NCR320UX

Overview

The Nexperia NCR320UX is a constant current LED driver featuring an integrated resistor-equipped NPN transistor and two diodes on a single chip. It provides a stabilized output current of 10 mA without requiring external resistors, while supporting adjustable currents up to 250 mA when an external resistor is utilized. The device operates with a low voltage overhead of 1.4 V and supports supply voltages up to 16 V. It offers high current accuracy across supply voltage variations and delivers a maximum power dissipation of 750 mW within the SOT457 (SC-74; TSOP6) plastic package.

Feature Summary

• Stabilized output current of 10 mA without external components
• Adjustable output current up to 250 mA via external resistor
• High current accuracy under supply voltage variations
• Low voltage overhead of 1.4 V for efficient operation

Applications

• Constant LED driver circuits
• Generic constant current sources
• Automotive interior lighting systems
• Dashboard instrumentation displays
• Number plate illumination

Procurement Notes

Verify the specific suffix 'UX' against official Nexperia documentation to confirm exact tape-and-reel specifications and marking codes. Ensure the selected distributor source aligns with authorized channels to guarantee component authenticity. Confirm that the SOT457 package dimensions match your PCB footprint requirements prior to finalizing procurement orders.

Selection Notes

Select this component when a compact solution for fixed or adjustable LED current regulation is required without complex external circuitry. The integrated design reduces bill-of-materials count and board space. Consider the 1.4 V overhead and 16 V supply limit to ensure compatibility with the target application's voltage rails and thermal constraints.

Part Context

The NCR320UX belongs to Nexperia's range of LED drivers designed for automotive and general lighting applications. It integrates an NPN transistor and diodes in a small SOT457 package, offering a simplified alternative to discrete solutions. This integration aids in reducing component count and improving reliability in space-constrained designs such as instrument clusters and interior vehicle lighting.

Replacement Considerations

The NCR321U is a related variant within the same series, distinguished by the addition of a digital PWM input capability for dimming control up to 10 kHz frequency. Verify if pulse-width modulation functionality is required for the specific application before substituting.