The OB3355CPA is a highly integrated and cost-effective Light Emitting Diode (LED) lighting controller designed by On-Bright Electronics. It is optimized for driving single-stage isolated or non-isolated LED lamps with high power factor and efficiency. This controller employs primary-side regulation (PSR) control, eliminating the need for optocouplers and simplifying the overall design of LED lighting systems.

Applications:

• LED bulb lighting
• LED tube lighting
• LED downlights
• General-purpose LED lighting applications

Features:

• Primary-Side Regulation (PSR) control for eliminating optocouplers
• High power factor correction (PFC)
• High efficiency operation
• Accurate constant current (CC) control
• Open and short circuit protection
• Over-temperature protection (OTP)
• Under-voltage lockout (UVLO)
• Cycle-by-cycle current limiting
• Low start-up current
• Compact package

Benefits:

• Reduced BOM cost due to optocoupler-free design
• Improved system reliability
• Simplified design and manufacturing process
• High power factor minimizes harmonic distortion and improves energy efficiency
• Robust protection features enhance system safety and reliability
• Energy-efficient operation reduces power consumption

Additional Details:

The OB3355CPA integrates a power MOSFET and a controller in a single package, further reducing the external component count and overall system cost. The PSR control scheme enables accurate output current regulation without the need for secondary-side feedback components. The device incorporates comprehensive protection features, including open-circuit protection, short-circuit protection, over-temperature protection, and under-voltage lockout. These features ensure the safe and reliable operation of the LED lighting system under various fault conditions. The OB3355CPA also features a low start-up current, which minimizes the inrush current during power-up and improves system stability. It is designed to meet the stringent requirements of energy-efficient LED lighting applications and complies with international safety standards.

Furthermore, the precise constant current control afforded by the OB3355CPA ensures uniform brightness across multiple LEDs, a crucial attribute for lighting applications. The device's high efficiency translates directly into lower operating temperatures and longer lifespan for the LED lighting product.