RT8561AGQW

Overview

The RT8561AGQW is an eight-channel LED driver IC manufactured by Richtek USA Inc., designed for high-voltage lighting applications. It utilizes a boost topology with an internal switch and operates within a supply voltage range of 6 V to 24 V, delivering a maximum output voltage of 40 V. Each channel supports an adjustable output current between 10 mA and 30 mA at a fixed switching frequency of 1 MHz. The device features PWM and analog dimming capabilities, soft start functionality, and overtemperature protection. It is housed in a 24-WQFN (4x4) package and operates across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates eight independent constant-current channels for multi-string LED driving
• Supports both pulse-width modulation and analog dimming control methods
• Includes built-in thermal shutdown and soft-start circuitry for system protection

Applications

• LED backlighting systems
• High-voltage LED lighting modules
• General-purpose LED illumination drivers

Procurement Notes

Verify component authenticity through authorized distributors as the part is officially marked as obsolete. Confirm that the specific WQFN-24 package variant matches design requirements. Check for moisture sensitivity level compliance during storage and handling. Ensure replacement strategies are evaluated due to end-of-life status.

Selection Notes

Select this component for designs requiring multiple LED strings driven from a single boost converter stage. The 1 MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Verify that the input voltage range accommodates the specific battery or power source characteristics of the target application.

Part Context

This device belongs to the RT8561 family of LED drivers from Richtek. It shares functional similarities with other members like the RT8560GQW but differs in channel count and voltage ratings. The RT8561AGQW specifically targets applications needing eight regulated outputs within a compact surface-mount footprint.

Replacement Considerations

Public confirmed substitute part numbers: None identified.