OB SN03ACPA

SN03A is a high power factor flyback PWM controller special for lighting applications. SN03A features an internal start-up timer for stand-alone applications, an analog multiplier with for power factor correction (PFC), zero current detector (ZCD) to ensure TM operation, a current sensing comparator with built-in leading-edge blanking, and a totem pole output ideally suited for driving a power MOSFET. SN03A offers great protection coverage including system VCC under voltage lockout (UVLO), VCC over voltage protection, Cycle-by-cycle current limiting, and gate drive output clamping for external power MOSFET protection. SN03A is a high power factor flyback PWM controller special for lighting application. The transition mode control greatly reduces the switch turn-on loss, improves the conversion efficiency and provides very good power factor correction.

• Low Start-up Current and Operating Current
• Cycle-by-Cycle Current Limiting
• Internal Leading Edge Blanking
• Analog multiplier for Power Factor Correction
• Internal Startup Timer for Stand-alone Applications
• Trimmed 1.5% Internal Band gap Reference
• Under Voltage Lockout with Hysteresis
• VCC over voltage protection
• Transition Mode (TM) Operation
• Totem Pole Output with High State Clamping
• Audio Noise Free

• Single Stage High PF Flyback AC/DC SMPS
• LED Lighting Power