RT8577AGQW

Overview

The RT8577AGQW is a high-voltage, four-channel LED driver IC manufactured by Richtek USA Inc. It utilizes a boost topology to regulate current for white LED strings. The device supports an input voltage range from 5.5 V to 40 V and delivers up to 120 mA per channel. Operating frequencies are adjustable between 200 kHz and 2.1 MHz. It features PWM dimming, soft start, and comprehensive protection mechanisms including over-current, over-voltage, and overtemperature safeguards. The component is housed in a 20-WQFN (5x5 mm) package with exposed pad.

Feature Summary

• Integrates four independent constant current channels for driving high-voltage LED arrays.
• Supports wide-range PWM dimming control for precise brightness adjustment.
• Includes built-in protection against over-current, over-voltage, and thermal overload conditions.

Applications

• Automotive interior and exterior lighting systems
• High-brightness general illumination applications
• Industrial lighting fixtures

Procurement Notes

Verify the specific ordering suffix to ensure correct packaging configuration, as variants exist for tape and reel or cut tape formats. Confirm that the procurement source provides valid RoHS compliance documentation. Check the manufacturer's official end-of-life notifications, as this part may be subject to obsolescence schedules. Ensure the supplier is an authorized distributor to guarantee component authenticity and traceability.

Selection Notes

Select this component when a high-voltage boost architecture is required to drive multiple LED strings from a single power rail. The adjustable switching frequency allows optimization for external inductor size and efficiency. Verify that the application environment temperature falls within the specified operating range. Ensure the design accommodates the 20-pin WQFN footprint and thermal requirements associated with the exposed pad.

Part Context

This device belongs to the RT8577 family of high-voltage LED drivers designed for robust performance in demanding environments. It is classified under automotive-grade components, indicating adherence to AEC-Q100 standards for reliability. The product line focuses on integrating multiple driver channels into a compact form factor to reduce solution size.

Replacement Considerations

RT8577AN-QAA is listed as an alias for this part number. Verify pinout compatibility and electrical specifications before substituting with other multi-channel LED drivers from different manufacturers.