RT4503GQW

Overview

The RT4503AGQW is a highly integrated LED driver IC designed for driving up to ten white LEDs in series. It utilizes an asynchronous Boost converter topology with current mode control and integrates a 36V/1.2A power switch. The device operates with a supply current of 1.5uA and is housed in a 6-pin WDFN EP package.

Feature Summary

• Integrates a 36V/1.2A power switch within the Boost converter architecture
• Capable of driving ten white LEDs connected in series
• Employs current mode control for stable regulation

Applications

• Backlighting systems requiring multiple series-connected white LEDs

Procurement Notes

Verify the exact suffix against official documentation, as the provided model lacks the 'A'. Confirm pinout compatibility and thermal pad requirements for the WDFN EP package during integration. Ensure input voltage ranges align with the 36V switch rating.

Selection Notes

Select this component for designs necessitating high integration and minimal external components for multi-string LED arrays. Evaluate the 1.2A switch limit against total LED forward current requirements. Consider the asynchronous topology efficiency characteristics relative to synchronous alternatives.

Part Context

This part belongs to Richtek's portfolio of integrated LED drivers. It is distinct from synchronous buck converters like the RT7243GQW or other boost regulators such as the RT4841GQW. The specific integration level targets compact backlight solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.