The OB3391CPA is a high-performance, highly integrated constant current controller designed by On-Bright Electronics. It is specifically tailored for driving LED lighting applications with high power factor and high efficiency. It employs primary-side regulation (PSR) control, eliminating the need for secondary feedback circuits and simplifying the overall system design while reducing the bill of materials (BOM) cost.

Applications:

• LED bulb lighting
• LED tube lighting
• LED street lighting
• LED downlights
• General lighting applications

Features:

• Primary-Side Regulation (PSR) Control: Eliminates the need for optocouplers
• High Power Factor: Achieves high power factor without external components
• Constant Current (CC) Control: Provides accurate and stable LED current
• Integrated Protection Features: Includes over-voltage, over-temperature, and short-circuit protection
• Low Start-up Current: Minimizes inrush current during startup
• Cycle-by-Cycle Current Limiting: Provides robust protection against overcurrent conditions
• Under-Voltage Lockout (UVLO): Prevents operation at low input voltages
• Compact Package: Enables small form factor designs

Benefits:

• Reduced BOM Cost: Eliminating optocouplers and external compensation components reduces the overall cost
• Simplified Design: PSR control simplifies the design and layout of LED drivers
• High Efficiency: Optimizes energy conversion for efficient LED lighting
• Enhanced Reliability: Integrated protection features ensure robust operation and prevent damage
• Improved Power Quality: High power factor minimizes harmonic distortion and improves power quality
• Compact Solution: Enables small and lightweight LED lighting products

Additional Details:

The OB3391CPA is engineered to provide a cost-effective and high-performance solution for LED lighting applications. The Primary-Side Regulation (PSR) control scheme allows for accurate constant current regulation without the need for secondary-side feedback components, simplifying the design and reducing the overall system cost. It incorporates a suite of protection features, including over-voltage protection (OVP), over-temperature protection (OTP), and short-circuit protection (SCP), which enhance system reliability and prevent damage to the LED driver and the LEDs. The high power factor correction ensures that the LED lighting system operates efficiently and complies with international standards for harmonic distortion. The low start-up current minimizes inrush current during start-up, reducing stress on the components and improving overall system reliability. Cycle-by-cycle current limiting provides robust protection against overcurrent conditions, preventing damage to the power MOSFET and other components. The under-voltage lockout (UVLO) feature prevents operation at low input voltages, ensuring stable and reliable operation. The OB3391CPA is available in a compact package, enabling the design of small and lightweight LED lighting products.

This device is well-suited for a variety of LED lighting applications, including LED bulbs, tubes, and downlights. Its high level of integration and comprehensive protection features make it an ideal choice for designers looking for a cost-effective and reliable LED driver solution.