NCR402UX

Overview

The NCR402UX is a constant current LED driver IC manufactured by Nexperia, designed for automotive and general lighting applications. It features a stabilized output current of 20 mA with high accuracy across supply voltage variations. The device utilizes a Boost or Buck topology and supports an input voltage range up to 40 V, delivering a maximum output voltage of 16 V. It operates within a temperature range of -55 °C to +150 °C and is housed in a TSOP-6 (SOT457/SC-74) surface-mount package. The component is qualified according to AEC-Q101 standards.

Feature Summary

• Provides stabilized constant current output suitable for precise LED driving
• Features low voltage overhead to maximize efficiency in power-constrained designs
• High current accuracy maintained despite supply voltage fluctuations
• Qualified for automotive environments under AEC-Q101 reliability standards

Applications

• Constant current LED driver circuits
• Automotive lighting systems
• Generic constant current source implementations

Procurement Notes

Verify the specific suffix 'UX' against the official Nexperia datasheet to confirm tape-and-reel packaging specifications and marking codes. Ensure the selected variant meets the required AEC-Q101 qualification level if used in automotive contexts. Cross-reference the SOT457 package dimensions with the mechanical data sheet to validate PCB footprint compatibility. Confirm RoHS compliance status through the manufacturer's latest environmental declaration before finalizing procurement.

Selection Notes

Select this component when a simple, cost-effective linear-style LED driver is required for low-power applications. The fixed 20 mA output is ideal for indicator LEDs or small arrays where external regulation is unnecessary. Consider the 1.4 V voltage overhead when designing the power rail to ensure sufficient headroom. The wide operating temperature range makes it suitable for harsh environments, but verify thermal dissipation capabilities within the SC-74 package for the specific board layout.

Part Context

The NCR402U series belongs to Nexperia's portfolio of dedicated LED driver integrated circuits. These devices integrate a resistor-equipped PNP transistor with two diodes on a single chip to simplify design. The NCR402UX is a specific packaging variant of the NCR402U family, sharing identical electrical characteristics and functional pinouts. This family is engineered to reduce component count and board space compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.