BCR420UFD-7

Overview

The BCR420UFD-7 is a constant current LED driver from Diodes Incorporated, designed for high-efficiency lighting applications. It operates as a linear regulator with an integrated NPN output transistor capable of delivering a fixed output current of 20 mA. The device features a wide input voltage range and includes thermal shutdown protection to ensure reliability under varying load conditions. Packaged in a compact SOT-323 surface-mount case, it offers low quiescent current consumption and high power supply rejection ratio (PSRR), making it suitable for battery-powered and space-constrained LED driving tasks.

Feature Summary

• Integrated constant current regulation for stable LED brightness
• Built-in thermal shutdown protection for enhanced safety
• Compact SOT-323 package design for space-efficient layouts

Applications

• Portable LED indicator circuits
• Battery-operated lighting systems
• Automotive interior illumination

Procurement Notes

Verify the exact part number suffix 'UFD' corresponds to the specific tape-and-reel packaging configuration required for your assembly line. Confirm that the manufacturer's datasheet specifies the correct pinout orientation for the SOT-323 package variant used in your design. Ensure compliance with RoHS directives if applicable to your region. Cross-reference the ordering code with official distributor catalogs to avoid substitutions that may differ in packaging or testing standards.

Selection Notes

Select this component when a fixed 20 mA drive current is required for small LEDs. Consider its low dropout voltage characteristics for efficiency in low-voltage battery applications. Evaluate the thermal performance requirements against the expected ambient temperature and PCB copper area for heat dissipation. Verify that the input voltage range aligns with your system's power supply rails to prevent excessive power dissipation within the device.

Part Context

This part belongs to Diodes Incorporated's BCR series of constant current regulators, which are widely used in LED control applications. The series offers various current options and packaging styles to suit different design constraints. The BCR420UFD-7 specifically targets applications requiring precise current control in a minimal footprint, leveraging the company's expertise in analog semiconductor solutions for consumer and industrial electronics.

Replacement Considerations

Check for direct cross-reference part numbers from other manufacturers offering identical 20 mA constant current drivers in SOT-323 packages. Verify pin compatibility and electrical specifications such as dropout voltage and thermal resistance before substitution. Ensure any alternative component meets the same regulatory certifications and performance benchmarks required by your original design.