FAN5346S30X

Overview

The FAN5346S30X is an asynchronous constant-current LED driver manufactured by onsemi. It features a fixed switching frequency of 1.2MHz and supports an input voltage range from 2.5V to 5.5V. The device provides a 30V output, enabling the series driving of up to eight LEDs. Key electrical parameters include a PWM dimming frequency range of 5kHz to 100kHz and integrated protection mechanisms such as thermal shutdown, output over-voltage protection, and short-circuit detection.

Feature Summary

• Asynchronous boost converter architecture designed for series LED driving
• Integrated PWM dimming interface for brightness control
• Comprehensive protection suite including thermal shutdown and over-voltage protection

Applications

• Cellular mobile handsets
• Mobile Internet Devices
• Portable media players
• PDA, DSC, MP3 players

Procurement Notes

Verify the manufacturer designation, as the component originates from Fairchild Semiconductor prior to its acquisition by onsemi. Confirm the specific suffix 'S30X' corresponds to the 30V output variant capable of driving up to eight series LEDs. Ensure the package type matches the required small form-factor 6-lead SSOT23 configuration for the target design.

Selection Notes

Select this component for applications requiring a compact solution for driving multiple LEDs in series from a low-voltage source. The 1.2MHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 30V output limit when determining the maximum number of series-connected LEDs suitable for the specific forward voltage requirements of the application.

Part Context

This part belongs to the FAN5346 series of asynchronous constant-current LED drivers. The S30X suffix specifically denotes the version with a 30V output capability, distinguishing it from other variants like the S20X which offers a 20V output. The series is optimized for small form-factor portable electronics.

Replacement Considerations

The FAN5346S20X serves as a related variant within the same family but provides a 20V output instead of 30V. Verify if the lower output voltage meets the series LED requirements before substitution.