BCR421UW6Q-7

Overview

The BCR421UW6Q-7 is a linear LED constant current regulator manufactured by Diodes Incorporated, designed for automotive applications. It operates within an input voltage range of 1.4 V to 40 V and delivers a regulated output current of 350 mA. The device supports PWM dimming functionality and features a single channel topology. It is housed in a compact SOT-26 package and is qualified under the AEC-Q100 standard. The component functions effectively across a wide temperature range from -55°C to +150°C TJ.

Feature Summary

• Linear regulation topology ensures stable constant current output for LED loads
• Integrated PWM dimming capability allows for precise brightness control
• Automotive-grade qualification ensures reliability in harsh environments

Applications

• Automotive exterior lighting systems
• Interior vehicle illumination circuits
• LED signage drivers

Procurement Notes

Verify that the specific suffix Q-7 corresponds to the required tape and reel packaging configuration for automated assembly processes. Confirm that the AEC-Q100 qualification status meets the specific reliability requirements of the target automotive application before finalizing procurement orders.

Selection Notes

Select this component when a robust linear solution is preferred over switching regulators for simplicity and low noise. Ensure the design accommodates the thermal dissipation limits inherent to linear operation at higher voltage differentials. Verify that the 350 mA output current aligns with the forward current specifications of the intended LED array.

Part Context

This part belongs to the BCR4xxU series of linear LED drivers from Diodes Incorporated. These devices are engineered specifically for high-reliability automotive environments, offering a balance of performance and ease of implementation. The series provides various current options and packaging styles to suit diverse lighting module designs.

Replacement Considerations

Direct substitutes include the BCR421UW6-7 and BCR421UFDQ-7, provided the package type and current rating match the design requirements. Cross-reference pinouts and thermal characteristics carefully when evaluating alternative packages such as U-DFN2020-6.