RT9368GQW

Overview

The RT9368GQW is a four-channel white LED driver integrated circuit manufactured by Richtek USA Inc. It utilizes a switched capacitor charge pump topology to regulate current for WLED applications. The device operates within a supply voltage range of 2.8V to 5V and supports PWM dimming with an output current capability of 20mA per channel. It is housed in a compact 16-pin WQFN (3x3) surface-mount package, designed for efficient backlight regulation in portable electronic devices.

Feature Summary

• Four-channel independent current regulation for white LED arrays
• Integrated switched capacitor charge pump for step-up voltage conversion
• Supports pulse-width modulation (PWM) dimming control
• Compact 16-pin WQFN surface-mount packaging

Applications

• Backlight drivers for mobile phones and smartphones
• Display illumination for portable media players
• White LED regulation in handheld communication devices

Procurement Notes

Verify the specific suffix 'GQW' against official Richtek documentation to confirm pinout and thermal specifications. Confirm RoHS compliance status through manufacturer datasheets rather than distributor claims. Ensure the source provides valid traceability for this component, noting that some listings may indicate obsolete status.

Selection Notes

Select this component when designing circuits requiring four independent LED channels driven from a single low-voltage supply. The internal charge pump eliminates the need for external inductors, simplifying PCB layout. Verify that the input voltage range of 2.8V to 5V aligns with the system battery profile and that the 20mA output current meets the target LED brightness requirements.

Part Context

This part belongs to Richtek's family of WLED drivers designed for portable electronics. It integrates multiple functions into a small footprint to reduce board space. The device is distinct from linear regulators as it employs capacitive energy storage for voltage boosting, making it suitable for driving series-connected LEDs from lower voltage sources.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Consult official Richtek documentation for direct replacements or functional equivalents within the same product line.