RT8543GQW

Overview

The RT8543GQW is a white LED driver IC featuring a boost regulator topology with six independent output channels. It supports an output current range of 5 mA to 50 mA per channel and delivers a maximum output voltage of 43 V. The device operates on a supply voltage between 2.5 V and 24 V, with a switching frequency adjustable from 600 kHz to 1.2 MHz. Packaged in a 20-WQFN (4x4) format, it functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a boost converter for driving multiple high-voltage LED strings
• Supports PWM dimming control for brightness adjustment
• Includes overvoltage protection circuitry for system safety

Applications

• LED backlighting systems
• White LED lighting drivers
• Portable electronic displays

Procurement Notes

Verify the specific suffix designation against the manufacturer datasheet to confirm pinout and functional variations. Ensure compatibility with surface-mount assembly processes due to the WQFN package type. Confirm moisture sensitivity level requirements for storage and reflow soldering profiles prior to procurement.

Selection Notes

Select this component for applications requiring up to six series-connected LED strings driven by a single boost regulator. Verify that the required forward voltage does not exceed the 43 V limit. Ensure the input power source accommodates the 2.5 V minimum operating voltage and that thermal management suits the 20-WQFN footprint.

Part Context

This part belongs to the Richtek RT8543 family of LED lighting driver integrated circuits. It is designed specifically for multi-string white LED configurations, utilizing a synchronous boost architecture to maintain constant current across the outputs while regulating the input power efficiently.

Replacement Considerations

RT8532AGQW