RT8471GJ5

Overview

The RT8471GJ5 is a high-efficiency, continuous conduction mode inductor buck converter designed to drive single or multiple series-connected LEDs from a power supply exceeding the LED voltage. It operates within an input voltage range of 7V to 36V and utilizes a high-side current sense architecture. The device integrates an internal switch capable of delivering up to 1A output current per channel. It supports both analog and PWM dimming methods for brightness control. The component is housed in a TSOT-23-5 package.

Feature Summary

• High-efficiency step-down topology optimized for LED driving applications
• Supports wide input voltage ranges suitable for various power sources
• Integrates internal switching element for compact circuit design
• Enables precise brightness control through analog and PWM dimming interfaces

Applications

• Compact electronic devices requiring efficient LED illumination
• General lighting systems utilizing series-connected LED strings
• Automotive interior lighting circuits
• Portable consumer electronics with backlighting requirements

Procurement Notes

Verify the specific suffix GJ5 against the manufacturer's official datasheet to confirm pinout compatibility and thermal characteristics. Ensure the ordering information matches the exact package type TSOT-23-5. Cross-reference the part number with the latest Richtek Technology Corporation documentation to avoid obsolete variants. Confirm that the intended application voltage does not exceed the maximum rated limits specified in the electrical characteristics table.

Selection Notes

Select this component when designing circuits that require a buck converter topology for LED strings powered by voltages higher than the load. Consider the 1A output current capability and the 7V to 36V input range as primary constraints. Evaluate the need for analog or PWM dimming functionality before finalizing the design. The integrated switch reduces external component count compared to discrete solutions. Verify thermal performance requirements for the TSOT-23-5 package under expected operating conditions.

Part Context

The RT8471 belongs to Richtek's family of high-brightness LED drivers. These components typically utilize hysteretic control modes for fast transient response. The GJ5 suffix denotes the specific package configuration and temperature grade. This series targets applications demanding high efficiency and minimal external passive components. The technology focuses on reducing board space while maintaining stable LED current regulation across varying input conditions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official replacement guide for equivalent models with compatible pinouts and electrical specifications.