver IC Applications

• LCD backlight drivers for mobile devices
• White LED array illumination
• Portable electronic display systems

LED Driver IC Procurement Notes

Verify the specific suffix 'SQ' against the manufacturer's official documentation to confirm temperature rating and material compliance. Ensure the ordering part number matches the required tape-and-reel quantity specifications. Cross-reference the datasheet revision date to confirm compatibility with current design requirements before finalizing procurement.

LED Driver IC Selection Notes

Select this component when designing circuits requiring seven independent LED channels driven by a single boost converter. Verify that the system input voltage falls within the 5.5 V to 22 V range and that the total LED forward voltage does not exceed the 40 V output limit. Confirm that the 24-WQFN package footprint aligns with the PCB layout constraints.

LED Driver IC Part Context

This device belongs to the LP8543 series of LED drivers from Texas Instruments. It is designed specifically for applications requiring multiple white LEDs, such as smartphone and tablet displays. The SQ variant denotes specific thermal and reliability characteristics defined by the manufacturer for industrial or commercial grade operation.

LED Driver IC Replacement Considerations

• LP8543SQE/NOPB

LED Driver IC FAQ

What is the operating temperature range for the LP8543SQ/NOPB?

The specified operating temperature range is -40°C to +85°C.

Does the LP8543SQ/NOPB include internal power switches?

Yes, the device integrates internal power switches for the boost converter topology.