Infineon BCR402RE6327: Constant Current Regulator for LED Applications

In the realm of LED lighting, achieving consistent brightness and ensuring long-term reliability are paramount. The Infineon BCR402RE6327 stands out as a dedicated linear constant current regulator (CCR) designed specifically to address these critical demands in a wide array of lighting applications. This device simplifies LED driver design by providing a stable current source, eliminating the need for complex circuitry and additional components.

The core function of the BCR402RE6327 is to maintain a precise and stable constant current to one or more series-connected LEDs. It operates as a two-terminal device, much like a traditional diode, but with an integrated regulator that adjusts its internal resistance to compensate for fluctuations in the supply voltage. This ensures that the forward current through the LED string remains unchanged, which is crucial for preventing LED overcurrent and thermal runaway, thereby significantly enhancing the lifespan of the LEDs.

A key advantage of this solution is its exceptional simplicity and minimal external component count. Unlike switch-mode power supplies (SMPS), the BCR402R requires no inductors or switching transistors, resulting in a very compact, cost-effective, and EMI-free design. This makes it an ideal choice for space-constrained applications such as LED bulbs, decorative lighting, signage, and automotive interior lighting.

The device is designed for a nominal current of 20 mA and can handle supply voltages up to 40 V. Its low dropout voltage and high power dissipation capability further contribute to its robustness and versatility in various circuit configurations. Engineers value the BCR402R for its ability to deliver high reliability and reduced bill of materials (BOM), streamlining both the design process and mass production.

ICGOOODFIND: The Infineon BCR402RE6327 is a superior linear constant current regulator that offers designers a simple, robust, and highly reliable solution for driving LEDs. Its ability to provide stable current from a volatile voltage source protects LEDs and guarantees consistent performance, all while minimizing system cost and complexity.

Keywords: Constant Current Regulator, LED Driver, Infineon BCR402R, Thermal Runaway Prevention, Minimal Component Count.