NCR402TR

Overview

The NCR402TR is a linear LED driver IC manufactured by Nexperia USA Inc., designed for constant current regulation in single-output applications. It delivers a stabilized output current of 20 mA with high accuracy across supply voltage variations. The device operates within a wide temperature range of -55°C to 150°C (TA) and supports a maximum supply voltage of 18V, with an output voltage capability of 16V. Packaged in a TO-236AB (SOT-23-3) surface-mount case, it features internal switching capabilities and is qualified under the AEC-Q101 automotive standard.

Feature Summary

• Provides stabilized 20 mA output current with high accuracy despite supply voltage fluctuations
• Requires minimal external components due to integrated resistor-equipped PNP transistor and diodes on a single chip
• Qualified for automotive applications according to AEC-Q101 standards
• Operates reliably across an extended industrial temperature range from -55°C to 150°C

Applications

• Constant current LED drivers
• Generic constant current sources
• Automotive lighting systems

Procurement Notes

Verify the specific ordering suffix to ensure the correct packaging format, such as tape-and-reel or cut tape, matches the assembly requirements. Confirm that the TO-236AB package variant aligns with the PCB footprint design. Ensure the component meets RoHS3 compliance specifications for environmental regulations. Check the latest datasheet revision to confirm pinout consistency and electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when a simple, low-component-count solution for driving LEDs at a fixed 20 mA is required. It is suitable for designs where linear regulation efficiency is acceptable and space constraints favor the compact SOT-23-3 package. Consider the 1.4 V overhead voltage drop when determining the minimum supply voltage needed for proper operation. Verify thermal dissipation capabilities, as the device handles up to 750 mW power dissipation in the specified package.

Part Context

The NCR402TR belongs to the NCRxxx series of LED drivers from Nexperia, which are characterized by their simplicity and robustness. This series utilizes a monolithic design combining a PNP transistor with resistors and diodes to achieve precise current control. The TR suffix indicates the reel packaging configuration, distinguishing it from other variants like the NCR402U which may use different packages such as SOT457.

Replacement Considerations

Direct substitutes include other Nexperia NCR series devices with similar current ratings and package types, such as the NCR402U if the SOT457 package is acceptable. Verify pin compatibility and electrical parameters against the original design requirements before swapping components.