FAN5640S7X

Overview

The FAN5640S7X is a dual high-side constant current LED driver from onsemi, designed for keypad illumination and low-power lighting applications. It operates with a DC input voltage range of 6 V to 20 V and provides an output current capability configurable via external resistors, typically cited around 25 mA to 30 mA. The device supports PWM dimming and input rail dimming methods without requiring a microcontroller. It is housed in a compact 6-pin SC-70 surface-mount package, facilitating integration into space-constrained electronic designs.

Feature Summary

• Dual high-side constant current source architecture for independent LED channel control
• Configurable output current using external resistors without microcontroller dependency
• Supports both PWM and input rail dimming operations for brightness adjustment

Applications

• Keypad illumination in consumer electronics
• Low-power indicator lighting in smart home devices
• LED status indicators in commercial equipment

Procurement Notes

Verify the specific suffix 'S7X' against the manufacturer's official datasheet to confirm pinout and electrical specifications. Ensure the selected component matches the required SC-70-6 package dimensions. Cross-reference the ordering part number with authorized distributors to avoid counterfeit components. Confirm that the voltage and current ratings align with the target LED load requirements before procurement.

Selection Notes

Select this component when a dual-channel solution is required for high-side LED driving in space-limited designs. The SC-70-6 package offers a small footprint suitable for portable or dense PCB layouts. Consider the 6 V to 20 V input range compatibility with the system power supply. Verify that the external resistor configuration can achieve the desired constant current level for the connected LEDs.

Part Context

This part belongs to onsemi's family of LED driver integrated circuits focused on simple, cost-effective solutions for backlighting and indication. The FAN5640 series specifically targets applications needing dual-channel control with minimal external components. It serves as a standalone driver, reducing design complexity compared to microcontroller-driven GPIO solutions.

Replacement Considerations

Check for direct cross-references in onsemi's product change notices. Verify pin-to-pin compatibility if substituting with other dual high-side drivers. Ensure the replacement maintains the same SC-70-6 package and voltage/current specifications.