The BCR400WH6327 is a constant current regulator (CCR) designed for driving LEDs from Infineon Technologies. It offers a cost-effective and efficient solution for various LED lighting applications, ensuring a stable and predictable current supply to the LEDs. This regulator integrates protection features and requires few external components, simplifying the design process.

Applications:

• General lighting applications.
• Automotive lighting (e.g., tail lights, brake lights).
• Architectural lighting.
• Signage and display lighting.
• Emergency lighting.
• Consumer electronics lighting.

Features:

• Constant Current Regulation: Provides a stable and predictable current to the LEDs, ensuring consistent brightness and long lifetime.
• Adjustable Output Current: The output current can be adjusted via an external resistor, allowing for flexibility in LED selection and brightness control.
• Wide Supply Voltage Range: Operates over a broad input voltage range, accommodating various power supply options.
• Integrated Over-Temperature Protection: Protects the device from thermal damage by reducing the output current when the temperature exceeds a specified limit.
• Short Circuit Protection: Protects the device and the LEDs in case of a short circuit.
• Low Dropout Voltage: Maintains regulation even with a small voltage difference between the input and output.

Benefits:

• Improved LED Lifespan: Constant current regulation prevents overdriving the LEDs, extending their lifespan.
• Consistent Brightness: Stable current supply ensures consistent brightness across different LEDs and operating conditions.
• Reduced System Cost: Requires few external components, minimizing BOM cost and board space.
• Simplified Design: Easy to use with minimal external components.
• Enhanced System Reliability: Integrated protection features prevent damage from common electrical faults.

Additional Details:

The BCR400WH6327 is typically available in a small SOT-25 package. It offers a low-side regulation scheme, where the regulator is connected between the LED cathode and ground. The output current is set by an external resistor connected to the RSET pin. The device is designed to operate at low quiescent current, contributing to energy efficiency. Because it’s a constant current regulator, it does not require external compensation components, which makes the design process simpler. It can be used in linear topology for driving low to medium power LEDs.