NCR321ZX

Overview

The NCR321ZX is a linear constant current LED driver IC manufactured by Nexperia USA Inc., designed for automotive and industrial applications. It features a single output channel capable of delivering up to 250 mA, with an internal switch topology supporting supply voltages up to 16 V. The device operates within a temperature range of -55°C to +150°C and is qualified under the AEC-Q101 standard. Packaged in a SOT-223 (TO-261AA) surface-mount housing, it supports PWM dimming frequencies up to 10 kHz.

Feature Summary

• Linear constant current regulation with adjustable output capability
• Integrated internal switch for direct load driving
• Digital PWM input interface for dimming control
• Automotive-grade reliability qualification

Applications

• Automotive interior lighting systems
• Dashboard and instrumentation illumination
• Number plate lighting circuits
• Generic constant current source designs

Procurement Notes

Verify the specific suffix 'ZX' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with AEC-Q101 requirements if used in automotive contexts. Confirm that the SOT-223 thermal characteristics meet the application's power dissipation needs. Cross-reference ordering information with authorized distributors to ensure genuine component sourcing.

Selection Notes

Select this component when a robust, single-channel LED driver is required for high-temperature environments. The linear topology suits applications where simplicity and low component count are prioritized over efficiency. Consider the 16 V maximum supply voltage and 250 mA output limit during circuit design. Verify that the PWM frequency range aligns with the system's control interface capabilities.

Part Context

The NCR321ZX belongs to the NCR321 series of LED drivers from Nexperia, which are engineered for automotive durability. This series typically includes variants like the NCR320U, offering different package options such as SOT457. The ZX suffix denotes a specific packaging configuration, likely a reel or tape format, distinct from other suffixes like U or Z. These devices are part of Nexperia's broader portfolio of logic and power management solutions for industrial markets.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Nexperia's official cross-reference tools or contact technical support directly for equivalent components. Ensure any replacement matches the AEC-Q101 qualification status and thermal performance requirements.